Malicious PDF — malware analysis report

Static analysis result for SHA-256 af616c4890c16da1…

MALICIOUS

PDF

74.6 KB Created: 2021-03-10 15:02:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 930d9e4bc275a5d4fb615c9d993fe1d7 SHA-1: 0ac9f4bc689f0ace7fe1ca7d2328506ba29e54b1 SHA-256: af616c4890c16da10cd5bf2295857b8e9c0eb762769300fd5c6668bc8f861c28
216 Risk Score

Malware Insights

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

This PDF document exhibits multiple indicators of malicious activity, including a high ML classifier score and ClamAV detection as a phishing trojan. The heuristics indicate it is designed as a payment redirection lure, potentially aiming to trick users into changing bank details. It also contains a large number of external links, suggesting a link farm or SEO abuse tactic. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the heuristics strongly suggest an attempt to redirect users to malicious sites for financial fraud.

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://jottigo.ru/123?utm_term=barclays+address+for+isa+transfer+form PDF link annotation
    • http://usacreditreport.info/19768600807cua5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451754/normal_5ff69340b95aa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470967/normal_5fe411838a2f1.pdfIn PDF document text
    • http://idealica-uficiale.website/61674896600nf5cd.pdfIn PDF document text
    • http://supportcopyright.net/don_juan_mexican_restaurant_kernersvilleoy3i7.pdfIn PDF document text
    • http://moreprodukti.com/feminism_is_for_everybody_audiobookudfk2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365594/normal_6004b94f4e990.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476443/normal_60017f3a076d9.pdfIn PDF document text
    • http://1xbet-registr.site/eid_2020_wallpaper_hd_download165yb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501482/normal_6013bcade87b5.pdfIn PDF document text
    • https://vexefanakaxaki.weebly.com/uploads/1/3/4/8/134871487/jabuzis.pdfIn PDF document text
    • https://vurejubi.weebly.com/uploads/1/3/1/4/131454114/dbb41af.pdfIn PDF document text
    • https://puwedogomep.weebly.com/uploads/1/3/1/3/131382223/834702.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/gekojulog/85448967952.pdfIn PDF document text
    • https://s3.amazonaws.com/xeruxaxer/cover_letter_linkedin_template.pdfIn PDF document text
    • https://s3.amazonaws.com/dorobukasawituw/95864397212.pdfIn PDF document text
    • https://s3.amazonaws.com/faxaxos/ca_real_id_checklist.pdfIn PDF document text
    • https://s3.amazonaws.com/jaloto/barricade_transformers_war_for_cybertron.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e851.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE851 5316 bytes
SHA-256: 8072cd90356dd431847f4e0590757c627ca9b3f229d90f6dd8c1e2ee4312319f
font_01_sfnt_off0000fa5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA5D 10144 bytes
SHA-256: 2cfc2def8b5112561ce43a3901ae747b85f2f9e1867dbe271fc3a8f45b17bc98

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