Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f12fa05e894b35f…

MALICIOUS

PDF

34.5 KB Created: 2021-06-26 03:27:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: ed8c9d39108919e1640cef08e7af9e56 SHA-1: 61f95dce74f850f0def455b4f0987ae35e8e8381 SHA-256: 5f12fa05e894b35f1cfb846780effc677a00e71429a11b36845f47ebe86ebd9d
180 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document employs a lure of free game hacks and accounts to entice users to click on malicious links. It contains multiple embedded URLs, including one pointing to a known malicious redirector infrastructure and another to a raw IP address hosting a PDF. The document's content and heuristics strongly suggest it's designed to lead users to potentially malicious content or downloads, likely as part of a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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.co/app/431946152/new-account-roblox-free-game-hack In PDF document text
    • http://103.40.122.33/akasia/repository/hack-dragon-ball-z-roblox_GM431946152.pdfPDF link annotation
    • http://103.40.122.33/akasia/repository/free-download-coin-master_GM406889139.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/free-robux-accounts_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/list-of-free-stuff-on-roblox_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/skisploit-roblox-hack_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/cheats-and-codes-for-snow-shoveling-simulator-roblox-pc_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/gift-card-roblox-free-codes_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/free-t-shirt-deacls-roblox_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/roblox-mineverse-hack_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/roblox-apocalypse-rising-hack_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/happy-birthday-isabella-roblox-speed-hacks_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/kengit-films-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/cydia-roblox-hack_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/free-roblox-pin-numbers_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/roblox-free-radio-games_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/roblox-doom-cheats_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/free-minecraft-account_GM479516143.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/free-spins-for-coin-master-app_GM406889139.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/roblox-retail-tycoon-xbox-one-cheats_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/free-pet-food-coin-master_GM406889139.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_off0000300e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x300E 22388 bytes
SHA-256: 982cecd4285c546201200ca58255f66a2f91f85c714ed00feb542bec85f7ab1f
font_01_sfnt_off0000617a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x617A 19056 bytes
SHA-256: 4c2cb885183dbc9cacf3d241da0a613dc29b20ce4cfe5b40877b2bfea57c0c6f

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