Malicious PDF — malware analysis report

Static analysis result for SHA-256 fecf1ad74d3fd21e…

MALICIOUS

PDF

74.1 KB Created: 2021-02-16 01:02:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: a799e070a277667576e790acf5ef8f16 SHA-1: 28cd11a61ab2a9511680fc871140a8142b8f5a5c SHA-256: fecf1ad74d3fd21e1edf9f6fec022b63ab1cc494d289e0f6440d3da13b2550e6
264 Risk Score

Malware Insights

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

This PDF document contains a large number of embedded links, many of which point to disposable hosting and redirector infrastructure, indicating a link farm designed to distribute malicious content or phish users. The presence of a callback lure heuristic further suggests a phishing or scam attempt. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest malicious intent, likely related to phishing or malware distribution.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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.
  • 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.
  • 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://yafferge.ru/strik?utm_term=samsung+tv+customer+care+number+bhubaneswar In PDF document text
    • https://cdn.sqhk.co/tirazirevemu/b5bPmhh/castle_crashers_arena_tier_list.pdfIn PDF document text
    • https://xibatelilon.weebly.com/uploads/1/3/1/6/131637149/kenedigivetigaz.pdfIn PDF document text
    • https://cdn.sqhk.co/jorisuzil/jVhjieZ/lisosovujobipagefufetupo.pdfIn PDF document text
    • http://heleogose.online/ladatulibupipighkpt6.pdfIn PDF document text
    • https://cdn.sqhk.co/kufiremikaf/iiUB6hg/spy_game_online_stream_deutsch.pdfIn PDF document text
    • https://cdn.sqhk.co/kuzosexiwugu/h0E2Zji/32332566704.pdfIn PDF document text
    • http://bbflowers.net/windrock_trail_mapnm0vn.pdfIn PDF document text
    • http://moymagazin.xyz/13845162086izbt5.pdfIn PDF document text
    • https://cdn.sqhk.co/baxajufim/csjbggz/masukoxus.pdfIn PDF document text
    • http://tikenifoziv.22web.org/free_annual_equifax_credit_report_and_score.pdfIn PDF document text
    • https://mamowolo.weebly.com/uploads/1/3/4/7/134714390/jasedesepapisivorup.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/vuxirefare/fokubeser.pdfIn PDF document text
    • https://s3.amazonaws.com/julexekubaj/mugel.pdfIn PDF document text
    • https://s3.amazonaws.com/woberiz/autocad_viewer_free_cnet.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_off0000e2b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2B1 5576 bytes
SHA-256: fadcd6b272a6e2e1e28fa409232f469a979c82a113a8e52efe18beed52194941
font_01_sfnt_off0000f591.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF591 11224 bytes
SHA-256: 84b6ce9a3a169bef4674f174b586869953a5ac812b511fac6948655ad1d39434

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