Malicious PDF — malware analysis report

Static analysis result for SHA-256 273626baf48ca6f7…

MALICIOUS

PDF

45.5 KB Created: 2021-05-15 15:36:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: bb996cd80657dbeb3ae4c5e2aefcaf9d SHA-1: 59ad61519bc801341056b3a2b48af83de3f8f533 SHA-256: 273626baf48ca6f7eef84619bd1f933b2bcf62dd518af3838b2bfc29ec4583eb
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites that offer game hacks and cheats, such as 'Coin Master Hack Tool'. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of such links, suggesting a link farm designed to attract users searching for cheats. The ML classifier also flagged this PDF as malicious. The embedded URLs likely lead to malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9507

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 https://netcdn.xyz/app/406889139/coin-master-hack-tool-v1-9-apk-game-hack PDF link annotation
    • http://mypizzaoven.com/images/coin-master-free-soins_GM406889139.pdfIn PDF document text
    • http://mypizzaoven.com/images/minecraft-free-download-android-apk_GM479516143.pdfIn PDF document text
    • http://mypizzaoven.com/images/coin-master-free-spins-a2z-help_GM406889139.pdfIn PDF document text
    • http://mypizzaoven.com/images/www-roblox-robux_GM431946152.pdfIn PDF document text
    • http://mypizzaoven.com/images/free-robux-for-kids-no-verification_GM431946152.pdfIn PDF document text
    • http://mypizzaoven.com/images/coin-master-hack-ios-apk_GM406889139.pdfIn PDF document text
    • http://mypizzaoven.com/images/coin-master-hack-tool-india_GM406889139.pdfIn PDF document text
    • http://mypizzaoven.com/images/mcpe-master-coins-hack-download_GM406889139.pdfIn PDF document text
    • http://mypizzaoven.com/images/how-many-levels-does-coin-master-have_GM406889139.pdfIn PDF document text
    • http://mypizzaoven.com/images/how-to-get-free-robux-fast-and-easy_GM431946152.pdfIn PDF document text
    • http://mypizzaoven.com/images/coin-master-hack-programmers_GM406889139.pdfIn PDF document text
    • http://mypizzaoven.com/images/coin-master-free-spins-and-coins-link-today_GM406889139.pdfIn PDF document text
    • http://mypizzaoven.com/images/free-spins-coin-master-facebook_GM406889139.pdfIn PDF document text
    • http://mypizzaoven.com/images/coin-master-hacks-for-spins_GM406889139.pdfIn PDF document text
    • http://mypizzaoven.com/images/roblox-free-body_GM431946152.pdfIn PDF document text
    • http://mypizzaoven.com/images/free-dominus-roblox_GM431946152.pdfIn PDF document text
    • http://mypizzaoven.com/images/how-to-get-free-skins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://mypizzaoven.com/images/roblox-www-com_GM431946152.pdfIn PDF document text
    • http://mypizzaoven.com/images/robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • http://mypizzaoven.com/images/can-i-play-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004aa7.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4AA7 25424 bytes
SHA-256: 36352a7ba123e39513a4b983a5c56ea9b2aa636fdb3ee47df97e354a75b870b7
font_01_sfnt_off00008552.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8552 2840 bytes
SHA-256: 3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676
font_02_sfnt_off00008f03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F03 18368 bytes
SHA-256: f865939a9af2b291dea3e70cdd1104ac7269b105b0b8110a8e2b8e0726ed96db

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