Malicious PDF — malware analysis report

Static analysis result for SHA-256 edca4196f4e4f2a5…

MALICIOUS

PDF

43.0 KB Created: 2021-05-16 08:03:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: e13be9c4a9366e76f897e76b4001950e SHA-1: 2ea2428f7c748a10591bd3c840e0be012b9c0be3 SHA-256: edca4196f4e4f2a540f0cb1879ea7582f27ab6634a32d0fc621877a8c550cf58
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple external links, including a primary lure for 'Coin Master Free Spins' and a large number of links to other PDFs hosted on 'asiasieja.pl'. This indicates a link farm or SEO manipulation tactic. The presence of a 'game hack' lure and a high ML score suggest malicious intent, likely to drive traffic to potentially malicious or ad-heavy sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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-free-spins-link-2021-no-verification-deutsch-game-hack PDF link annotation
    • http://asiasieja.pl/images/free-minecraft-maps_GM479516143.pdfIn PDF document text
    • http://asiasieja.pl/images/roblox-fly-hack_GM431946152.pdfIn PDF document text
    • http://asiasieja.pl/images/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://asiasieja.pl/images/toolbox-for-minecraft-pe-ios_GM479516143.pdfIn PDF document text
    • http://asiasieja.pl/images/free-robux-websites-that-work_GM431946152.pdfIn PDF document text
    • http://asiasieja.pl/images/how-to-get-free-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://asiasieja.pl/images/minecraft-servers-that-allow-hacks_GM479516143.pdfIn PDF document text
    • http://asiasieja.pl/images/how-to-get-free-gold-cards-on-coin-master_GM406889139.pdfIn PDF document text
    • http://asiasieja.pl/images/robloxbux-us-generator_GM431946152.pdfIn PDF document text
    • http://asiasieja.pl/images/roblox-hack-app_GM431946152.pdfIn PDF document text
    • http://asiasieja.pl/images/como-sacar-buen-puntaje-en-juego-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://asiasieja.pl/images/coin-master-free-spins-usa-2021_GM406889139.pdfIn PDF document text
    • http://asiasieja.pl/images/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://asiasieja.pl/images/50-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://asiasieja.pl/images/coin-master-free-soins_GM406889139.pdfIn PDF document text
    • http://asiasieja.pl/images/free-coin-master-spin-app_GM406889139.pdfIn PDF document text
    • http://asiasieja.pl/images/coin-master-game-free-download_GM406889139.pdfIn PDF document text
    • http://asiasieja.pl/images/free-coin-master-spins-daily_GM406889139.pdfIn PDF document text
    • http://asiasieja.pl/images/coin-master-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • http://asiasieja.pl/images/free-robux-no-verify_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004a5d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A5D 24796 bytes
SHA-256: b08630047544cd467092089a9275ab337a91bb009c288e1a3b695410966a51c3
font_01_sfnt_off00008399.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8399 19064 bytes
SHA-256: 1786c1695e1cfe03ab2cb4a6ae0d95f6e6e4e0c2ddd0e15a85c5675e34076ae6

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