Malicious PDF — malware analysis report

Static analysis result for SHA-256 785524304ac836ed…

MALICIOUS

PDF

41.8 KB Created: 2021-05-12 23:54:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: b6108c9840ae9fd17b92e2aa6f6d31f5 SHA-1: b71a534185c33c56cbb4827fb84bf38186210bc0 SHA-256: 785524304ac836ed9f90ef6f33b4305219bb080e6363ebb542c95e921061f35e
220 Risk Score

Malware Insights

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

This PDF document contains numerous links to external websites, many of which are associated with known malicious redirectors or link farms. The document body and embedded links suggest a lure for game-related cheats and generators, a common tactic for distributing malware or leading users to phishing sites. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/479516143/free-minecraft-mods-game-hack In PDF document text
    • http://kita-sunshine.de/images/free-roblox-gift-card-codes-2021_GM431946152.pdfIn PDF document text
    • http://kita-sunshine.de/images/robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • http://kita-sunshine.de/images/free-printable-roblox-images_GM431946152.pdfIn PDF document text
    • http://kita-sunshine.de/images/coin-master-hack-pc-free_GM406889139.pdfIn PDF document text
    • http://kita-sunshine.de/images/free-mod-apk-coin-master_GM406889139.pdfIn PDF document text
    • http://kita-sunshine.de/images/can-you-play-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://kita-sunshine.de/images/minecraft-hack-app_GM479516143.pdfIn PDF document text
    • http://kita-sunshine.de/images/coin-master-free-spins-link-facebook_GM406889139.pdfIn PDF document text
    • http://kita-sunshine.de/images/best-free-spins-link-coin-master_GM406889139.pdfIn PDF document text
    • http://kita-sunshine.de/images/free-spins-from-coin-master_GM406889139.pdfIn PDF document text
    • http://kita-sunshine.de/images/coin-master-daily-free-spin-app_GM406889139.pdfIn PDF document text
    • http://kita-sunshine.de/images/how-do-you-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://kita-sunshine.de/images/how-to-hack-roblox-to-get-robux_GM431946152.pdfIn PDF document text
    • http://kita-sunshine.de/images/free-robux-stream_GM431946152.pdfIn PDF document text
    • http://kita-sunshine.de/images/minecraft-116-free_GM479516143.pdfIn PDF document text
    • http://kita-sunshine.de/images/coin-master-free-coins-and-spins-link_GM406889139.pdfIn PDF document text
    • http://kita-sunshine.de/images/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://kita-sunshine.de/images/free-roblox-codes_GM431946152.pdfIn PDF document text
    • http://kita-sunshine.de/images/how-to-hack-roblox-2021_GM431946152.pdfIn PDF document text
    • http://kita-sunshine.de/images/coin-master-pet-food-hack_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
stream_003_off000049e3.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x49E3 24676 bytes
SHA-256: 6069891ee605bce96ece435cbdbc0697c8f8ebfcd26898efbe5238411beec5c5
font_01_sfnt_off00008267.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8267 17884 bytes
SHA-256: adaa6c4c94b3243dd254ffbddf76305537cf905bb6459c29a6343236798c761b

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