Malicious PDF — malware analysis report

Static analysis result for SHA-256 eab8650415c4c4bf…

MALICIOUS

PDF

35.2 KB Created: 2021-07-03 15:12:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 89f7979635dc06eec17f5ad51da5bd26 SHA-1: 138f3cb5ffe1ce048841d0752ab737862b4e3f82 SHA-256: eab8650415c4c4bf31333be923594ebc278b4338211f1cbb381de9091a4a8f69
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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/406889139/coin-master-daily-free-spin-app-game-hack PDF link annotation
    • http://perpustakaanlia.net/katalog/repository/2021-line-script-hacks-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaanlia.net/katalog/repository/coin-master-card-link-free_GM406889139.pdfIn PDF document text
    • http://perpustakaanlia.net/katalog/repository/roblox-retail-tycoon-116-infinite-money-hack_GM431946152.pdfIn PDF document text
    • http://perpustakaanlia.net/katalog/repository/was-the-roblox-website-hacked_GM431946152.pdfIn PDF document text
    • http://perpustakaanlia.net/katalog/repository/free-robux-hack-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://perpustakaanlia.net/katalog/repository/how-to-get-a-free-quirk-in-boku-no-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaanlia.net/katalog/repository/hacks-for-hhcl-hockey-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaanlia.net/katalog/repository/daily-spin-coin-master-free_GM406889139.pdfIn PDF document text
    • http://perpustakaanlia.net/katalog/repository/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaanlia.net/katalog/repository/free-roblox-printable_GM431946152.pdfIn PDF document text
    • http://perpustakaanlia.net/katalog/repository/best-hacking-apps-for-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaanlia.net/katalog/repository/kazuin-how-to-hack-in-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaanlia.net/katalog/repository/2021-roblox-hacker_GM431946152.pdfIn PDF document text
    • http://perpustakaanlia.net/katalog/repository/free-robux-by-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaanlia.net/katalog/repository/how-to-cheat-in-roblox-jailbreak-glitches_GM431946152.pdfIn PDF document text
    • http://perpustakaanlia.net/katalog/repository/free-roblox-dlls-hack_GM431946152.pdfIn PDF document text
    • http://perpustakaanlia.net/katalog/repository/hack-roblox-retail-tycoon_GM431946152.pdfIn PDF document text
    • http://perpustakaanlia.net/katalog/repository/does-cheat-engine-even-work-anymore-for-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaanlia.net/katalog/repository/free-coin-master-gift-link_GM406889139.pdfIn PDF document text
    • http://perpustakaanlia.net/katalog/repository/coin-master-game-hack-link_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_off0000310a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x310A 23368 bytes
SHA-256: 5a5d4141cab271d4dd3d7ed91c004b6fc5232ce98d85d321a4841503f7d14182
font_01_sfnt_off000065fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65FE 18596 bytes
SHA-256: c60f148968409d87350eea64826c1d5db15a758400e2fd6cc53d8dcea5acf3a2

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