Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3d6fa48287e5473…

MALICIOUS

PDF

66.0 KB Created: 2021-06-25 01:06:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 09d83d48418708a3b87501e637492061 SHA-1: 8cb52273401bce9f6f9204253a94dadc060d224d SHA-256: c3d6fa48287e5473808755f5e4fca934a08a9349ef6e4dad7c7f5368ae2cca71
214 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links to external URLs, many of which point to compromised WordPress installations or disposable hosting, suggesting a phishing or malware distribution scheme. The presence of embedded JavaScript, though not fully analyzed due to obfuscation, likely facilitates the execution of malicious actions or the download of further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8600

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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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
  • 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://dyglas.com/userData/board/file/gofesewumajemilimes.pdf
    • http://deurwater.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5b9b28af4e---95494339444.pdf
    • http://etasystem.net/userfiles/files/likasaxigosimizisuwero.pdf
    • http://agnieszkapawlik.com/userfiles/file/tawesigodej.pdf
    • http://philippinesroadshow.com/wp-content/plugins/super-forms/uploads/php/files/2af9a948ae28530e61d63937ab618503/nesinufodoxediluxubaleb.pdf
    • https://www.webplease.it/wp-content/plugins/super-forms/uploads/php/files/5ac6h1v1g1p3242cdrejn6oudo/povakelagenalatetebav.pdf
    • http://flygarfield.net/userfiles/file/33405003504.pdf
    • http://andlupa.com/userfiles/file/69670371733.pdf
    • https://felix-schulze.biz/wp-content/plugins/super-forms/uploads/php/files/omlvea55vb6flko49vk1301mmu/sogurajamuwowumibefiz.pdf
    • http://werkkledingverkoop.nl/images/docman/files/vanuzikoman.pdf
    • https://forumhrdbekasi.com/webroot/userfiles/files/xizanopar.pdf
    • http://www.sunarnuricomuisvealisverismerkezi.com/wp-content/plugins/super-forms/uploads/php/files/n0u1f4ef53tuhni0beggijpea7/xaxigarorukowosofotudawe.pdf
    • http://endustriyelkiralama.com/wp-content/plugins/super-forms/uploads/php/files/uh5l0a9rv7sgd8t6lssf96nvp6/56286901570.pdf
    • https://www.scilights.com/wp-content/plugins/super-forms/uploads/php/files/0af931399b52271c92c0de388e0db2c0/13817423694.pdf
    • https://lostsoulsmemorialnj.org/wp-content/plugins/super-forms/uploads/php/files/4a4d187604c236b20e8532f32d0c309e/narosolexobagegami.pdf
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/160c1e440056be---5840025702.pdf
    • https://georgiamusicpartners.org/wp-content/plugins/super-forms/uploads/php/files/8e4833d84a6bb39726b4f93ee5a5aab4/newamemujobob.pdf
    • https://sgpropertylawyers.com/wp-content/plugins/super-forms/uploads/php/files/d093ba7b4816a1c32a8f6219a7a7837e/dopikirowekividij.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=add+image+of+signature+to+pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e911.bin
4e053257a6559ebdfda76085ddd5cec0beef396f861a1f8d8792eb679ff08160		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE911 5200 bytes

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