Malicious PDF — malware analysis report

Static analysis result for SHA-256 cfa01abff1705a24…

MALICIOUS

PDF

84.9 KB Created: 2021-07-16 12:47:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: f6236af7cf27a86d29d43c9d429d441a SHA-1: 249e2e3837ba3aa2c0a3e459952452a0325dc1ac SHA-256: cfa01abff1705a24c1e9b0ef5abe4263b4e58ca7c6be8ce111286df34a430ba4
164 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised websites or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware delivery. The presence of urgency language further supports a phishing pretext.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 7

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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 http://innovad-ltd.com/userfiles/file/84362515883.pdf In PDF document text
    • http://tipiland.net/upload/file/98960391317.pdfIn PDF document text
    • http://fillaracingacademy.cz/ckfinder/userfiles/files/nubojotato.pdfIn PDF document text
    • https://annekienlen.fr/imagesfile/sezutitom.pdfIn PDF document text
    • https://trichynext.com/wp-content/plugins/super-forms/uploads/php/files/329b06cb97387304ab7938e6cfa65433/5180461261.pdfIn PDF document text
    • http://antwerp-rentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609843f69f3cc---toromavoti.pdfIn PDF document text
    • http://hzqzg.com/d/files/xuzetuniforojapakewexim.pdfIn PDF document text
    • http://www.tobywells.org/media/fckdir/file/zuwilusalube.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b0ec5109a3---79986581542.pdfIn PDF document text
    • http://automotiveenergy.cz/userfiles/file/50489139416.pdfIn PDF document text
    • http://www.skupp.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160bdf0dd99e11---zevedatutuw.pdfIn PDF document text
    • https://messianic.live/wp-content/plugins/super-forms/uploads/php/files/459a9774a57537126a6bd1fd308d9baa/gamefoniferi.pdfIn PDF document text
    • http://elonsummerstorage.com/wp-content/plugins/formcraft/file-upload/server/content/files/160906f1168151---vigifesozavapobozumo.pdfIn PDF document text
    • https://prikolnaya.com/wp-content/plugins/super-forms/uploads/php/files/fa4bd594da35506a2ac71217531d5ba8/lozupamonew.pdfIn PDF document text
    • http://adaviestransportltd.com/userfiles/file/vijigefi.pdfIn PDF document text
    • http://mai-colle.jp/userfiles/file/savetijeloje.pdfIn PDF document text
    • https://spencershaulageltd.co.uk/wp-content/plugins/super-forms/uploads/php/files/75cf88e61d3d0b2e1f0f125f7a4370a8/59328853354.pdfIn PDF document text
    • https://beaufortbond.com/wp-content/plugins/super-forms/uploads/php/files/5e6476bffdb83935603d1c84290c1c2a/duwomi.pdfIn PDF document text
    • http://www.esthemed.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160c8769e70546---fibowuwufapimawedis.pdfIn PDF document text
    • http://bluenanum.com/ckupload/files/legasigofomuwuzog.pdfIn PDF document text
    • https://rendiamovisibiliglinvisibili.org/file/24800050455.pdfIn PDF document text
    • http://actionelectric.pt/www/wp-content/plugins/formcraft/file-upload/server/content/files/1607224db51584---werajadudidurokew.pdfIn PDF document text
    • https://aadhaarretail.com/administrator/imagetemp/file/xomusifakupurul.pdfIn PDF document text
    • https://rebel-guitars.com/wp-content/plugins/super-forms/uploads/php/files/f8709b3f09b0fe4fe3fd25ac9ae01cff/53106179084.pdfIn PDF document text
    • http://ankurgroups.com/userfiles/file/87445743045.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=mother+negative+blood+father+positivePDF link annotation
    • 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_off0000e901.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE901 10976 bytes
SHA-256: c5a2200884c92d73a036adef33fbcde4baa8c28f1e0cebd5c4b98056f6608096
font_01_sfnt_off00010206.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10206 16884 bytes
SHA-256: 522530c38a82d5d77730f595eec38ff1b98abbd0f7c9680641ff4b413f20d8fa
font_02_sfnt_off00012e0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E0A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1