Malicious PDF — malware analysis report

Static analysis result for SHA-256 2abb655668567f17…

MALICIOUS

PDF

81.5 KB Created: 2021-08-24 23:16:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 64d1792ab8918a2a2e45cd4976b68fd6 SHA-1: b35585f529825343507a676a3b98e22cce303bdd SHA-256: 2abb655668567f173f62bf277b2c6285aca7fa15211530ada1a94b4ef4baa28b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains numerous links, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://medvor.ru/uplcv?utm_term=hacked+lords+mobile PDF link annotation
    • http://akcjonariusz.com/UserFiles/file/68433131403.pdfIn PDF document text
    • https://moma-restaurant.com/wp-content/plugins/formcraft/file-upload/server/content/files/16123b63061054---32294833128.pdfIn PDF document text
    • https://aartipalette.com/userfiles/file/vegadatajiru.pdfIn PDF document text
    • http://tms-technology.com/ckfinder/userfiles/files/zefixawime.pdfIn PDF document text
    • https://www.webhisto.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1607d975a8d3fc---wutematap.pdfIn PDF document text
    • http://www.icodar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d211c129a7a---goworibilenufimugujox.pdfIn PDF document text
    • https://www.inkfactory.pk/wp-content/plugins/formcraft/file-upload/server/content/files/160de4c21510b0---zuzizivozixubowo.pdfIn PDF document text
    • https://xehowo24h.com/images/ckeditor/files/zisazu.pdfIn PDF document text
    • http://babamoleskine.com/files/file/mapita.pdfIn PDF document text
    • http://discarga.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b9c5a873ae0---babefazolum.pdfIn PDF document text
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/22b3a9e246debe99f474ceea9062b5ab/43491839475.pdfIn PDF document text
    • http://benedictinoselrosal.org/ckfinder/userfiles/files/goliloru.pdfIn PDF document text
    • http://haki.vn/uploads/files/9056231041.pdfIn PDF document text
    • https://lorenzonimmigrationlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e4555eaac9---volusiwi.pdfIn PDF document text
    • http://paroissedementon.fr/upload/files/69921773775.pdfIn PDF document text
    • http://haverfordhigh77.com/clients/e/e7/e7c5a96ea35a64a1345a575153f12e7e/File/mavexezimimagegiko.pdfIn PDF document text
    • https://celovechurch.org/wp-content/plugins/super-forms/uploads/php/files/3a4c3cbfee676c8ce463847d0ac5df74/dilaxexodegezezelib.pdfIn PDF document text
    • https://www.businesswatchguardingservices.co.uk/wp-content/plugins/super-forms/uploads/php/files/uj5i5nfpbbh18rhg30mhkbdr8f/55833664088.pdfIn PDF document text
    • http://www.salac.cz/ckfinder/userfiles/files/vazog.pdfIn PDF document text
    • http://esistore.de/userfiles/file/16098126707.pdfIn PDF document text
    • http://hidramaco.com/files/files/20923463423.pdfIn PDF document text
    • http://www.benvenutialmare.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cf00ac5303c---57886028453.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d90c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD90C 10552 bytes
SHA-256: 143dc0d295c8e8d20dc773485c65aabbb49f6ecd2f38d449977985562bd44a47
font_01_sfnt_off0000f10c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF10C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001091e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1091E 19096 bytes
SHA-256: 10a99c1a4e483af8c833bc8e779d9d51caf2dcf05e393b6a86470e274abef9bb