Malicious PDF — malware analysis report

Static analysis result for SHA-256 550f084c9eb31186…

MALICIOUS

PDF

134.7 KB Created: 2020-11-06 00:02:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 5d947173bec13d25c9af14916fa7ab4b SHA-1: d3000c7afb1d9784707bd41a4f88adebe834fb79 SHA-256: 550f084c9eb31186e00c47a7b4654f6cabbc9f70402d33ab7c32e6428bff743a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains embedded links and a document body that mentions 'Star wars galaxy of heroes hacks apk', suggesting a lure for game-related exploits. The presence of multiple external PDF links, including one pointing to a Weebly hosted PDF, indicates a potential link farm or redirection scheme. The ML classifier strongly flagged this PDF as malicious, and heuristics indicate it's designed to redirect users to external sites, likely for further exploitation or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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.
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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://traffset.ru/strik?keyword=star+wars+galaxy+of+heroes+hacks+apk PDF link annotation
    • https://votawaxamudogop.weebly.com/uploads/1/3/4/4/134400347/fesedu_tadubepefavepul.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372104/normal_5f88caafe2fa4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423431/normal_5fa2a295000e7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366365/normal_5f8f5be43c0d3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414672/normal_5f9d6ae9e3a2a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367950/normal_5f935a01550b7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424630/normal_5f9b695689a7b.pdfIn PDF document text
    • https://nudiwosesi.weebly.com/uploads/1/3/4/3/134317077/duzowazefazopasovim.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/c36c177c-7a30-4ddf-b1bb-af1827efb0fc/baluzonifalu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/99c5a251-d059-4b57-9760-4447e1abd9a1/97767814045.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/90a0b2b0-0161-4e20-ae69-c734be4abfa9/4011168687.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/66407421-184f-4f09-93a0-2d0d51ab7551/19024717674.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_off0001c321.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C321 5704 bytes
SHA-256: 6e0cb6b6eb90fb46fc85a334d1fb254d4341a235b7d1f68170de743544dc118e
font_01_sfnt_off0001d6ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D6AE 17240 bytes
SHA-256: 6a84d29d229ef155e6828d5eecfb0077e6bdbab9bd3b3214bfd80220071e3b83

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