Malicious PDF — malware analysis report

Static analysis result for SHA-256 f069c825a8b32596…

MALICIOUS

PDF

39.9 KB Created: 2021-05-21 17:13:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 444caa69cffb51eac48ca44c7912bf7b SHA-1: 0c53b30fe38930151f5f7debdc920b483eb06a73 SHA-256: f069c825a8b325968a4f111f527333e5650cdbf807a70a14ee951446fd319b68
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, masquerading as 'free generators' or 'game hacks' to entice users. The document body and heuristics indicate a lure for users to click these links, likely to download a second-stage payload. No scripts were extracted, but the PDF structure and embedded URLs strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8068

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/835599320/free-tiktok-followers-instantly-game-hack In PDF document text
    • http://bit-sky.com/images/free-links-for-free-coins-and-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://bit-sky.com/images/how-to-get-free-minecraft-coins_GM479516143.pdfIn PDF document text
    • http://bit-sky.com/images/worst-roblox-avatars_GM431946152.pdfIn PDF document text
    • http://bit-sky.com/images/coin-master-hack-cheat-engine_GM406889139.pdfIn PDF document text
    • http://bit-sky.com/images/mcpe-optifine_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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00003204.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3204 28076 bytes
SHA-256: d66840b1b74ab3d09f51eaf920899c3db14f25df284a6c0a5c4e0fd1cc5e1346
font_01_sfnt_off0000709e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x709E 3048 bytes
SHA-256: 3800f20d326b18de1c37d08032be0d1af174e7246ecaa0aa6e0d8384604d7e59
font_02_sfnt_off00007b30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B30 18100 bytes
SHA-256: f27faf11ab9b731ff59c8a2736de67f71ae1dcd874c0843e76df7710bacb1c6d

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