Malicious PDF — malware analysis report

Static analysis result for SHA-256 fda0534918bc7bce…

MALICIOUS

PDF

88.0 KB Created: 2021-06-30 00:19:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 925073ecc11378011550c539ca35525c SHA-1: d3e2cba7e338d0278f015c84a3f49d584c115c72 SHA-256: fda0534918bc7bce6d38a1b3659a16021c04c60f8b76d067f3934fcf6e27337c
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised CMS upload storage and disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The document body is heavily obfuscated and unreadable, providing no direct clues to its purpose beyond the embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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://allytemp.ru/uplcv?utm_term=abstract+noun+of+lazy PDF link annotation
    • https://easybuildapp.com/files/uploaded/files/jibalevobelopepenedurenup.pdfIn PDF document text
    • https://alshaabcoop.com/userfiles/file/nuxajatozajutowakudanik.pdfIn PDF document text
    • https://ancoraeducacion.com/images/wabuxapo.pdfIn PDF document text
    • https://grupahatak.pl/admin/_fck_files/file/85765367867.pdfIn PDF document text
    • http://klimagra.pl/images/wysiwyg_img/file/64803061095.pdfIn PDF document text
    • http://midel.me/userfiles/file/83998653158.pdfIn PDF document text
    • http://1970fchs50thclassreunion.com/clients/1/19/19770213778af891f1b13fa25f964f50/File/woxopavepebevelazepe.pdfIn PDF document text
    • https://him-home.ru/wp-content/plugins/super-forms/uploads/php/files/6c882cff48e452e32ae9f21270f73ecd/99535376390.pdfIn PDF document text
    • http://pospatrans.cz/UserFiles/File/xijopimek.pdfIn PDF document text
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/6d4ae51f5293f4492837e4fcfc42243b/pifikurewazikoxosukatul.pdfIn PDF document text
    • https://stakeoutllc.com/wp-content/plugins/super-forms/uploads/php/files/1515af98cbaef2a05dcb8a35ee9b1481/susugixi.pdfIn PDF document text
    • https://brod-plovdiv.com/images/98656473779.pdfIn PDF document text
    • http://kwik-it.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160c241f1cf338---susezuvumipixidixuvoke.pdfIn PDF document text
    • http://kazenergy.kz/wp-content/plugins/formcraft/file-upload/server/content/files/1609495f95ec41---delavisaxitofezazi.pdfIn PDF document text
    • https://www.superioreagle.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ec0df8b32d---54511211.pdfIn PDF document text
    • http://asesorialuishervas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ff255564e0---82521124638.pdfIn PDF document text
    • http://abwlargo.com/uploads/files/15671754824.pdfIn PDF document text
    • http://www.timtransportes.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/1606d7f3029a4f---57869300959.pdfIn PDF document text
    • http://asalsold.com/wp-content/plugins/formcraft/file-upload/server/content/files/160adc51360d68---simekuve.pdfIn PDF document text
    • http://www.alex-vasilkov.ru/images/wisdom/file/55946927192.pdfIn PDF document text
    • http://kme-kme.cz/files/file/kevipimupibavipuraler.pdfIn PDF document text
    • https://ariaparvaz.com/basefile/ariaparvazcom/files/42128135869.pdfIn PDF document text
    • http://uyaviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b4d65fbbbb8---fonigetakizag.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f603.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF603 17268 bytes
SHA-256: ba17f106bfd357884cf3414c6c4bfd9329acdac5f9cf27d801e3277b06fb1fa8
font_01_sfnt_off000122a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122A2 10500 bytes
SHA-256: fa2a322edb27c08c3840bc9996891a166dd6d1ea43fc1fdb62bd59964f58d44a
font_02_sfnt_off00013ad7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13AD7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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