Malicious PDF — malware analysis report

Static analysis result for SHA-256 9dd861bb57b7c60f…

MALICIOUS

PDF

33.3 KB Created: 2021-07-06 06:48:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 986b4e59da0503e234e16379ceac2782 SHA-1: 70e9aaeaa8602f8053bead38d9db22906c9d9316 SHA-256: 9dd861bb57b7c60fd13e5556827102eba0f418ca75f9ae3e8f1897f2769b0a36
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to external websites that are flagged as malicious redirectors, specifically promoting 'free generator' or 'game hack' lures. The document body and extracted URLs strongly suggest a phishing or scam attempt aimed at users seeking in-game advantages. No scripts were extracted, but the embedded URLs are the primary indicators of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/431946152/sites-to-get-free-robux-game-hack In PDF document text
    • http://library.umla.ac.id//repository/coin-master-hack-game-download_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id//repository/how-to-hack-roblox-accounts-2021_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/free-robux-with-nothing-just-pick-amount-thats-it_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id//repository/free-robux-exe_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id//repository/free-robux-no-scam_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id//repository/minecraft-wurst-client_GM479516143.pdfIn PDF document text
    • http://library.umla.ac.id//repository/static-moonactive-net-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/free-things-on-roblox_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id//repository/coin-master-hack-no-root_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/robux-sites_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/free-music-codes-roblox_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id//repository/how-to-get-unlimited-robux_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id//repository/minecraft-hacks-pc_GM479516143.pdfIn PDF document text
    • http://library.umla.ac.id//repository/get-free-gold-cards-in-coin-master_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id//repository/pokemon-go-free-mask_GM1094591345.pdfIn PDF document text
    • http://library.umla.ac.id//repository/free-robux-real_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id//repository/pop-slots-free-vegas-casino-slot-machine-game-coin-master_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id//repository/coin-master-free-spinv1-0apkpure-com-apk_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/wurst-download_GM479516143.pdfIn PDF document text
    • http://library.umla.ac.id/repository/coin-master-hack-review_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
font_00_sfnt_off00002c4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2C4D 22244 bytes
SHA-256: 458fd00b87419e806b659c5802f86e5cbd2130c76a1ce3ab96fee6dba6a94475
font_01_sfnt_off00005d71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D71 18940 bytes
SHA-256: 12a760e2c1ec97f90af30afb205c0b6409d60b5d12cf2c59927e5ecc658ee3cf

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