Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c1da591022dfbd8…

MALICIOUS

PDF

33.6 KB Created: 2021-07-04 11:32:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 7f9038999ae0984467cd68a931110ae1 SHA-1: de57d5170ecc3ee99bdd82aee0577a862fc06ba3 SHA-256: 0c1da591022dfbd84067804b7ea558b5833ad3addd968e0547d033dc9ab982ee
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure for free game items and hacks, directing users to a malicious redirector. The document contains multiple embedded URLs that lead to other PDF files hosted on potentially malicious domains. The ML classifier strongly indicated maliciousness, and the presence of redirector links confirms a malicious workflow.

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/479516143/free-private-minecraft-server-game-hack In PDF document text
    • http://bepquannhu.vn/upload/editor/files/all-minecraft-handbooks_GM479516143.pdfIn PDF document text
    • http://bepquannhu.vn/upload/editor/files/coin-master-free-blogspot_GM406889139.pdfIn PDF document text
    • http://bepquannhu.vn/upload/editor/files/secret-codes-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://bepquannhu.vn/upload/editor/files/hack-youtube-roblox-game_GM431946152.pdfIn PDF document text
    • http://bepquannhu.vn/upload/editor/files/prison-life-vending-machine-gives-free-robux-roblox_GM431946152.pdfIn PDF document text
    • http://bepquannhu.vn/upload/editor/files/hacked-roblox-game_GM431946152.pdfIn PDF document text
    • http://bepquannhu.vn/upload/editor/files/getrobux-ninja_GM431946152.pdfIn PDF document text
    • http://bepquannhu.vn/upload/editor/files/youtube-roblox-free-cops_GM431946152.pdfIn PDF document text
    • http://bepquannhu.vn/upload/editor/files/how-to-get-free-robux-hack_GM431946152.pdfIn PDF document text
    • http://bepquannhu.vn/upload/editor/files/www-roblox-com-robux-free_GM431946152.pdfIn PDF document text
    • http://bepquannhu.vn/upload/editor/files/more-robux_GM431946152.pdfIn PDF document text
    • http://bepquannhu.vn/upload/editor/files/free-robux-gang-gang-gang_GM431946152.pdfIn PDF document text
    • http://bepquannhu.vn/upload/editor/files/huskybuckscom-free-robux_GM431946152.pdfIn PDF document text
    • http://bepquannhu.vn/upload/editor/files/flip-master-free-coins_GM406889139.pdfIn PDF document text
    • http://bepquannhu.vn/upload/editor/files/robux-hack-without-human-verification_GM431946152.pdfIn PDF document text
    • http://bepquannhu.vn/upload/editor/files/roblox-unltimate-driving-cheats_GM431946152.pdfIn PDF document text
    • http://bepquannhu.vn/upload/editor/files/free-spins-link-in-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://bepquannhu.vn/upload/editor/files/free-account-roblox-ro-ghoul_GM431946152.pdfIn PDF document text
    • http://bepquannhu.vn/upload/editor/files/coin-master-hack-facebook_GM406889139.pdfIn PDF document text
    • http://bepquannhu.vn/upload/editor/files/how-to-get-free-robux-without-subscribing_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_off000031d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31D6 21540 bytes
SHA-256: aff7076e94dcf674afd136349bbc30e39e1cfdb687bc0cbf4b113063f9e08745
font_01_sfnt_off000060fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60FD 18124 bytes
SHA-256: 211e11bb03f7cc83c5e2829b7d2ef769d4fa8cb325cdfd6bec5b2a0daef77f26

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