Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e2a93dda31eb232…

MALICIOUS

PDF

84.8 KB Created: 2021-06-08 22:13:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: a66ecfb2d78ee78cd5a3f58e7964fc6f SHA-1: 55526299aeeb0f4e4495ace6222f420cf802ffd6 SHA-256: 7e2a93dda31eb232898915a0449d16a89732e59740d1978aa9da1a2567a6bffc
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF sample is detected as malicious by ML classifiers and ClamAV, indicating it is likely a phishing or trojan delivery mechanism. It contains numerous links to compromised WordPress sites and disposable hosting, suggesting an attempt to distribute further malicious content. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' indicates the document may be instructing the user to open a password-protected archive, a common tactic to bypass gateway security.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://nomylo.ru/uplcv?utm_term=strength+of+materials+hibbeler+pdf PDF link annotation
    • https://connect.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/ecfa01d891691b0b5d9de2815724f400/52092331514.pdfIn PDF document text
    • http://tasarimak.net/ckfinder/userfiles/files/36690510961.pdfIn PDF document text
    • http://viaterrestre.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16091c12bd3f90---xemotezotivetizu.pdfIn PDF document text
    • http://theopenhouseclub.com/wp-content/plugins/super-forms/uploads/php/files/3a5586a2df07cc014e35893eb86ff893/23039748255.pdfIn PDF document text
    • https://www.numberoneporthill.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a6b390023de---88119125164.pdfIn PDF document text
    • http://www.patricktennis.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608bb079cddf4---97139911589.pdfIn PDF document text
    • http://maxitelt.no/wp-content/plugins/formcraft/file-upload/server/content/files/1607812a77ddea---suduzoz.pdfIn PDF document text
    • http://vipavtoufa.ru/wp-content/plugins/super-forms/uploads/php/files/a28b8bc53c772fe028b1d949d2db579f/3363684222.pdfIn PDF document text
    • https://maloneslandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072f5bbaf079---retamanilonavujepenoti.pdfIn PDF document text
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/g8et4b6cqf64suhq54j3kf9v86/venagapaxi.pdfIn PDF document text
    • http://rld-carbon.ru/file/27653874172.pdfIn PDF document text
    • http://slowjamsundays.com/wp-content/plugins/formcraft/file-upload/server/content/files/160725a0677b16---38660979258.pdfIn PDF document text
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/188f8926567d74f6d8a15da064e91440/48203285976.pdfIn PDF document text
    • http://www.deopendeur.org/imgUser/file/sopafexigenovobuxilavig.pdfIn PDF document text
    • http://extreamtuning.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160790f94c9f20---24802605535.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00012259.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x12259 20388 bytes
SHA-256: 3701f1a2a9b1d3214d3e867896616b82a8c6d487f14a9bd337b467814a3a7c66
font_00_sfnt_off0000ec0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC0B 5696 bytes
SHA-256: fcf682a8133db7671f2eae04564e478aa24b2afe92e0e73f216dc0eabc7e58b0
font_01_sfnt_off0000ff37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF37 10220 bytes
SHA-256: b4758910eae65f4ada7b3524b692f82589f8ac00e9e8f59f9e2579dea41ba8fb

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