Malicious PDF — malware analysis report

Static analysis result for SHA-256 04aa411020f71f88…

MALICIOUS

PDF

36.6 KB Created: 2021-07-05 00:39:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 44289dc18b83b35ff3830871a8024295 SHA-1: 0869b337b5e6b6e437347b6d34f2a8fd6883694e SHA-256: 04aa411020f71f883ea04f593c24d03fc6716ea74f65364a5c848719aa917c86
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure of free game currency and hacks to entice users. It contains numerous links, including a primary redirector at http://netcdn.tw/app/406889139/coin-master-free-coins-link-2021-deutsch-game-hack, which is flagged as malicious. The document body and embedded links suggest a phishing or scam campaign aiming to drive traffic to potentially harmful sites.

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.tw/app/406889139/coin-master-free-coins-link-2021-deutsch-game-hack In PDF document text
    • https://opac.heritagejkt.org/repository/how-to-hack-coin-master-apkmody_GM406889139.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/coin-master-daily-gift-free-spins-and-coins-link_GM406889139.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/how-to-hack-someones-roblox-account_GM431946152.pdfIn PDF document text
    • https://opac.heritagejkt.org//repository/coin-master-fun-hack_GM406889139.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/why-you-never-want-to-use-free-robux_GM431946152.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/http-appsmob-info-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://opac.heritagejkt.org//repository/links-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/free-spins-coin-master-no-verification_GM406889139.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/coin-master-free-spins-and-coins-daily_GM406889139.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/bloxpage-free-robux_GM431946152.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/free-virtual-items-codes-roblox_GM431946152.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/hacking-my-brothers-roblox-acaawaant_GM431946152.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/v3rmillion-roblox-hacks_GM431946152.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/free-roblox-mod-menus_GM431946152.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/robux-safe-free_GM431946152.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/how-to-get-any-item-free-on-roblox-2021_GM431946152.pdfIn PDF document text
    • https://opac.heritagejkt.org//repository/mcpe_GM479516143.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/roblox-is-being-hacked-9-21-2021_GM431946152.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/daily-spin-coin-master-free_GM406889139.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/denis-free-robux-site_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_off0000377b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x377B 22696 bytes
SHA-256: c9e44d1034028fc071c6e2b1b6949da139ab589f15135ac0ffef13dc6cc1196e
font_01_sfnt_off00006a2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A2B 19044 bytes
SHA-256: 2844f756ddbcc4a04a8e584fba3bd9ee643c4403cf9fe90d32670bab9c0c39f1

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