Malicious PDF — malware analysis report

Static analysis result for SHA-256 b198bdddd4c9cd09…

MALICIOUS

PDF

41.6 KB Created: 2021-05-16 18:33:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 148fd35b2ef5bc4569b44b42d8ca4ff2 SHA-1: 55f6c74b790a247b6ffd9a7fe0851c82543cbfe5 SHA-256: b198bdddd4c9cd09bbc248132be3001aa1836206ec5f08f35f116e54de97c339
220 Risk Score

Malware Insights

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

This PDF document contains numerous links designed to lure users into clicking on them, promising free game currency or hacks. The primary link redirects to known malicious infrastructure, indicating a phishing or scam attempt. The document body and embedded links strongly suggest a social engineering tactic to drive traffic to potentially harmful sites.

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/431946152/free-robux-pin-codes-game-hack In PDF document text
    • https://jasapembersihtoilet.com/ckfinder/userfiles/files/fbchampion_GM406889139.pdfIn PDF document text
    • https://jasapembersihtoilet.com/ckfinder/userfiles/files/coin-master-free-spin-trick_GM406889139.pdfIn PDF document text
    • https://jasapembersihtoilet.com/ckfinder/userfiles/files/free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://jasapembersihtoilet.com/ckfinder/userfiles/files/coin-master-free-spins-2021-hack_GM406889139.pdfIn PDF document text
    • https://jasapembersihtoilet.com/ckfinder/userfiles/files/coin-master-spins_GM406889139.pdfIn PDF document text
    • https://jasapembersihtoilet.com/ckfinder/userfiles/files/coin-master-free-coins-app_GM406889139.pdfIn PDF document text
    • https://jasapembersihtoilet.com/ckfinder/userfiles/files/best-free-spin-app-for-coin-master_GM406889139.pdfIn PDF document text
    • https://jasapembersihtoilet.com/ckfinder/userfiles/files/games-like-coin-master_GM406889139.pdfIn PDF document text
    • https://jasapembersihtoilet.com/ckfinder/userfiles/files/free-game-pack-coin-master_GM406889139.pdfIn PDF document text
    • https://jasapembersihtoilet.com/ckfinder/userfiles/files/free-robux-only-username-no-human-verification_GM431946152.pdfIn PDF document text
    • https://jasapembersihtoilet.com/ckfinder/userfiles/files/pig-master-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • https://jasapembersihtoilet.com/ckfinder/userfiles/files/mobihack-roblox-hack_GM431946152.pdfIn PDF document text
    • https://jasapembersihtoilet.com/ckfinder/userfiles/files/coin-master-rewards-2021_GM406889139.pdfIn PDF document text
    • https://jasapembersihtoilet.com/ckfinder/userfiles/files/minecraft-pe-015-0-apk-free-download_GM479516143.pdfIn PDF document text
    • https://jasapembersihtoilet.com/ckfinder/userfiles/files/mcpe-master-coins-hack-download_GM406889139.pdfIn PDF document text
    • https://jasapembersihtoilet.com/ckfinder/userfiles/files/how-to-create-group-in-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://jasapembersihtoilet.com/ckfinder/userfiles/files/how-to-get-robux-without-paying_GM431946152.pdfIn PDF document text
    • https://jasapembersihtoilet.com/ckfinder/userfiles/files/how-to-get-free-hair-on-roblox_GM431946152.pdfIn PDF document text
    • https://jasapembersihtoilet.com/ckfinder/userfiles/files/minecraft-net-free_GM479516143.pdfIn PDF document text
    • https://jasapembersihtoilet.com/ckfinder/userfiles/files/is-roblox-free-on-xbox_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_off00004961.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4961 23812 bytes
SHA-256: 7281b754e0e4526577f69adcd7d0e6f4a59ab4486e454732827e999b8e739edf
font_01_sfnt_off00007fa2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7FA2 18464 bytes
SHA-256: 23872266a6577b01853888d52c04c526ac323517b7f86f8cb64f3b9e81653507

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