Malicious PDF — malware analysis report

Static analysis result for SHA-256 01f6528cf300ccfc…

MALICIOUS

PDF

78.4 KB Created: 2021-05-30 09:24:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: bc1dfe64137994d1a1611421cc402ef3 SHA-1: 114464f7ac4a81a27df4570a9f022374a22d4c37 SHA-256: 01f6528cf300ccfc0d3154235fc3edb70eb1a5b44038314565c8f3e9d3029b57
96 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many of which point to other PDF files, suggesting a link farm or SEO spamming tactic. One prominent URL, 'https://fokemale.ru/strik?utm_term=fast+and+furious+7+full+movie+hd+720p+free+download+in+hindi', is presented as a lure for movie downloads. The ML classifier strongly flagged this PDF as malicious, and the presence of many external links supports a malicious intent, likely related to driving traffic or distributing further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 4

  • 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.
  • 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://fokemale.ru/strik?utm_term=fast+and+furious+7+full+movie+hd+720p+free+download+in+hindi PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4497358/normal_5feeda0db1230.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393641/normal_601ac5f163951.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489853/normal_5fe42657daf3c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390373/normal_606a084fb1f6d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407552/normal_6014a40a25347.pdfIn PDF document text
    • https://vanasukir.weebly.com/uploads/1/3/2/8/132815930/boxosokipotebafow.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467306/normal_600d41c1a1be8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446921/normal_5ffbdd6db4c6e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489415/normal_5fd252252e9b2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453906/normal_602eb4823691d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461523/normal_6012d460afef6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496204/normal_604e643242a7d.pdfIn PDF document text
    • https://bodarisijusafu.weebly.com/uploads/1/3/5/3/135383154/8880642.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413564/normal_5fe467b8e06ff.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488137/normal_5fd62af5b5ec2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470401/normal_606836b99bf68.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450421/normal_600cc631da2ba.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4465924/normal_60b20811bce7e.pdfIn PDF document text
    • https://gasulemuj.weebly.com/uploads/1/3/4/3/134352818/fdc57680e04ab.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a1646b4-c4c2-4160-b158-d887b6df8ea5/crossed_by_ally_condie_summary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3745ff3a-e6a8-4a18-b421-4c17c6c67ae0/how_to_get_rubies_in_clicker_heroes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f743275-416c-4189-9c54-324f111a0ab9/65449188219.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d27d0d6-5e6a-4f86-9d2d-ff5b50ff434f/what_is_so_pin_in_dsc.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_off0000f334.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF334 5744 bytes
SHA-256: 631c4f45575b6b2bdad156c1ceb88e9ced1dcaf40850bb305a2cf42b0740f4a1
font_01_sfnt_off000106b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106B6 10660 bytes
SHA-256: 597e1eeb1eb7e721fda3598d79edf93997d63b9652ee1d27eac25c798657a7e1

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