Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc504949400ed2d7…

MALICIOUS

PDF

71.0 KB Created: 2021-09-13 19:51:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 5a5f2c25348ff3d13f2f9acbbc681eab SHA-1: 758f4fc2ce87057f5b554b8eff2b1801b4eb0064 SHA-256: fc504949400ed2d7a1bf805c9c3573282534cc25f494db973341228813e0fb91
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or malware distribution attempt. It contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the overall structure point towards an attempt to exploit users through deceptive links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://catamma.ru/uplcv?utm_term=android+pokemon+go+spoof PDF link annotation
    • http://quangphong.vn/uploads/image/files/wojexakuxer.pdfIn PDF document text
    • https://fasaac.org/temp/files/nunukepegasug.pdfIn PDF document text
    • https://cashcruis.ru/wp-content/plugins/super-forms/uploads/php/files/2a616bc38c55268436ad60f3e63ca6d4/54938700677.pdfIn PDF document text
    • http://biemmecommerciale.eu/userfiles/files/62732989760.pdfIn PDF document text
    • http://uchid.com/uploads/file/3522975202.pdfIn PDF document text
    • https://legyenegyjonapod.hu/userfiles/files/4581402118.pdfIn PDF document text
    • https://jazykovytabor.topenglish.sk/app/webroot/gallery/files/85339267228.pdfIn PDF document text
    • https://pr-dienst.ch/file/89686665737.pdfIn PDF document text
    • https://etcbt.com/userfiles/file/rexidurowoxej.pdfIn PDF document text
    • https://wic-net.com/userfiles/file/38653933869.pdfIn PDF document text
    • https://bahamianbrewery.com/ckfinder/userfiles/files/97941843203.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/16131bf1c9ff38---togurilil.pdfIn PDF document text
    • https://kirmatas.com/userfiles/file/89419251866.pdfIn PDF document text
    • http://inewbus.com/wp-content/plugins/super-forms/uploads/php/files/qiu5dv4jvocsa8v8vd9o0kdcp4/92878381710.pdfIn PDF document text
    • http://telekommarketing.com/firme_data/files/17201638483.pdfIn PDF document text
    • http://montagnobozzone.it/userfiles/files/96439860896.pdfIn PDF document text
    • https://www.okcfarmersmarket.com/wp-content/plugins/super-forms/uploads/php/files/c5568bfd4c368481a881e7c073ec9934/galuziziwere.pdfIn PDF document text
    • https://menokatea.com/ckfinder/userfiles/files/74563467609.pdfIn PDF document text
    • http://strap.sk/uploads/files/88225251731.pdfIn PDF document text
    • https://www.capitalroofingct.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130b33e8edcf---80798839363.pdfIn PDF document text
    • http://mkngsp.ru/upload/files/roxuwibebababinamuluni.pdfIn PDF document text
    • http://zawodydrwali.pl/app/webroot/userfiles/file/kipesubixamapuvudevoxox.pdfIn PDF document text
    • http://subventionsbetrug.de/wp-content/plugins/super-forms/uploads/php/files/01076tedqkcpbuarsdns57ad6a/fananegosevudopan.pdfIn PDF document text
    • http://pro-elec.ru/ckfinder/userfiles/files/81797680503.pdfIn PDF document text
    • http://badaranquehablar.com/userfiles/files/72154980220.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_off0000b3e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB3E5 16420 bytes
SHA-256: b0d8faf85cd46aede3289a901bbf506a6fdfd67149e29169a8f3561456e4b9d3
font_01_sfnt_off0000de77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE77 10608 bytes
SHA-256: 3bc6980affdb4fd2e61bf6245de80a189961bf4c519cee65569e01f54999eb1d
font_02_sfnt_off0000f673.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF673 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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