Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6fe628d104e73a3…

MALICIOUS

PDF

81.0 KB Created: 2020-12-18 03:43:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b593d41df7a17d1d1c23c42dc1a9f84a SHA-1: d8557d5c2cbc93293fa27d5c08e2cb5c86fabd39 SHA-256: d6fe628d104e73a3f71b321f5b734d16042eda9ad028e2a5b93b8f4b95bbd168
176 Risk Score

Malware Insights

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

The file is identified as malicious by multiple heuristics, including a critical ClamAV detection and an ML classifier. It contains a large number of external links, many pointing to Weebly-hosted PDFs, suggesting a link farm or redirection mechanism. One of the primary URLs, 'https://trafffi.ru/strik?utm_term=the+bastard+of+istanbul+pdf', is likely intended to lead the user to a phishing or malware distribution site. The 'SE_CALLBACK_LURE' heuristic indicates the document may also attempt to trick users into calling a fraudulent support number.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://trafffi.ru/strik?utm_term=the+bastard+of+istanbul+pdf
    • https://raxorevowipafe.weebly.com/uploads/1/3/4/7/134765671/53e2aaf5e2d1be.pdf
    • https://luvodufugatese.weebly.com/uploads/1/3/4/8/134893210/padetosagariwojure.pdf
    • https://cdn-cms.f-static.net/uploads/4451954/normal_5fb70fa3c480f.pdf
    • https://lajogaful.weebly.com/uploads/1/3/4/4/134481829/3992031.pdf
    • https://cdn-cms.f-static.net/uploads/4366018/normal_5f876046d47fb.pdf
    • https://cdn-cms.f-static.net/uploads/4393353/normal_5fa0a88dcad70.pdf
    • https://ruparowix.weebly.com/uploads/1/3/4/3/134350000/6810023.pdf
    • https://tirepululavapiw.weebly.com/uploads/1/3/4/5/134576363/5194916.pdf
    • https://jatorogerujew.weebly.com/uploads/1/3/2/7/132710569/gowijipomunolu_lirogub_loletakimup_rozugofekowe.pdf
    • https://static.s123-cdn-static.com/uploads/4422918/normal_5fc98f0fa6b72.pdf
    • https://vabuxijipureg.weebly.com/uploads/1/3/4/4/134476882/d066e07daf.pdf
    • https://cdn-cms.f-static.net/uploads/4369930/normal_5fa453020aac5.pdf
    • https://xipunozelizu.weebly.com/uploads/1/3/1/3/131382486/2207905.pdf
    • https://cdn-cms.f-static.net/uploads/4382770/normal_5f90aa975a489.pdf
    • https://gogiwujuduk.weebly.com/uploads/1/3/4/3/134352159/bufenije.pdf
    • https://cdn-cms.f-static.net/uploads/4386621/normal_5f911896a8d3a.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/4c6722f9-f5bd-4f24-aafb-939eb0aadc22/80860195280.pdf
    • 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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d37d.bin
510bedcf0a1a1150e050b8eb56fdc91d34abde98da85e3bebbdfbecf58c3a8a2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD37D 3668 bytes
font_01_sfnt_off0000e0b3.bin
924d88fae39eacd3b57c536fd32fd8a5756f4d482d81acc441472a1578c3f9c1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE0B3 5216 bytes
font_02_sfnt_off0000f25c.bin
46d041edad3b18357bb2e85b64ac0ab5fb1b0ff2d3c65b126890180a601d0250		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF25C 12264 bytes
font_03_sfnt_off00011946.bin
267cf4fdb4535bf78fef323f32f9a6e91c1cb312e8da2ef93f610d826320dc13		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11946 18028 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.