Malicious PDF — malware analysis report

Static analysis result for SHA-256 4cc691d686337fcd…

MALICIOUS

PDF

33.2 KB Created: 2021-06-27 15:04:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: b12bf6608e5c31356f5635f51f98d067 SHA-1: 4e9c78d9159e3eaf95c660cb997122c9598b2f4e SHA-256: 4cc691d686337fcddf90ada3aa31a631c0ed653941e548ba5e93537d7b4dbff8
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document employs a common lure of free in-game currency for popular games to trick users into clicking malicious links. The document contains numerous links to external sites, including a known malicious redirector at http://netcdn.co/app/431946152/how-to-get-free-tix-in-roblox-pokemon-brick-bronze-game-hack, and a large number of links to other PDFs hosted on muslib.unmus.ac.id, suggesting a link farm designed for SEO manipulation or to distribute further malicious content. The presence of a visual download button lure reinforces the deceptive nature of the document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

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 http://netcdn.co/app/431946152/how-to-get-free-tix-in-roblox-pokemon-brick-bronze-game-hack In PDF document text
    • http://muslib.unmus.ac.id/repository/minecraft-dungeons-download-free_GM479516143.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/coin-master-daily-free-spins-link-facebook_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/free-robux-hack-ohne-telefonnummer_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/roblox-free-download-on-game_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/coin-master-free-spin-sites_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/free-online-games-roblox-no-download_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/how-to-get-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/free-roblox-codes_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/how-to-get-300-robux-for-free-100-working_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/cheat-files-download-roblox_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/comment-cheat-les-robux-ilimit_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/free-unlimited-no-wait-robux_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/free-links-coin-master_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/coin-master-unlimited-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/roblox-free-play-no-download-or-sign-up_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/how-to-get-robux-free-sin-pastebin-2021_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/no-human-verification-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/coin-master-free-spin-and-coins-links-2021_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/free-roblox-accounts-passwords_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/promo-codes-for-free-robux_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
font_00_sfnt_off00002beb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2BEB 21604 bytes
SHA-256: 02392cf598e4c7d459f82b6c283b627eef91765c8850df735d51219be62b4a58
font_01_sfnt_off00005b29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B29 19704 bytes
SHA-256: 42102dbb46b3f0f016d8bc3f2741cc9c890e0f3aa8e18c84c3d67d1d0ad84008

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