Malicious PDF — malware analysis report

Static analysis result for SHA-256 a744729391c576e4…

MALICIOUS

PDF

42.9 KB Created: 2021-05-14 09:00:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: c141beb299d6d50ab334ce57cd758719 SHA-1: 6b273b8ca43eaf8f6f2dce954e806044dad67e9b SHA-256: a744729391c576e4a689c2023609c2102c5fa5beceb3603ce13c95f67a7b59a2
240 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains multiple links to external resources, including a primary redirector URL associated with malicious activity. The document body and extracted URLs suggest a lure related to game hacks and free spins, a common theme for phishing and malware distribution. The presence of numerous links to PDF files hosted on a seemingly legitimate repository, but with SEO-optimized slugs, indicates a potential link farm designed to attract users through search engines, ultimately leading them to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 6

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) or Microsoft license-boilerplate documents that carry no urgency or charge/dispute escalation.
  • 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/free-coin-master-spins-game-hack In PDF document text
    • http://library.atim.ac.id/repository/coin-master-online-hack-tool_GM406889139.pdfIn PDF document text
    • http://library.atim.ac.id/repository/minecraft-hax-download-no-virus_GM479516143.pdfIn PDF document text
    • http://library.atim.ac.id/repository/coin-master-free-spins-link-today-facebook_GM406889139.pdfIn PDF document text
    • http://library.atim.ac.id/repository/how-do-you-earn-robux_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/coin-master-free-spins-hack_GM406889139.pdfIn PDF document text
    • http://library.atim.ac.id/repository/get-robux-today_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/free-limiteds-roblox_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/free-roblox-money_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/wwwhaktutsin-2021-08-coinmasterfreespinandcoinlinkhtml-m-1_GM406889139.pdfIn PDF document text
    • http://library.atim.ac.id/repository/coin-master-free-spins-fb_GM406889139.pdfIn PDF document text
    • http://library.atim.ac.id/repository/free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://library.atim.ac.id/repository/blox-pink-robux-free_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/roblox-robux-hack-generator_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/how-to-hack-roblox-on-mobile_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/coin-master-hack-2021-no-human-verification_GM406889139.pdfIn PDF document text
    • http://library.atim.ac.id/repository/will-minecraft-dungeons-be-free_GM479516143.pdfIn PDF document text
    • http://library.atim.ac.id/repository/free-robux-real-working_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/coin-master-mod-apk-latest-version-free-download_GM406889139.pdfIn PDF document text
    • http://library.atim.ac.id/repository/how-to-legally-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://library.atim.ac.id/repository/how-to-hack-roblox-accounts-on-phone-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_off00004be3.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4BE3 25568 bytes
SHA-256: 42f4e1df7103dd2545da89aaecb9006553a7975e835f8fcd85ea3c2c54b295ae
font_01_sfnt_off0000868f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x868F 17884 bytes
SHA-256: dbba0adc3b1b7bb8b2e5e51fec5d28ab169e2f7a165ed2a14d616932af559aea

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