Malicious PDF — malware analysis report

Static analysis result for SHA-256 7912454bd03fb6b8…

MALICIOUS

PDF

39.4 KB Created: 2020-10-05 01:41:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 9c1d5b65859c307a8400805caaabcc46 SHA-1: 6398666d9e80bc2439e31732a6fc9e7d6a03e1ee SHA-256: 7912454bd03fb6b8ed7abf1b3084a6c4d5238fbed6700777cbd2dfb00db235c0
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many of which point to known malicious redirector infrastructure or link farms designed for SEO manipulation. The document body, though partially corrupted, contains a URL that appears to be a lure for game hacking content, suggesting a phishing or scam attempt. The ML classifier strongly indicated maliciousness, and the presence of redirector links confirms the intent to lead users to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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://gettraff.ru/strik?keyword=bloons+tower+defense+5+hacked+money In PDF document text
    • http://files.lora-thomas.com/uploads/1/3/2/8/132815015/numevade-sibewizor-muzadusakobu.pdfIn PDF document text
    • http://files.sarahaprea.com/uploads/1/3/1/3/131379246/fc28eae5277d.pdfIn PDF document text
    • http://files.palmassweettreats.com/uploads/1/3/2/3/132303013/a4647f42c206.pdfIn PDF document text
    • http://files.mariannewardart.com/uploads/1/3/1/4/131453530/jovarerobigad-bowexil-sosevivodov-jalobo.pdfIn PDF document text
    • http://files.jsptacek.com/uploads/1/3/1/6/131636941/8142766ef6ba.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/0d08a51e-f4e8-4547-98df-a0a1fe257e3a/98029519827.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/84d16698-77c5-4b48-9dab-595ad858c79f/tetesa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d7c09ccb-6412-417f-9205-df09d36fe196/tejemakudomowos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/486f12c9-6068-4227-85f0-efcccbc3784a/bilifabo.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_off00005bc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5BC7 5692 bytes
SHA-256: 579e28eb52c967bd1bb2fba0c398852bd720cd02450133e439fa859313a0422a
font_01_sfnt_off00006f1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F1C 9944 bytes
SHA-256: 8c23f7d53f9e5837acd83d664f3674820dd85215af29d94884f8fe96d5227bb9

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