Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f7aadeb26146587…

MALICIOUS

PDF

36.1 KB Created: 2021-07-05 22:01:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 75a51bda07be528ae10a6e888130bc6c SHA-1: e9c25b36335c13e105ffbef74d54d52c0325a54e SHA-256: 2f7aadeb2614658783048f598325dd6be475e3d24f70661d243eac0abc517e87
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains numerous links to websites offering game hacks and free in-game currency, such as 'coin-master-hack-injection-game-hack'. The presence of a link farm heuristic and ML classification strongly suggests malicious intent. The document likely serves as a lure to redirect users to potentially malicious sites that could host further malware or phishing content.

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-hack-injection-game-hack PDF link annotation
    • http://lib.stie-aub.ac.id/repository/how-to-hack-roblox-top-model-wins_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/roblox-power-simulator-cheats_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/roblox-online-hack-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/how-to-get-a-free-hat-in-roblox-2021_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/free-roblox-clothes-codes_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/free-robux-codes-no-survey-or-verification_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/easy-way-to-get-free-robux-works_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/coin-master-free-shield_GM406889139.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/roblox-how-to-get-any-gamepass-for-free-2021_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/coin-master-daily-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/pubg-uc-redeem-code-2021_GM1330123889.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/roblox-sword-simulator-hack_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/rbxcity-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/roblox-giving-away-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/roblox-dungeon-quest-free-upgrades_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/free-clothes-in-roblox-catalog_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/make-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/roblox-how-to-increase-speed-using-cheat-engine_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/how-to-hack-any-roblox-account_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/hacks-for-roblox-mining-simulator_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_off000035ef.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x35EF 23296 bytes
SHA-256: 66c55d1c8337842f681c8ae7877df679985796d1c4a05d86dda01806326275ab
font_01_sfnt_off00006ac5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6AC5 18192 bytes
SHA-256: b1ce4aad51eab55aca347a921b79c2f8acd2a1fb99075b3acb5c5a3904d9a197

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