Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6b4a375d8c564e5…

MALICIOUS

PDF

34.5 KB Created: 2021-07-03 17:02:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 9ca8753a6855739e647e7f26ab0d67b6 SHA-1: 498dadf7b683e948a2d126f67bbb5571fb90cf14 SHA-256: a6b4a375d8c564e528a034a0f21ded8f8e3c8efb5dcc674802220a12cf681991
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to websites offering 'free generator', 'game hack', or 'free accounts' for popular games like Roblox and Coin Master. These links are flagged as malicious redirectors, indicating a likely phishing or malware distribution attempt. The document body and heuristics suggest a lure for users seeking in-game advantages, which is a common social engineering tactic.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • 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.
  • 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/431946152/free-roblox-accounts-2021-game-hack In PDF document text
    • http://cintabaca.org/katalog/repository/coin-master-attack-madness-hack_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/roblox-person_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog//repository/how-to-hack-coin-master-ios-no-jailbreak_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/roblox-redeem-codes-free_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/uprobuxcom-free-robux_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog//repository/free-coins-and-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/free-roblox-army-templats_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/boku-no-roblox-remastered-hack-chose-quirks_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/skin-roblox-girl-free_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/hack-coin-master-apk-2021_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/best-free-roblox-exploits-2021_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog//repository/coin-master-apk-hacked-3526_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/coin-master-hack-fast-org_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/how-to-make-hacking-scripts-in-roblox_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/roblox-hack-2021-download_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/pubg-uc-full-form_GM1330123889.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/minecraft-pe-hacks_GM479516143.pdfIn PDF document text
    • http://cintabaca.org/katalog//repository/how-to-get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/coin-master-free-spins-hack-2021_GM406889139.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_off00002ef2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EF2 22340 bytes
SHA-256: 1deeb63118ce3c444045706cfd52911f7d586ea82f8e6d03ea551b0e3e70a11a
font_01_sfnt_off000060ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60FF 19296 bytes
SHA-256: e80322954fcac7f4a2de879a7519f1815ce797af75ba555cfc46f0e031ec9aed