Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6ae6abbb5e0509d…

MALICIOUS

PDF

43.8 KB Created: 2021-05-14 20:09:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 48f1390f25904333955ae346b8b3493e SHA-1: eeee1b3d9493f78afb0e336f02636bf8fd993faa SHA-256: a6ae6abbb5e0509d9ea1bedbbe8ee7fa4c7b14c930ce1d83f22486cbd958a6f4
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous links designed to lure users into downloading game hacks and cheats, with a primary redirector URL identified. The heuristic firings indicate a malicious redirector and a link farm, suggesting a phishing or malware distribution scheme. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a malicious workflow.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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.
  • 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.
  • 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-blogspot-game-hack In PDF document text
    • http://forsan.edu.eg/images/free-coin-master-hacks-no-verification-or-survey_GM406889139.pdfIn PDF document text
    • http://forsan.edu.eg/images/freespinandcoin-blogspot-coin-master_GM406889139.pdfIn PDF document text
    • http://forsan.edu.eg/images/coin-master-hack-game-download-ios_GM406889139.pdfIn PDF document text
    • http://forsan.edu.eg/images/how-to-get-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://forsan.edu.eg/images/coin-master-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://forsan.edu.eg/images/real-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://forsan.edu.eg/images/how-to-hack-roblox-games_GM431946152.pdfIn PDF document text
    • http://forsan.edu.eg/images/minecraft-free-ios-no-verification_GM479516143.pdfIn PDF document text
    • http://forsan.edu.eg/images/free-coin-master-spins-link_GM406889139.pdfIn PDF document text
    • http://forsan.edu.eg/images/coin-master-email-rewards-link_GM406889139.pdfIn PDF document text
    • http://forsan.edu.eg/images/free-roblox-adopt-me-accounts_GM431946152.pdfIn PDF document text
    • http://forsan.edu.eg/images/roblox-free-hats_GM431946152.pdfIn PDF document text
    • http://forsan.edu.eg/images/rblx-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://forsan.edu.eg/images/how-to-get-free-roblox-hair_GM431946152.pdfIn PDF document text
    • http://forsan.edu.eg/images/minecraft-free-edition_GM479516143.pdfIn PDF document text
    • http://forsan.edu.eg/images/latest-free-spin-coin-master-daily_GM406889139.pdfIn PDF document text
    • http://forsan.edu.eg/images/free-minecraft-worlds_GM479516143.pdfIn PDF document text
    • http://forsan.edu.eg/images/how-to-hack-roblox-for-robux_GM431946152.pdfIn PDF document text
    • http://forsan.edu.eg/images/robuxlove-net-free-robux_GM431946152.pdfIn PDF document text
    • http://forsan.edu.eg/images/free-robux-accounts-2021_GM431946152.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_off00004940.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4940 29992 bytes
SHA-256: 879d90b4acad5e8e12130865a048ad3ac000c1a2cb544aae19acd20fb7f6bb1e
font_01_sfnt_off000088a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x88A1 18464 bytes
SHA-256: 3d1506adb004325b5ad849f11167115e1f90dbd1428f7e6d98779d75984a0c30

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