Malicious PDF — malware analysis report

Static analysis result for SHA-256 1acfe6309a5b1bc4…

MALICIOUS

PDF

33.0 KB Created: 2021-06-18 13:07:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: ddb5ea73355c3754633d94d7cf9f1e4d SHA-1: 65666f8c7ac51d4d61a4295a5863107ca46e674c SHA-256: 1acfe6309a5b1bc46d3cc6b139653d47a83f2c027301f540f603762d4466b299
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

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.co/app/431946152/roblox-cruise-ship-tyccon-albatros-free-script-game-hack PDF link annotation
    • http://103.40.122.33/akasia/repository/how-to-hack-roblox-for-robux_GM431946152.pdfPDF link annotation
    • http://103.40.122.33/akasia/repository/free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/roblox-catalog-hack-2021_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/does-roblox-premium-expire_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/roblox-promo-code-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/free-robux-for-kids-no-verification_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/coin-master-hack_GM406889139.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/free-robux-message_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/how-do-you-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/pokemon-go-free-lures_GM1094591345.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/how-to-get-free-tiktok-likes_GM835599320.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/free-robux-no-human-verification-no-survey_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/free-robux-hacks-no-verification_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/how-to-get-free-robux-on-ipad_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/minecraft-pvp-hacks_GM479516143.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/coin-master-links-free-spins_GM406889139.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/como-tener-wall-hacks-en-roblox_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/earn-free-robux-for-roblox_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002a4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2A4C 22132 bytes
SHA-256: eb5897ff3005498af487a237799caf0a5996ca460a9a0614d96134f3fd14acbe
font_01_sfnt_off00005b10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B10 19536 bytes
SHA-256: 85954c20d4547c70bb3633ef1fde86da62c6c5c050c943c03bcbd5d4f6c09754

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