Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ed2005057f5d965…

MALICIOUS

PDF

67.6 KB Created: 2021-05-14 05:30:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1c6b140170efaafb7549727b0e613708 SHA-1: 4c205aaf9730c31b88207188de1ebe22c6739e8f SHA-256: 1ed2005057f5d965a36b3d1e6231988eea2c78d206a51c4db547d9e42aa39d58
176 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links pointing to compromised WordPress upload directories and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The document body, though heavily obfuscated, contains metadata related to its creation, but no direct scripting was found. The primary attack pattern involves luring users through deceptive document content to external, potentially malicious, URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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
  • 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://crysiq.ru/uplcv?utm_term=author%2527+s+purpose+worksheet+for+second+grade
    • http://www.canadiantreasurer.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074ad6ae943d---wuretesibevopeni.pdf
    • https://www.superioreagle.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d9e992bb14---34752815066.pdf
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/160855e5677b1a---20031873867.pdf
    • https://edu-mate.kr/_UploadFile/Images/file/nofapivuvonis.pdf
    • https://borderpak.com/wp-content/plugins/super-forms/uploads/php/files/6f07132854f127b43f13318e8bbfca08/54401777613.pdf
    • http://aptchasers.com/FCKeditor/userfiles/file/zifibifap.pdf
    • https://ontime-taxi.kg/wp-content/plugins/super-forms/uploads/php/files/49a1a64bc651f9bd4913af7a42ba7ff7/25653697338.pdf
    • https://drmarlenebothma.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607687110097c---kexinaduzexibexubik.pdf
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089428374d9f---55746499247.pdf
    • http://gostium.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608baf9e43f8a---seravadikola.pdf
    • http://adamlegal.com/userfiles/file/bologiz.pdf
    • https://graffitipaintstudio.com/wp-content/plugins/super-forms/uploads/php/files/213f2b1a57812dc1e2c5f0621ceeb40c/25075883374.pdf
    • https://www.accidentinjurylascruces.com/wp-content/plugins/super-forms/uploads/php/files/5shqs0e6q01sahij6p0hir6fhi/zunevomapotegoxizapo.pdf
    • http://trainternational.in/wp-content/plugins/formcraft/file-upload/server/content/files/1608dfc9d15e42---gonimerefofubax.pdf
    • https://www.elementstraining.co.uk/wp-content/plugins/super-forms/uploads/php/files/gs36aullpmkgkobucquutc8mgj/11789291957.pdf
    • http://bjoybrands.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609da5fe43d52---35897733704.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cc46.bin
c24037607a62f5588199413956dba1d17e4bd5b61d7cb864b99a14dcce6885ff
pdf-font-stream PDF embedded font (sfnt) at offset 0xCC46 5564 bytes
font_01_sfnt_off0000df50.bin
ee9d48669f19a836990d60f34ceaa60805c9d10377a46ef980e88818dba08d78
pdf-font-stream PDF embedded font (sfnt) at offset 0xDF50 10040 bytes