Malicious PDF — malware analysis report

Static analysis result for SHA-256 80b38c27e2c1c89d…

MALICIOUS

PDF

34.0 KB Created: 2021-07-04 18:34:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 187207ac89666b55072ef893cca7a5b1 SHA-1: dc804d6d7d3a62cbf32a0f912b6fe5daa6602e12 SHA-256: 80b38c27e2c1c89dd2a9b377008ccfbcda390c1c52ce0afaf2524d80462ab678
142 Risk Score

Malware Insights

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

The PDF document contains numerous links to external websites, many of which are hosted on `lib.fisipumt.ac.id` and appear to be part of a link farm or SEO manipulation scheme. The primary lure is related to game hacking, specifically for 'Coin Master' and 'Robux', suggesting a social engineering tactic to drive traffic to these malicious or deceptive sites. The ML classifier strongly indicated maliciousness, and the PDF structure itself is flagged as a link farm.

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/how-to-hack-golden-card-in-coin-master-game-hack PDF link annotation
    • http://lib.fisipumt.ac.id//repository/claim-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/robux-hack-2021-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/how-to-get-tiktok-free-fans_GM835599320.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/can-you-really-hack-coin-master-ios_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/how-to-get-free-robux-100-works-2021_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/free-coins-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/roblox-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/robux-hacking-bans_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/wurst-112_GM479516143.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/how-to-get-robux-cheat-way_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/robuxlove-net-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/free-coin-master-spins-hack_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/roblox-powering-imagination-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/wurst-hacked-client_GM479516143.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/hacking-on-alt-account-roblox_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/best-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/coin-master-hack-without-human-verification-2021_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/roblox-redeem_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/how-to-hack-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/pubg-uc-zing_GM1330123889.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_off000030a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30A0 22084 bytes
SHA-256: f00ff6506c09f995115823bd6727c24ed42b6532bbc23fcbc8a42077104fa769
font_01_sfnt_off000061aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61AA 18416 bytes
SHA-256: c3d0c18b5d8b92347c48a085c59fcdeaeb7e7ee2918923627110f676c5505f04

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