Malicious PDF — malware analysis report

Static analysis result for SHA-256 fdde0b2eb3a7b1cc…

MALICIOUS

PDF

33.1 KB Created: 2021-07-06 09:40:15 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: b2cb781bd97fe9201a9adb79abeba59a SHA-1: e190ce6e564532945d6fdd598c96625f871b5327 SHA-256: fdde0b2eb3a7b1cca7b34c941796ac44b3fa8d5a11579b124122597c7781d760
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external sites offering game hacks and generators, indicating a lure for users to download potentially malicious content or visit phishing pages. The heuristic 'PDF_SEO_LINK_FARM' suggests a large number of these links are generated to appear as legitimate content. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a malicious intent to redirect users to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 6

  • 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.
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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-pro-gamers-game-hack PDF link annotation
    • http://103.40.122.33/akasia/repository/roblox-free-robux-no-verification_GM431946152.pdfPDF link annotation
    • http://103.40.122.33/akasia/repository/free-robux-no-verification-2021-ios_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/how-to-hack-on-roblox-no-usb-no-download_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/comment-hack-un-compte-roblox-2021_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/free-robux-generators-that-actually-works-2021_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/hack-de-invisibilidad-mega-roblox_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/promo-codes-roblox-free-stuff_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/hacks-for-roblox-prison-life_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/free-headset-roblox_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/how-to-get-free-stuff-in-catalog-roblox-2021-nick_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/how-to-sell-at-shirt-for-free-on-roblox_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/how-to-hack-in-roblox-2021-for-just-started-hackers_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/roblox-robux-hack-no-survey-no-password-no-download_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/free-spin-link-for-coin-master_GM406889139.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/roblox-headset-free_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/100-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/free-roblox-code-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/get-robux-for-free-2021_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
font_00_sfnt_off00002d20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D20 22148 bytes
SHA-256: 48365379375ef1049f164ef57026f71657615e52b7739132e49f0b86a7520779
font_01_sfnt_off00005e55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E55 18416 bytes
SHA-256: 42eb204123647df6f85ca188dd99f1d84b9bafa3d0fb5c7709fcc50fb0944608

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