Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3e597edf4f17fb6…

MALICIOUS

PDF

71.3 KB Created: 2020-12-01 13:36:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 4195728c766467311f4981755c234671 SHA-1: 5d264c081b66e6e07890572e780f5663b46c64a5 SHA-256: e3e597edf4f17fb6e9ad267c14b04dd448722f8f1e045458b66c57a77ee1207a
214 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one specifically pointing to known malicious redirector infrastructure. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting an attempt to distribute content or redirect users to potentially harmful sites. ClamAV also detected this file as 'Pdf.Phishing.Trojan'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • 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://cctraff.ru/123?utm_term=replacement+table+legs+ikea In PDF document text
    • https://wovebisaji.weebly.com/uploads/1/3/4/6/134687394/tilewejutat_mijunot.pdfIn PDF document text
    • https://biwugina.weebly.com/uploads/1/3/1/1/131163984/7753839.pdfIn PDF document text
    • https://tujezagen.weebly.com/uploads/1/3/4/7/134775207/503286.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/tofizo/the_seventh_man_story_summary.pdfIn PDF document text
    • https://s3.amazonaws.com/jevuxozazebazug/tv_moving_box_kit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3bd63ecf-ac33-4746-b623-392d384b971e/usos_y_aplicaciones_de_los_hidruros.pdfIn PDF document text
    • https://s3.amazonaws.com/kitakilesa/xuseferuxegibozinefid.pdfIn PDF document text
    • https://s3.amazonaws.com/dazifozixawus/48130393242.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eecc21a3-d34f-482a-b43b-f4a2d2272395/punctuated_equilibrium_model_of_group_development.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/39c9a099-dd2d-4cce-b344-e35dac6d1818/lor_rgb_sequences_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0e212f71-6049-4665-8495-feff9e6248f4/gekarub.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6eabf213-4d89-4674-9eb2-885d4cf3d122/63727859307.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_off0000da0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA0F 5368 bytes
SHA-256: e6eae9d5ca2600a6fa551311c1cde377959b48daf305d1561f813681a8399bcf
font_01_sfnt_off0000ec48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC48 10560 bytes
SHA-256: fc6cde65cd6d00dbdb52ccbaab6013b551d3acda8c26627a55c56b862791a37f

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