Malicious PDF — malware analysis report

Static analysis result for SHA-256 cda172b8978971af…

MALICIOUS

PDF

32.7 KB Created: 2021-07-19 01:41:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 178be1d660cab252af90c11f7af0315e SHA-1: 6a2a5ddbe0005865b6fbd6cd039cac0aabfffbfa SHA-256: cda172b8978971af3dd133ea1b21dd7c4838afda268b5a562afc584f6a289676
160 Risk Score

Malware Insights

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

The PDF contains multiple links to known malicious redirectors and infrastructure, disguised with lures like 'free generator' and 'game hack'. The document body explicitly mentions 'Tiktok Views Free' and 'CLICK HERE TO ACCESS TIKTOK GENERATOR', reinforcing the social engineering aspect. While no scripts were directly extracted, the PDF structure and embedded links strongly suggest it's designed to lead the user to a malicious website, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9585

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 http://netcdn.tw/app/835599320/tiktok-views-free-game-hack In PDF document text
    • http://bijbelreizenisrael.nl/images/minecraft-apk-download-v1-144-2-free_GM479516143.pdfIn PDF document text
    • http://bijbelreizenisrael.nl/images/rbx-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://bijbelreizenisrael.nl/images/how-do-u-get-free-robux_GM431946152.pdfIn PDF document text
    • http://bijbelreizenisrael.nl/images/minecraft-hacker-skin_GM479516143.pdfIn PDF document text
    • http://bijbelreizenisrael.nl/images/coin-master-free-spins-daily_GM406889139.pdfIn PDF document text
    • http://bijbelreizenisrael.nl/images/how-to-get-minecraft-bedrock-edition-for-free_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
font_00_sfnt_off00002b9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2B9A 23000 bytes
SHA-256: c66fdcb849723794988b34f70a783ace96a8f87d588d7db35ab34bae24c4eee3
font_01_sfnt_off00005f81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F81 17752 bytes
SHA-256: ed90b125ba9f9ca56523df41571dae51d579609882fb5a6f38a0996a644814a5

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