Malicious PDF — malware analysis report

Static analysis result for SHA-256 5be32ffe8c60f0bf…

MALICIOUS

PDF

94.2 KB Created: 2021-08-17 15:26:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: fe0b9b0003d8373b4dffdb06945adefc SHA-1: 5aa90ea42a8bd409137306107b298bc3e1879af3 SHA-256: 5be32ffe8c60f0bfb70af56560a6f60b023aa0dc0c2a398c697a15b469021fcb
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier indicating a high probability of maliciousness. The file functions as a link farm, containing numerous URLs that point to compromised WordPress sites and disposable domains. These links are likely intended to lead users to phishing pages or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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://nomylo.ru/uplcv?utm_term=fce+listening+test+2+answers PDF link annotation
    • http://elencostruzioni.it/userfiles/files/46851473668.pdfIn PDF document text
    • https://luxmarketing.agency/wp-content/plugins/super-forms/uploads/php/files/mf48l575lq34pfsghpic43l1qj/32487047110.pdfIn PDF document text
    • http://xn--h1agcmh.com/ckfinder/userfiles/files/43823204301.pdfIn PDF document text
    • http://serting.eu/userfiles/files/zepubekigidugir.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/vugojutegupofax.pdfIn PDF document text
    • https://profbuhotchet.ru/wp-content/plugins/super-forms/uploads/php/files/ed0dc679c394998fef907eaf91774726/bomegomupodidopi.pdfIn PDF document text
    • https://xn----9sbccjdbca7cyaieg1a3j.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/3d014deaa11f817e8dab54cfa91b976a/67624316021.pdfIn PDF document text
    • http://xn----7sbakn3aoflleitf3m6a.xn--p1ai/userfiles/file/66623840875.pdfIn PDF document text
    • https://mongolia-volkslift.com/uploads/files/wewul.pdfIn PDF document text
    • https://www.bouldersudbury.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608877f82a308---47198448761.pdfIn PDF document text
    • https://alphaveneers.co.uk/wp-content/plugins/super-forms/uploads/php/files/0a1b2426f3e5efbff822b3c89bc48471/66232094570.pdfIn PDF document text
    • https://djhelaly.com/wp-content/plugins/super-forms/uploads/php/files/1d25c665de829f3ae67958a344a94baa/rinakojevuzamo.pdfIn PDF document text
    • https://bowenpainter.com/wp-content/plugins/formcraft/file-upload/server/content/files/161076a5e9e6fb---tomematojezexuligopekek.pdfIn PDF document text
    • http://iwishop.hu/file/73907895864.pdfIn PDF document text
    • http://applecentervn.com/uploads/image/files/jofeto.pdfIn PDF document text
    • http://strandedtattoo.net/file/zefexutagal.pdfIn PDF document text
    • http://4seasonstours.in/userfiles/file/56005713306.pdfIn PDF document text
    • https://eyestech.in/wp-content/plugins/super-forms/uploads/php/files/dl8lgmq4daokd5ve1ks9f1etcq/nomuka.pdfIn PDF document text
    • https://ibeguiristain.com/userfiles/files/jalilolupepugux.pdfIn PDF document text
    • http://xn--vb0b83rba554gca.kr/page_data/file/20210610103414.pdfIn PDF document text
    • http://lirealestatelitigator.com/wp-content/plugins/super-forms/uploads/php/files/fce8aae27ffdb263602a57e9c43021e1/rukamafanubuvomodezuj.pdfIn PDF document text
    • http://tajesink.com/Uploadfiles/files/zolafe.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

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f6a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6A4 10468 bytes
SHA-256: 737ef3c3b1e51217dd72aabea3920c8239a222f4d4a3b2d11bc27a0992ca1764
font_01_sfnt_off00010ea6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EA6 16164 bytes
SHA-256: fd494554c7a7a2c4488382a78096c535ff133766c7221992be4f6a58596b2467
font_02_sfnt_off00012418.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12418 17848 bytes
SHA-256: 72c71e402062de2ba148c54882b263441420cedf776348d687599fe12360f274
font_03_sfnt_off0001524e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1524E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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