Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6f211c1a12429c1…

MALICIOUS

PDF

35.1 KB Created: 2021-07-03 11:34:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-02
MD5: af4bd046bf94944cb7e9582bd41aa7d0 SHA-1: 5731f7c5bd34527d330dd57af3d41cd81f1aaeb6 SHA-256: f6f211c1a12429c134120c73076b91ff4fb18d885f8e1970ccf040780958df08
260 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains numerous links designed to lure users into clicking on what appear to be game hacks or generators. The primary link redirects to a known malicious domain, and the document body itself contains a call-to-action phrase. The presence of many SEO-optimized PDF links suggests a link farm designed to drive traffic to malicious or scam-related content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 6

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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/hack-roblox-players-game-hack In PDF document text
    • http://bbalitvet.litbang.pertanian.go.id/library/repository/how-to-hack-your-roblox-password_GM431946152.pdfIn PDF document text
    • http://bbalitvet.litbang.pertanian.go.id/library/repository/www-bandicam-com-free-robux_GM431946152.pdfIn PDF document text
    • http://bbalitvet.litbang.pertanian.go.id/library/repository/how-to-get-free-robux-without-doing-anything-2021_GM431946152.pdfIn PDF document text
    • https://bbalitvet.litbang.pertanian.go.id/library/repository/secret-robux-hack-roblox_GM431946152.pdfIn PDF document text
    • http://bbalitvet.litbang.pertanian.go.id/library/repository/minecraft-cheats-switch_GM479516143.pdfIn PDF document text
    • https://bbalitvet.litbang.pertanian.go.id/library/repository/hacks-roblox-funcinan_GM431946152.pdfIn PDF document text
    • https://bbalitvet.litbang.pertanian.go.id/library/repository/roblox-cheat-engine-money_GM431946152.pdfIn PDF document text
    • https://bbalitvet.litbang.pertanian.go.id/library/repository/hacks-para-mad-city-roblox-2021_GM431946152.pdfIn PDF document text
    • http://bbalitvet.litbang.pertanian.go.id/library/repository/how-to-get-free-skins-in-minecraft_GM479516143.pdfIn PDF document text
    • https://bbalitvet.litbang.pertanian.go.id/library/repository/chara-undertale-lua-for-nonsense-diamond-roblox-hack_GM431946152.pdfIn PDF document text
    • https://bbalitvet.litbang.pertanian.go.id/library/repository/roblox-hack-v414_GM431946152.pdfIn PDF document text
    • http://bbalitvet.litbang.pertanian.go.id/library/repository/free-coins-coin-master-blog_GM406889139.pdfIn PDF document text
    • https://bbalitvet.litbang.pertanian.go.id/library/repository/hacks-for-robux-for-roblox_GM431946152.pdfIn PDF document text
    • http://bbalitvet.litbang.pertanian.go.id/library/repository/coin-master-free-spins-link-today-facebook_GM406889139.pdfIn PDF document text
    • http://bbalitvet.litbang.pertanian.go.id/library/repository/roblox-hacking-program-free-download_GM431946152.pdfIn PDF document text
    • https://bbalitvet.litbang.pertanian.go.id/library/repository/how-to-use-hacks-on-any-game-on-roblox_GM431946152.pdfIn PDF document text
    • http://bbalitvet.litbang.pertanian.go.id/library/repository/coin-master-event-hack_GM406889139.pdfIn PDF document text
    • https://bbalitvet.litbang.pertanian.go.id/library/repository/how-to-get-roblox-credit-for-free_GM431946152.pdfIn PDF document text
    • http://bbalitvet.litbang.pertanian.go.id/library/repository/free-roblox-girl-hair-not-a-model_GM431946152.pdfIn PDF document text
    • http://bbalitvet.litbang.pertanian.go.id/library/repository/roblox-blox-no-hero-level-cheat_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_off000031a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31A7 22568 bytes
SHA-256: 5150bde918393061a528551dc670f46ede3d35f50bf695facd2e8c89c064fe4f
font_01_sfnt_off00006425.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6425 18992 bytes
SHA-256: c8ece8e41cb02cb390b78a7de8842534a538b51bc12e46e9414b78277a363219

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