Malicious PDF — malware analysis report

Static analysis result for SHA-256 da062cc6c1d46a27…

MALICIOUS

PDF

44.5 KB Created: 2021-06-03 05:42:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 15c9e888816e8da2ea24903127925b0a SHA-1: 93efb292b4e8b08f5a5716b1dd519479aa51b88f SHA-256: da062cc6c1d46a27667f41d21dd44034b3a111ab241c3882b6643e5a42823909
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9865

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.online/app/479516143/minecraft-tools-game-hack PDF link annotation
    • http://digilib.akbidarrahma.ac.id/repository/coin-master-fan-club_GM406889139.pdfIn PDF document text
    • http://digilib.akbidarrahma.ac.id/repository/free-robux-no-human-verification-or-survey-or-download_GM431946152.pdfIn PDF document text
    • http://digilib.akbidarrahma.ac.id/repository/who-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.akbidarrahma.ac.id/repository/getrobux-now_GM431946152.pdfIn PDF document text
    • http://digilib.akbidarrahma.ac.id/repository/roblox-robux-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • http://digilib.akbidarrahma.ac.id/repository/free-roblox-dominus_GM431946152.pdfIn PDF document text
    • http://digilib.akbidarrahma.ac.id/repository/free-robux-games-that-actually-work_GM431946152.pdfIn PDF document text
    • http://digilib.akbidarrahma.ac.id/repository/free-coin-master-spin-generator_GM406889139.pdfIn PDF document text
    • http://digilib.akbidarrahma.ac.id/repository/moonactive-coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • http://digilib.akbidarrahma.ac.id/repository/free-robux-safe_GM431946152.pdfIn PDF document text
    • http://digilib.akbidarrahma.ac.id/repository/free-game-packs-for-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.akbidarrahma.ac.id/repository/coin-master-free-stuff_GM406889139.pdfIn PDF document text
    • http://digilib.akbidarrahma.ac.id/repository/roblox-hack-download_GM431946152.pdfIn PDF document text
    • http://digilib.akbidarrahma.ac.id/repository/free-spins-for-coin-master-app_GM406889139.pdfIn PDF document text
    • http://digilib.akbidarrahma.ac.id/repository/daily-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.akbidarrahma.ac.id/repository/roblox-script-executor-free_GM431946152.pdfIn PDF document text
    • http://digilib.akbidarrahma.ac.id/repository/daily-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://digilib.akbidarrahma.ac.id/repository/where-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.akbidarrahma.ac.id/repository/how-to-make-a-server-in-minecraft-java-for-free_GM479516143.pdfIn PDF document text
    • http://digilib.akbidarrahma.ac.id/repository/coin-master-free-coins-link-blogspot_GM406889139.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
stream_004_off000051b0.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x51B0 25628 bytes
SHA-256: 4fc48297844aa836ca4fb36cacb889ca7fd6b398c47b44f48d46164cc68c9a37
font_01_sfnt_off00008ce3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8CE3 17784 bytes
SHA-256: 2a833d33c5ebf10caee2e4c1b445a2173c9d4c016a2b5c4a8254ba70d54254b8

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