Malicious PDF — malware analysis report

Static analysis result for SHA-256 44d2a37c9e6225f5…

MALICIOUS

PDF

38.3 KB Created: 2021-05-21 21:35:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: a52153c587af3ca99a26461d52d4a3e3 SHA-1: ddaff59aeedaf161e8f294bb41c25d96e20c5188 SHA-256: 44d2a37c9e6225f5fb99e1654dc7e4759aa7f7a211d6b54c141cc66d625c8d8e
160 Risk Score

Malware Insights

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

The PDF contains multiple links, with one prominently leading to a malicious redirector disguised as a game hack generator. The document body and heuristics indicate a lure for free items or cheats, a common tactic for phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded links suggest it's designed to exploit user interest and redirect them to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9407

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/431946152/free-robux-without-human-verification-game-hack In PDF document text
    • http://joegibara.com.au/images/coin-master-free-spins-link-31-march-2021_GM406889139.pdfIn PDF document text
    • http://joegibara.com.au/images/daily-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://joegibara.com.au/images/coin-master-connection-lost-hack_GM406889139.pdfIn PDF document text
    • http://joegibara.com.au/images/free-robux-only-username_GM431946152.pdfIn PDF document text
    • http://joegibara.com.au/images/minecraft-life-hacks_GM479516143.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_off0000331c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x331C 27420 bytes
SHA-256: 50b9d39c7d4ecd861ad2a6143ba20e0c3b5178af58afe1978184f6a2b45703ce
font_01_sfnt_off000071ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x71CA 19224 bytes
SHA-256: 69162c0303826e3a88150cee7b6b12b50ba56e04bc46253c0e5eb9f80ac8a399

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