Malicious PDF — malware analysis report

Static analysis result for SHA-256 af26f33961bba21a…

MALICIOUS

PDF

45.6 KB Created: 2021-05-16 11:22:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 44fd12fbea0ceeb2994ccb684fb436a9 SHA-1: fa688412ef035da707624a11539e6b81c8f36864 SHA-256: af26f33961bba21a65d76b3a1aa9706574238b4ceb363bcbef89f85920821d1b
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to websites offering "game hacks" and "free items", indicating a lure for scams or phishing. The ML classifier also flagged this PDF as malicious. While no scripts were directly extracted, the PDF structure itself contains embedded URLs and link actions, suggesting an attempt to redirect the user to malicious infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9507

Heuristics 4

  • 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.
  • 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 https://netcdn.xyz/app/406889139/coin-master-free-items-game-hack In PDF document text
    • http://asiasieja.pl/images/coin-master-hack-no-verification_GM406889139.pdfIn PDF document text
    • http://asiasieja.pl/images/how-do-you-get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://asiasieja.pl/images/coin-master-collect-today-free-spin_GM406889139.pdfIn PDF document text
    • http://asiasieja.pl/images/free-coin-master-spin-app_GM406889139.pdfIn PDF document text
    • http://asiasieja.pl/images/fb-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://asiasieja.pl/images/minecraft-free-minecraft_GM479516143.pdfIn PDF document text
    • http://asiasieja.pl/images/free-robux-with-no-verification_GM431946152.pdfIn PDF document text
    • http://asiasieja.pl/images/how-to-get-free-robux-by-playing-games_GM431946152.pdfIn PDF document text
    • http://asiasieja.pl/images/roblox-jailbreak-hack-download_GM431946152.pdfIn PDF document text
    • http://asiasieja.pl/images/how-to-send-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://asiasieja.pl/images/roblox-cheat-robux_GM431946152.pdfIn PDF document text
    • http://asiasieja.pl/images/blogspot-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://asiasieja.pl/images/how-to-gift-robux-on-mobile_GM431946152.pdfIn PDF document text
    • http://asiasieja.pl/images/roblox-hack-generator_GM431946152.pdfIn PDF document text
    • http://asiasieja.pl/images/roblox-catalog-free_GM431946152.pdfIn PDF document text
    • http://asiasieja.pl/images/free-robux-generator-no-verification_GM431946152.pdfIn PDF document text
    • http://asiasieja.pl/images/free-clothing-on-roblox_GM431946152.pdfIn PDF document text
    • http://asiasieja.pl/images/coin-master-free-link-spin_GM406889139.pdfIn PDF document text
    • http://asiasieja.pl/images/how-to-hack-someones-minecraft-account_GM479516143.pdfIn PDF document text
    • http://asiasieja.pl/images/free-links-coin-master_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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004a23.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A23 26736 bytes
SHA-256: 61f8470096e445e3d85d70010612dc0922ccc23acdbb52cd3d256ce2870f386d
font_01_sfnt_off000086d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x86D1 2912 bytes
SHA-256: 6e07e6753a1b7f3946429eb05e6ec352f38d71971554550c1c0ea562d62df99c
font_02_sfnt_off000090df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x90DF 17968 bytes
SHA-256: 573beccbb9385faa7d237b72ffee946266096df963b3eebf5a3a94db09fd0704

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