Malicious PDF — malware analysis report

Static analysis result for SHA-256 652d1619d220f255…

MALICIOUS

PDF

45.7 KB Created: 2021-05-14 11:31:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 1a15829dc29e935778702163d957b2d6 SHA-1: 22c22ae3a303b99ad5ff56106fdd3204a7f1b003 SHA-256: 652d1619d220f25538c34d305458247c7c71d23e4b641858bb7f2fc22ac307f3
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file 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 0.9507

Heuristics 4

  • 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/406889139/coin-master-fan-page-free-spins-game-hack PDF link annotation
    • http://aviaprofsoyuz.info/images/free-coin-master-spins-blogger_GM406889139.pdfIn PDF document text
    • http://aviaprofsoyuz.info/images/free-hacks-for-coin-master_GM406889139.pdfIn PDF document text
    • http://aviaprofsoyuz.info/images/coin-master-fan-page-giveaway_GM406889139.pdfIn PDF document text
    • http://aviaprofsoyuz.info/images/minecraft-pocket-edition-mods-for-free_GM479516143.pdfIn PDF document text
    • http://aviaprofsoyuz.info/images/free-roblox-accounts-dantdm_GM431946152.pdfIn PDF document text
    • http://aviaprofsoyuz.info/images/roblox-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://aviaprofsoyuz.info/images/how-to-get-free-robux-without-verifying-2021_GM431946152.pdfIn PDF document text
    • http://aviaprofsoyuz.info/images/how-to-get-free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://aviaprofsoyuz.info/images/roblox-free-draw_GM431946152.pdfIn PDF document text
    • http://aviaprofsoyuz.info/images/coin-master-hack-app-ios_GM406889139.pdfIn PDF document text
    • http://aviaprofsoyuz.info/images/toolbox-premium-apk_GM479516143.pdfIn PDF document text
    • http://aviaprofsoyuz.info/images/coin-master-online-hack_GM406889139.pdfIn PDF document text
    • http://aviaprofsoyuz.info/images/free-robux-by-watching-ads_GM431946152.pdfIn PDF document text
    • http://aviaprofsoyuz.info/images/free-robux-kid-friendly-no-human-verification_GM431946152.pdfIn PDF document text
    • http://aviaprofsoyuz.info/images/25-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://aviaprofsoyuz.info/images/master-coin-hack_GM406889139.pdfIn PDF document text
    • http://aviaprofsoyuz.info/images/minecraft-java-edition-free-trial_GM479516143.pdfIn PDF document text
    • http://aviaprofsoyuz.info/images/coin-master-fun-hack_GM406889139.pdfIn PDF document text
    • http://aviaprofsoyuz.info/images/free-chest-coin-master_GM406889139.pdfIn PDF document text
    • http://aviaprofsoyuz.info/images/free-robux-generator-com-roblox-hack_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0000495a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x495A 26344 bytes
SHA-256: 4a6557a6a6e993b55ef355f0268299207cdc6504633d3a4b54c7ce4710c7cf76
font_01_sfnt_off00008630.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8630 2840 bytes
SHA-256: 3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676
font_02_sfnt_off00008fe1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8FE1 18328 bytes
SHA-256: d106028e9c816c4ed38d7f9dbfb4c1b42a2571be69ef627f7b4a635c4c6a8b94