Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4d0979b976ff5c2…

MALICIOUS

PDF

34.2 KB Created: 2021-06-22 22:42:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 7cb00539ffd59339405bd6fbc6407a02 SHA-1: ff952a37a99023011672052b1905491f901fbb2f SHA-256: d4d0979b976ff5c27d0298fe5357de40aab0242b2c40fbebcd3434e8998c226c
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File

The PDF contains a large number of external links, many of which are presented as download opportunities for game hacks and cheats. The ML classifier strongly indicated maliciousness, and the presence of numerous links to potentially unwanted or malicious content suggests a lure for users to download further malware. The document body and extracted URLs directly support this phishing and malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • 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.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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.co/app/431946152/how-to-get-free-robux-in-real-life-game-hack
    • http://achauco.vn/public/upload/files/minecraft-pe-hacked-client-download_GM479516143.pdf
    • http://achauco.vn/public/upload/files/how-to-scam-on-roblox_GM431946152.pdf
    • http://achauco.vn/public/upload/files/roblox-battle-royale-hack_GM431946152.pdf
    • http://achauco.vn/public/upload/files/free-robux-generator-for-roblox-2021_GM431946152.pdf
    • http://achauco.vn/public/upload/files/https-iosgodscom-topic-20214coinmasterhack_GM406889139.pdf
    • http://achauco.vn/public/upload/files/is-there-a-way-to-get-minecraft-for-free_GM479516143.pdf
    • http://achauco.vn/public/upload/files/hacks-de-roblox-para-cualquier-los-juegos_GM431946152.pdf
    • http://achauco.vn/public/upload/files/how-to-hack-roblox-admin-commands-2021_GM431946152.pdf
    • http://achauco.vn/public/upload/files/free-roblox-hacker-app_GM431946152.pdf
    • http://achauco.vn/public/upload/files/free-robux-generator-no-survey_GM431946152.pdf
    • http://achauco.vn/public/upload/files/wild-and-free-id-roblox-code_GM431946152.pdf
    • http://achauco.vn/public/upload/files/free-robux-without-survey_GM431946152.pdf
    • http://achauco.vn/public/upload/files/free-spins-coin-master-2021_GM406889139.pdf
    • http://achauco.vn/public/upload/files/how-to-get-minecraft-for-free-2021_GM479516143.pdf
    • http://achauco.vn/public/upload/files/free-game-packs-for-coin-master_GM406889139.pdf
    • http://achauco.vn/public/upload/files/roblox-town-factory-cheats_GM431946152.pdf
    • http://achauco.vn/public/upload/files/robux-hack-generator_GM431946152.pdf
    • http://achauco.vn/public/upload/files/how-to-hack-golden-card-in-coin-master_GM406889139.pdf
    • http://achauco.vn/public/upload/files/free-roblox-accounts-2021-may_GM431946152.pdf
    • http://achauco.vn/public/upload/files/free-robux-works-no-surveys-no-human-verification-code_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002fb3.bin
42ee98926948238ca758327ea7f247d44f8de24313de9d0a5bccf4560dea15be
pdf-font-stream PDF embedded font (sfnt) at offset 0x2FB3 21988 bytes
font_01_sfnt_off0000603f.bin
8ba7fd6ba707c29bc99f280e06c2ec2788e05dca9948a03a91b4c9f9855811cc
pdf-font-stream PDF embedded font (sfnt) at offset 0x603F 19180 bytes