Malicious PDF — malware analysis report

Static analysis result for SHA-256 35f6468c0c2d943c…

MALICIOUS

PDF

33.7 KB Created: 2021-07-03 23:34:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 3b92137be58977a2f434831c18b07ae0 SHA-1: 96ae489f828e2907d05a23026e20c000b4c602c7 SHA-256: 35f6468c0c2d943c4d5b21d3335a12ef8fd9eca1d6bd19070e5ed812bcd416e3
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one to a known malicious redirector, designed to lure users into visiting websites promising free game currency or hacks. The ML classifier strongly flagged this PDF as malicious, and the embedded URLs suggest a phishing or scam attempt. No scripts were extracted, but the primary attack vector appears to be social engineering via deceptive links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 3

  • 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.
  • 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/how-to-get-free-robux-without-doing-anything-game-hack In PDF document text
    • https://www.howard-avocats.com/assets/images/uploads/ckfinder/files/pubg-uc-hack-2021_GM1330123889.pdfIn PDF document text
    • https://www.howard-avocats.com/assets/images/uploads/ckfinder/files/rbxoffer-com-free-robux_GM431946152.pdfIn PDF document text
    • https://www.howard-avocats.com/assets/images/uploads/ckfinder/files/free-to-play-minecraft-servers_GM479516143.pdfIn PDF document text
    • https://www.howard-avocats.com/assets/images/uploads/ckfinder/files/free-robux-that-actually-works-2021_GM431946152.pdfIn PDF document text
    • https://www.howard-avocats.com/assets/images/uploads/ckfinder/files/coin-master-spin-cheat_GM406889139.pdfIn PDF document text
    • https://www.howard-avocats.com/assets/images/uploads/ckfinder/files/roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • https://www.howard-avocats.com/assets/images/uploads/ckfinder/files/roblox-script-hacks_GM431946152.pdfIn PDF document text
    • https://www.howard-avocats.com/assets/images/uploads/ckfinder/files/roblox-bloxburg-free-robux_GM431946152.pdfIn PDF document text
    • https://www.howard-avocats.com/assets/images/uploads/ckfinder/files/coin-master-daily-spin-link-app_GM406889139.pdfIn PDF document text
    • https://www.howard-avocats.com/assets/images/uploads/ckfinder/files/minecraft-noob-vs-pro-vs-hacker_GM479516143.pdfIn PDF document text
    • https://www.howard-avocats.com/assets/images/uploads/ckfinder/files/natevang-roblox-hack_GM431946152.pdfIn PDF document text
    • https://www.howard-avocats.com/assets/images/uploads/ckfinder/files/completed-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://www.howard-avocats.com/assets/images/uploads/ckfinder/files/free-shirts-on-roblox-2021_GM431946152.pdfIn PDF document text
    • https://www.howard-avocats.com/assets/images/uploads/ckfinder/files/scaciati-cheat-roblox_GM431946152.pdfIn PDF document text
    • https://www.howard-avocats.com/assets/images/uploads/ckfinder/files/how-to-get-free-coins-in-minecraft_GM479516143.pdfIn PDF document text
    • https://www.howard-avocats.com/assets/images/uploads/ckfinder/files/minecraft-pe-free-download_GM479516143.pdfIn PDF document text
    • https://www.howard-avocats.com/assets/images/uploads/ckfinder/files/coin-master-free-food_GM406889139.pdfIn PDF document text
    • https://www.howard-avocats.com/assets/images/uploads/ckfinder/files/roblox-free-robux-generator-no-survey-no-download_GM431946152.pdfIn PDF document text
    • https://www.howard-avocats.com/assets/images/uploads/ckfinder/files/coin-master-free-spins-5-10-2021_GM406889139.pdfIn PDF document text
    • https://www.howard-avocats.com/assets/images/uploads/ckfinder/files/free-minecraft-skins-xbox-one_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003476.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3476 22748 bytes
SHA-256: 26ee6d2615994e54cde9d310f77aef166d54e3f55b5fb654162b1533f7ad1137