Malicious PDF — malware analysis report

Static analysis result for SHA-256 f62d2c70d8119085…

MALICIOUS

PDF

37.5 KB Created: 2021-05-22 19:08:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: f1b52b2bf43ad83eb62658d825af7782 SHA-1: a3eae401d01095a38715b1632f854f094dcd44f8 SHA-256: f62d2c70d8119085fb59713cd45e97af791dbcdb93190f0f8cf80fccaba4101e
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links that redirect to malicious infrastructure, specifically advertising 'free generators' or 'game hacks' for popular platforms like TikTok. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK confirms the malicious nature of these links. The presence of embedded URLs and a visual download button lure further support the phishing attempt. While no scripts were explicitly extracted, the PDF structure and embedded links suggest a common pattern of luring users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9447

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/how-to-get-free-tiktok-fans-without-human-verification-game-hack In PDF document text
    • http://fm-express.de/images/coin-master-free-coins-and-spins-app_GM406889139.pdfIn PDF document text
    • http://fm-express.de/images/coin-master-free-coins-2021_GM406889139.pdfIn PDF document text
    • http://fm-express.de/images/how-to-get-minecraft-for-free-on-phone_GM479516143.pdfIn PDF document text
    • http://fm-express.de/images/coin-master-daily-spin-free_GM406889139.pdfIn PDF document text
    • http://fm-express.de/images/coin-master-free-spins-link-download-ios_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_off0000332c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x332C 27048 bytes
SHA-256: 6a24aeb63bd145b6f64628011ef52af870a50b1a2200c3a9cfc48f9828b973d0
font_01_sfnt_off00007040.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7040 18748 bytes
SHA-256: 9c1c07c767fa9d9d53b8a100ba390363441f73e8e5d8be898b87013d8ae4ffbd

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