Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ae4beb21c8c27d9…

MALICIOUS

PDF

43.5 KB Created: 2021-05-11 23:32:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: aa7572652caeabd745b4907ab08df36b SHA-1: fa2fea9bbe47d2473c71e8f6d045994322faa9f1 SHA-256: 2ae4beb21c8c27d9c746fe4cbe25907d2f0c6c0cfdef600ee959318aaf4fb968
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links, including one to a 'free generator / game hack' lure, and a large number of external PDF links, indicating a link farm. The document body, though partially corrupted, contains references to game hacks and cheats, reinforcing the lure. The presence of numerous links suggests an attempt to manipulate search engine results or redirect users to potentially malicious content, likely as part of a phishing or scam campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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.xyz/app/431946152/roblox-hacks-and-cheats-game-hack PDF link annotation
    • http://ivpr.net/images/hack-coin-master-link_GM406889139.pdfIn PDF document text
    • http://ivpr.net/images/how-to-get-free-coins-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://ivpr.net/images/coin-master-free-coins-and-spins-daily_GM406889139.pdfIn PDF document text
    • http://ivpr.net/images/minecraft-free-apk-download-016-0_GM479516143.pdfIn PDF document text
    • http://ivpr.net/images/how-to-get-free-robux-without-downloading-any-apps_GM431946152.pdfIn PDF document text
    • http://ivpr.net/images/links-to-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://ivpr.net/images/free-robux-no-survey-or-human-verification_GM431946152.pdfIn PDF document text
    • http://ivpr.net/images/free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://ivpr.net/images/coin-master-free-gold-cards-link_GM406889139.pdfIn PDF document text
    • http://ivpr.net/images/real-free-robux-codes_GM431946152.pdfIn PDF document text
    • http://ivpr.net/images/card-hack-for-coin-master_GM406889139.pdfIn PDF document text
    • http://ivpr.net/images/60-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://ivpr.net/images/como-hackear-coin-master-espaol_GM406889139.pdfIn PDF document text
    • http://ivpr.net/images/do-you-get-minecraft-windows-10-for-free_GM479516143.pdfIn PDF document text
    • http://ivpr.net/images/free-ways-to-get-robux_GM431946152.pdfIn PDF document text
    • http://ivpr.net/images/how-to-hack-coin-master-cheat-engine_GM406889139.pdfIn PDF document text
    • http://ivpr.net/images/minecraft-client_GM479516143.pdfIn PDF document text
    • http://ivpr.net/images/get-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://ivpr.net/images/free-roblox-toy-codes-2021_GM431946152.pdfIn PDF document text
    • http://ivpr.net/images/hack-coin-master-without-human-verification_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
stream_003_off00004a62.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A62 26088 bytes
SHA-256: d54a5c4478ec776db1ff7bc782113de28bdb8966d74707504fe5cc2182fa34e7
font_01_sfnt_off000086b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x86B4 18624 bytes
SHA-256: fd38699d39b76a4f9eae772e1d62c447b40f492bf7651a7365d5b223074a20b1

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