Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e9f2b5f2308f61c…

MALICIOUS

PDF

36.6 KB Created: 2021-05-20 13:44:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 2e6a19a0c90f7245af9b2022862d2c08 SHA-1: dc61ef6b03f69ca18fc43cf867fc4b0f98422bc9 SHA-256: 9e9f2b5f2308f61c6df1785c5fbddfb8a32bcae09c1044ec067f4a24e8a5a622
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links that redirect to malicious infrastructure, specifically a site offering 'free Minecraft server hosting' and 'game hacks'. The ML classifier strongly indicated maliciousness, and the embedded URLs are associated with known malicious redirectors. The document body text and embedded URLs suggest a lure for free in-game items or services, a common social engineering tactic.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • 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.
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • 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://netcdn.xyz/app/479516143/free-minecraft-server-hosting-game-hack In PDF document text
    • http://www.buapit.ac.th/UserFiles/File/free-coins-and-spins-2021_GM406889139.pdfIn PDF document text
    • http://www.buapit.ac.th/UserFiles/File/free-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://www.buapit.ac.th/UserFiles/File/free-robux-come_GM431946152.pdfIn PDF document text
    • http://www.buapit.ac.th/UserFiles/File/coin-master-hack-cheat-engine_GM406889139.pdfIn PDF document text
    • http://www.buapit.ac.th/UserFiles/File/game-hunters-coin-master_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off000033e2.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x33E2 26512 bytes
SHA-256: 44289e2393c5c3ff1f9e00dc110ebc3b7d634d2a3e38fbc463b5af1e6ad81b26
font_01_sfnt_off00006ec2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6EC2 18112 bytes
SHA-256: 3722fe831b56fbf324865bd98e985c80b873b4d61fb4aa2a64332cfc2a086223

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