Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ff38cc1cd031d5b…

MALICIOUS

PDF

33.9 KB Created: 2021-07-01 14:45:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 44ab38cbe0f0a76c1ef95735d7c1f9bd SHA-1: a455c9c917dc598351f8214fd00e0649b9639438 SHA-256: 0ff38cc1cd031d5b6c20bd4248f156a0ab6c7ea11832f444610f2295359987a8
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links to external sites, including a primary redirector at http://netcdn.co/app/431946152/roblox-lvl-7-exploit-free-game-hack, which is flagged as malicious. The document body and heuristics indicate a lure for game hacks and generators, likely intended to lead users to malicious content or downloads. The extensive link farm suggests an attempt to manipulate search engine results or distribute malware through various deceptive means.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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/roblox-lvl-7-exploit-free-game-hack In PDF document text
    • http://muslib.unmus.ac.id/repository/how-to-make-clothes-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/roblox-protosmasher-free-download_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/how-to-hack-roblox-sites_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/roblox-robux-generator-http-freerobuxgenerator-xyz_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/coin-master-free-coin-hack_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/wie-kann-man-ihn-roblox-hacken_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/coin-master-fan-page-facebook_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/free-robux-without-survey_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/free-roblox-characters_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/how-to-close-snippet-hack-roblox_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/how-to-get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/free-robux-easy-and-fast_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/easy-roblox-hack-2021_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/roblox-stands-online-cheat_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/hacking-roblox-peps_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/free-minecraft-hosting_GM479516143.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/how-to-hack-coin-master-without-root_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/how-to-hack-roblox-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/free-spins-and-coins-on-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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002d2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D2A 22296 bytes
SHA-256: 3248ed7dbb4f6470f688ec1181010cb97848ed845c1160b3c8d0308f6570fdac
font_01_sfnt_off00005ed8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5ED8 19220 bytes
SHA-256: be5748cf3f8457dd46ad26d3a292d7cced9bcae6c678c9140c5f8a71f65d2c31

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