Malicious PDF — malware analysis report

Static analysis result for SHA-256 84f0294e9342a358…

MALICIOUS

PDF

33.6 KB Created: 2021-07-20 20:00:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: acfbc39e8036a748f8e88bd790a76724 SHA-1: 9591050b48c859b907ae26b3c7d960c5e23b8346 SHA-256: 84f0294e9342a3585100123772555abf9fac5dc07ad410c523a3858f5f911daf
160 Risk Score

Malware Insights

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

The PDF contains multiple links to redirectors and potentially malicious content, disguised as "free generators" or "game hacks". The primary redirector URL is http://netcdn.tw/app/835599320/free-followers-on-tiktok-game-hack, which is flagged as malicious. The document body also contains a call to action to "CLICK HERE TO ACCESS TIKTOK GENERATOR", reinforcing the lure. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest an attempt to exploit user curiosity for malicious purposes, likely leading to further downloads or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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/free-followers-on-tiktok-game-hack In PDF document text
    • http://libnh.stikesnh.ac.id/repository/minecraft-apk-free-download_GM479516143.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/free-tiktok-like_GM835599320.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/free-robux-legit_GM431946152.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/how-to-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/roblox-hacks-2021_GM431946152.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/coin-master-hack-without-verification_GM406889139.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/free-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/coin-master-free-soins_GM406889139.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/free-tiktok-video_GM835599320.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/how-do-you-hack-roblox_GM431946152.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_off0000300d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x300D 22800 bytes
SHA-256: 1b132149a2d5a243ebbc0e7150b090a9aa79338f4d419beccae80ebff5ecccbf
font_01_sfnt_off00006311.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6311 17692 bytes
SHA-256: 03131e98da2a54a1a72f5b4aa345640c80e569685032efd5f04fb63d3df01f9e

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