Malicious PDF — malware analysis report

Static analysis result for SHA-256 936ec05b895994f0…

MALICIOUS

PDF

70.4 KB Created: 2020-11-26 02:53:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8a1ba34480e7cb21f5c53202323b8ffb SHA-1: eb885b4929efd5c27db965099773956fee67b154 SHA-256: 936ec05b895994f03a68e945c9d5c6b82d1d96896013c777f17452cb92f5ca0a
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. The heuristic 'PDF_SEO_LINK_FARM' suggests the document contains a large number of external links, with the primary suspicious URL being 'https://trafficel.ru/strik?utm_term=common+collector+amplifier+phase+shift'. This indicates the document is likely part of a phishing or SEO spam campaign designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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
  • 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://trafficel.ru/strik?utm_term=common+collector+amplifier+phase+shift
    • https://safasisi.weebly.com/uploads/1/3/4/4/134472516/2c30e8.pdf
    • https://kuzaloxamuw.weebly.com/uploads/1/3/1/4/131406684/56487.pdf
    • https://putigazabikikim.weebly.com/uploads/1/3/2/6/132682718/varimosugiw.pdf
    • https://gikoberi.weebly.com/uploads/1/3/0/9/130969260/54322.pdf
    • https://sibakixode.weebly.com/uploads/1/3/2/8/132814768/nofezokepafepilufusi.pdf
    • https://femitinekabel.weebly.com/uploads/1/3/1/4/131437683/rirokunima_zuxawawike_gonuwaruxo.pdf
    • https://kofusozefo.weebly.com/uploads/1/3/4/5/134515267/b276fba59.pdf
    • https://gexaxiwiwa.weebly.com/uploads/1/3/4/4/134480231/kulijikasege_likodime_fopesuxererod.pdf
    • https://zoliparudoluja.weebly.com/uploads/1/3/4/6/134662317/jewidarofefinas.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/5180c62d-4b24-4c54-a016-7c6a82dcb174/pobupajejov.pdf
    • https://uploads.strikinglycdn.com/files/70afb5f1-4351-4e1b-a395-54a1d0a78500/solowanixagapuduj.pdf
    • https://uploads.strikinglycdn.com/files/98252e91-dfc5-4fe5-acbe-a815407a8318/guirek_s.a._de_c.v.pdf
    • https://uploads.strikinglycdn.com/files/03c63594-ec82-47e0-bbab-ab2b23e9a28d/tuzegudumosarajobogewe.pdf
    • https://uploads.strikinglycdn.com/files/010c4e9c-d90a-40d2-b22a-fd112c2ebbcf/joredem.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d47f.bin
631d8ce53bc8e28adb31a21fbb033b83e72795f4661b1e76124fd100023accca
pdf-font-stream PDF embedded font (sfnt) at offset 0xD47F 5160 bytes
font_01_sfnt_off0000e5e0.bin
d50ce8b78e77b4d66ea4f41daff4ef02d9ed46368bd0259d9f0ee22098c389a9
pdf-font-stream PDF embedded font (sfnt) at offset 0xE5E0 11368 bytes