Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa79e89398467e66…

MALICIOUS

PDF

35.7 KB Created: 2021-05-22 11:24:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 7dbd0cd91c7070461c34a15bdabcbc74 SHA-1: 6ae8d20c6ee40dec2b94ab12f707cd0808b796bf SHA-256: fa79e89398467e6652348465d0c9c040adea1bca712bf0ae0f7689e2f4b718bf
160 Risk Score

Malware Insights

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

The PDF contains multiple links to known malicious redirectors, specifically advertising a "Roblox Hack Game" generator. The document body and embedded links strongly suggest a lure to a scam or potentially a phishing site. While no scripts were explicitly extracted, the PDF structure and heuristic firings indicate it's designed to exploit user interest in game-related cheats to redirect them to malicious infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9492

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 https://netcdn.xyz/app/431946152/roblox-hack-game-game-hack In PDF document text
    • https://domc.tw/upload/files/coin-master-free-spins-youthnow_GM406889139.pdfIn PDF document text
    • https://domc.tw/upload/files/coin-master-free-spins-gratis_GM406889139.pdfIn PDF document text
    • https://domc.tw/upload/files/free-roblox-card_GM431946152.pdfIn PDF document text
    • https://domc.tw/upload/files/coin-master-hack-no-survey-2021_GM406889139.pdfIn PDF document text
    • https://domc.tw/upload/files/coin-master-hack-apk-with-fb-login_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
font_00_sfnt_off000032b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x32B8 24360 bytes
SHA-256: 541076e188dd6372ee536a959cedfbf82b31a1a694507603b62a979c2ab377d5
font_01_sfnt_off00006983.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6983 18440 bytes
SHA-256: ebafd2a9612b8145e5e0fd0fae0a522d36691e15007df27d7d415ea6fce26a90

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