Malicious PDF — malware analysis report

Static analysis result for SHA-256 a949fcc0750960e9…

MALICIOUS

PDF

85.4 KB Created: 2021-06-29 01:06:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 09e25eccabf43c33037a4859f1be3c53 SHA-1: bb76c07f3d7ae2acacea4fcbc868f0ae428ab589 SHA-256: a949fcc0750960e9316a89fba2432d8ba447c9a808e938dcd0ec16eba0b8dee4
156 Risk Score

Malware Insights

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

The PDF was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier with high confidence. It contains numerous links, many hosted on compromised CMS upload storage and disposable domains, suggesting a link farm designed to redirect users to malicious sites. The document body is heavily obfuscated and unreadable, providing no direct content clues.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

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 http://ccforum.kr/uploads/file/1621539401.pdf In PDF document text
    • https://www.schroedersales.com/wp-content/plugins/super-forms/uploads/php/files/05b1c509413917f70cab805000aaac5b/9524034508.pdfIn PDF document text
    • https://allmassage.net/upload/file/20210601205417.pdfIn PDF document text
    • https://www.hauptsache.cc/wp-content/plugins/formcraft/file-upload/server/content/files/1609ac95cf0fe5---dobosilufim.pdfIn PDF document text
    • http://hoadon-dientu.net/images/files/kosolamebimivokum.pdfIn PDF document text
    • http://ahkjt.com/upfile/file/gilikogepu.pdfIn PDF document text
    • http://ufnk.fr/app/webroot/files/file/niwaziwewezutanefota.pdfIn PDF document text
    • https://sipsib.ru/wp-content/plugins/super-forms/uploads/php/files/cdb7a7ca82da8a1e3833d0350df2eed7/45868438056.pdfIn PDF document text
    • http://mujuerp.com/uploads/ckeditor/files/20210605060742.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/4385c8ee55dbbbfad0f7555f565fa4cb/14727987889.pdfIn PDF document text
    • https://holocaustresearch.pl/nowy/photo/file/fedululopumanezigogi.pdfIn PDF document text
    • http://comicpapyrus.com/wp-content/plugins/super-forms/uploads/php/files/de37289942c0718f8faa6563e88add13/bedirakeg.pdfIn PDF document text
    • http://www.recetasyconsejos.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e17a03a336---18424046032.pdfIn PDF document text
    • http://halvani.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c998ce04a12---jifomowumawo.pdfIn PDF document text
    • http://www.saraviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cb205e8bc1a---75877593209.pdfIn PDF document text
    • http://akinmedical.com/uploads/file/surupitedafupono.pdfIn PDF document text
    • http://urbanconstructions.org/images/uploadedimages/file/55048252064.pdfIn PDF document text
    • https://frasertechno.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093aef88fe96---94728788763.pdfIn PDF document text
    • http://kpdb.org/userfiles/files/51588194973.pdfIn PDF document text
    • https://luminex.pl/upload/file/xipakus.pdfIn PDF document text
    • http://redwoodpwr.com/wp-content/plugins/super-forms/uploads/php/files/30r9m1p67kvesr82i7krvolu65/dekepi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=best+pear+for+baby+foodPDF 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_off0000ea6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA6D 10556 bytes
SHA-256: 68a9c671f17df06175c7ac337016600668d01fbebb5ebcb1a75341153b0f2d63
font_01_sfnt_off0001027a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1027A 17180 bytes
SHA-256: b2dbff28ba189de38992587ea04f8ac591e164917a8a93f94c138cc728765b68
font_02_sfnt_off00012f22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F22 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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