Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad4ee4f128e0cf05…

MALICIOUS

PDF

53.2 KB Created: 2021-06-11 02:15:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 684a6d736c79cd1cbf86132c6b7e51df SHA-1: ab82f4a99beed206dc0bf252d92d9b43f3f793d1 SHA-256: ad4ee4f128e0cf0547eee4be8a773a9de04c0751bb8347cf781f637ddc552a9b
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links to external websites, many of which appear to be part of a link farm hosted on 'sellitafrica.com'. The primary lure relates to game hacks and cheat codes for games like Roblox and Coin Master. The presence of a 'PDF SEO Link Farm' heuristic indicates a high likelihood of this document being used for malicious purposes, such as driving traffic to malicious sites or distributing further payloads. No scripts were extracted, but the document's structure and linked content suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9607

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.tw/app/431946152/roblox-cheat-codes-for-rocitizens-game-hack PDF link annotation
    • http://sellitafrica.com/media/storage/editor/files/how-tom-change-birthday-on-roblox-under-13-without-hacks_GM431946152.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/free-spins-coin-master-apple_GM406889139.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/how-to-get-a-lot-of-robux_GM431946152.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/free-robux-only-1-step_GM431946152.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/wurst-commands_GM479516143.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/coin-master-time-hack-ios_GM406889139.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/coin-master-blogspot-free-spins_GM406889139.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/how-to-get-free-spins-and-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/how-to-hack-roblox-accounts-october-2021_GM431946152.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/minecraft-on-computer-free_GM479516143.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/get-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/coin-master-34-4-hack-download_GM406889139.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/coin-master-app-for-free-spins_GM406889139.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/coin-master-hacks-that-actually-work_GM406889139.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/how-to-get-creative-mode-in-minecraft-server-hack_GM479516143.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/how-to-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/robux-come_GM431946152.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/free-robux-2021_GM431946152.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/hack-the-coin-master-game_GM406889139.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/coin-master-400-spin-link_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005511.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5511 25552 bytes
SHA-256: 0d76ff6b68f2e284d2943a772f901328c9cc2bb09f819bc09b1b8c258705b6eb
font_01_sfnt_off00008f9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F9D 2956 bytes
SHA-256: 7afcbc6afeafc927d10c29b8cc09bc3a46870eb52793bc1217b542c68b3b1aca
font_02_sfnt_off000099d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x99D8 7448 bytes
SHA-256: a76ff9b4805dcff342f7268a16e2e3c2ff2b31b96c381fe4deb6ceea777bce90
font_03_sfnt_off0000abbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xABBB 18820 bytes
SHA-256: 6e2b3ea641125a8d613765c13602043fdae2b15961e2b0fde59c1570874fdf32

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