Malicious PDF — malware analysis report

Static analysis result for SHA-256 6702cb14497af931…

MALICIOUS

PDF

128.4 KB Created: 2021-06-26 21:12:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: c40b2030006a9b1c3c3417098e45f136 SHA-1: cdaefb2822417e78c2a7148f9075d65bfd1f5ee4 SHA-256: 6702cb14497af93194624a0c7569498e1f59b15c049d5436935e0e35ed8ee6d9
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a large number of links pointing to compromised CMS upload directories, indicating it functions as a link farm. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. The embedded URLs are the primary indicators of compromise, leading to potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9549

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://www.cpro.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607e2f6c0c3e7---tixuwubilukabasefi.pdf In PDF document text
    • https://spectrumohio.com/wp-content/plugins/super-forms/uploads/php/files/6761748cc6d8e54cad4d48be94383619/59320667281.pdfIn PDF document text
    • https://bayardplaza.co.uk/wp-content/plugins/super-forms/uploads/php/files/cjf4565u0nfkcfrlqe1hfp7tiu/mawakujibazolawukaru.pdfIn PDF document text
    • https://catherinehourihan.art/wp-content/plugins/super-forms/uploads/php/files/39777a4949fc5f9cead3e337224c8a79/vofiko.pdfIn PDF document text
    • https://vidolamerica.org/wp-content/plugins/super-forms/uploads/php/files/7f975b66af6fde8d731e04753f866408/rorotaj.pdfIn PDF document text
    • http://evabody.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160985f89b7b84---sabegigol.pdfIn PDF document text
    • https://truck-diagnostic.ru/wp-content/plugins/super-forms/uploads/php/files/772710ac5c92f5a9135e3bbb03c9c812/jisafelituvibepudi.pdfIn PDF document text
    • https://englewoodgrassfarm.com/wp-content/plugins/super-forms/uploads/php/files/d73fa0d5628a3cf20bdd8cad9042c16a/83740074778.pdfIn PDF document text
    • https://www.ogblfrontaliers.fr/wp-content/plugins/super-forms/uploads/php/files/58ong5gte5fubkv67bi4uvdmm0/deranez.pdfIn PDF document text
    • https://www.isnb.co.uk/wp-content/plugins/super-forms/uploads/php/files/cbc25bdddc85beced24f8cac53b0dbd4/27028142881.pdfIn PDF document text
    • https://www.wikiwebagency.it/wp-content/plugins/super-forms/uploads/php/files/2858ec9dcf19a06c88fc8c2f8b6afaea/50026179920.pdfIn PDF document text
    • https://www.popcaffe.it/wp-content/plugins/super-forms/uploads/php/files/2262a536b3ab654b00973e806d909a20/85298127670.pdfIn PDF document text
    • https://oceanflowerhotel.com/uploads/image/files/munagen.pdfIn PDF document text
    • https://www.nordatec.com/wp-content/plugins/super-forms/uploads/php/files/4a2iactk4koqghjdufbu7s6cvn/jugozizerexilaxiti.pdfIn PDF document text
    • https://themodernla.com/wp-content/plugins/super-forms/uploads/php/files/33bdf8cf366b0c9443b446e77ea4e6ba/6909913592.pdfIn PDF document text
    • https://husvagnsexpo.se/wp-content/plugins/formcraft/file-upload/server/content/files/160b32e1d0653e---pewixalunovifitotile.pdfIn PDF document text
    • https://www.elektrobetrieb-scholz.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608dc03aae585---5475760455.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/lochda0kdrhptoee360t31fir3/dokarakig.pdfIn PDF document text
    • http://www.acefence.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a06cff04f00---11606903911.pdfIn PDF document text
    • http://carszana.com/image/upload/File/biximuxo.pdfIn PDF document text
    • https://swotin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b77369ac1dc---tilimefafizuwarozalon.pdfIn PDF document text
    • http://vegasoft.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160c54babe52ce---bolux.pdfIn PDF document text
    • https://puntoagricoltura.it/file/38828681332.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=to+bring+about+meaningPDF link annotation
    • http://s292376414.onlinehome.fr/datas/imgmail/file/julov.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off0001104c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1104C 30752 bytes
SHA-256: 05f136c97d2d21b50909d341431b09579aa7de071d07f83bd1188b91d0c64424
font_01_sfnt_off00014a37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14A37 13916 bytes
SHA-256: 92f13088ac0c91afe03f185e196d89b53af35b9a53f7d617da5d146fd803fb00
font_02_sfnt_off000175ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x175AE 10440 bytes
SHA-256: 118d1f28e723fbaa804cd9df073cb9b1eb9986a44b3602492a9021bd1d89d7ef
font_03_sfnt_off00018d5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18D5D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_04_sfnt_off0001a56f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A56F 34276 bytes
SHA-256: 486c219a61f43a9d1e408758122efc36b62c3379a199912ce2870b56be8764f6

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