Malicious PDF — malware analysis report

Static analysis result for SHA-256 3dc470ae459e1c64…

MALICIOUS

PDF

52.5 KB Created: 2021-05-17 11:09:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: c413fc3be7f43a1249c71a3df82e7301 SHA-1: e0e9fc292f287e956478bb5b9939500ff7c379c4 SHA-256: 3dc470ae459e1c64ec6791fd09ad7e0621b25780302c95118bf3c66b858364c1
142 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8646

Heuristics 5

  • 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.
  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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 https://netcdn.xyz/app/431946152/apps-to-get-free-robux-game-hack PDF link annotation
    • https://dirigentigiustizia.it/images/how-to-get-free-robux-on-iphone_GM431946152.pdfIn PDF document text
    • https://dirigentigiustizia.it/images/can-you-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://dirigentigiustizia.it/images/coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • https://dirigentigiustizia.it/images/coin-master-hack-xyz-apk-download_GM406889139.pdfIn PDF document text
    • https://dirigentigiustizia.it/images/real-robux-generator-2021_GM431946152.pdfIn PDF document text
    • https://dirigentigiustizia.it/images/how-to-duplicate-coin-master-spin-hack_GM406889139.pdfIn PDF document text
    • https://dirigentigiustizia.it/images/coin-master-free-spins-and-coins-blogspot_GM406889139.pdfIn PDF document text
    • https://dirigentigiustizia.it/images/free-roblox-groups_GM431946152.pdfIn PDF document text
    • https://dirigentigiustizia.it/images/free-coin-master-cheats_GM406889139.pdfIn PDF document text
    • https://dirigentigiustizia.it/images/mistplay-robux_GM431946152.pdfIn PDF document text
    • https://dirigentigiustizia.it/images/coin-master-hack-cheat-generator-d_GM406889139.pdfIn PDF document text
    • https://dirigentigiustizia.it/images/roblox-fun-com-free-robux_GM431946152.pdfIn PDF document text
    • https://dirigentigiustizia.it/images/moonactive-free-spins-link_GM406889139.pdfIn PDF document text
    • https://dirigentigiustizia.it/images/roblox-zone-free-robux_GM431946152.pdfIn PDF document text
    • https://dirigentigiustizia.it/images/codes-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://dirigentigiustizia.it/images/hack-coin-master-without-root_GM406889139.pdfIn PDF document text
    • https://dirigentigiustizia.it/images/free-bling-bling-card-coin-master_GM406889139.pdfIn PDF document text
    • https://dirigentigiustizia.it/images/hackear-coin-master-sin-verificacion_GM406889139.pdfIn PDF document text
    • https://dirigentigiustizia.it/images/hacks-and-cheats-for-coin-master_GM406889139.pdfIn PDF document text
    • https://dirigentigiustizia.it/images/no-scam-free-robux_GM431946152.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004852.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4852 32068 bytes
SHA-256: 33547db2c7e18188adffa9504196047dc429dc7b9ee78d5c8ef478b453ed20da
font_01_sfnt_off00009122.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9122 3884 bytes
SHA-256: 40b61f8938bd710dc29dc58ba3fde91c245a6a69596ec569b4d27c769ca417cf
font_02_sfnt_off00009dc5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9DC5 5696 bytes
SHA-256: 450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139
font_03_sfnt_off0000aad7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAAD7 18292 bytes
SHA-256: b4e5860ebf2343f9b18b94d86a305cbc7e8ebd2f2a6bfe7ceeed88b67548d8bf

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