Malicious PDF — malware analysis report

Static analysis result for SHA-256 70494fe453ac44d6…

MALICIOUS

PDF

55.9 KB Created: 2021-05-13 19:34:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 1553e32dbd888c9ffefae780f7c18075 SHA-1: e155fe879eb19ab04533a6f16035bbf42c2eb07e SHA-256: 70494fe453ac44d623bb3a45eb31b3a785f6504edd69061df86f0067988b4128
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 0.9400

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/roblox-free-robux-no-human-verification-game-hack PDF link annotation
    • http://precitool.ch/images/get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://precitool.ch/images/coin-master-free-spins-uk_GM406889139.pdfIn PDF document text
    • http://precitool.ch/images/coin-master-hack-pc-cheat-engine_GM406889139.pdfIn PDF document text
    • http://precitool.ch/images/coin-master-hack-apk-july-29_GM406889139.pdfIn PDF document text
    • http://precitool.ch/images/claimrbx-free-robux_GM431946152.pdfIn PDF document text
    • http://precitool.ch/images/hack-coin-master-apk-358_GM406889139.pdfIn PDF document text
    • http://precitool.ch/images/how-to-hack-peoples-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://precitool.ch/images/simplysarc_GM479516143.pdfIn PDF document text
    • http://precitool.ch/images/coin-master-free-spin-app-reviews_GM406889139.pdfIn PDF document text
    • http://precitool.ch/images/how-to-get-free-roebucks-in-roblox_GM431946152.pdfIn PDF document text
    • http://precitool.ch/images/free-coins-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://precitool.ch/images/how-to-earn-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://precitool.ch/images/how-to-get-20210-robux-for-free_GM431946152.pdfIn PDF document text
    • http://precitool.ch/images/free-robux-no-human-verification-and-no-survey_GM431946152.pdfIn PDF document text
    • http://precitool.ch/images/microsoft-robux_GM431946152.pdfIn PDF document text
    • http://precitool.ch/images/coin-master-free-spins-link-blogspot-2021_GM406889139.pdfIn PDF document text
    • http://precitool.ch/images/how-to-hack-people-on-roblox_GM431946152.pdfIn PDF document text
    • http://precitool.ch/images/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://precitool.ch/images/minecraft-pe-hacks_GM479516143.pdfIn PDF document text
    • http://precitool.ch/images/coin-master-hack-2021-android-apk_GM406889139.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004b53.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B53 43948 bytes
SHA-256: bff6f2a884c4ecf33e45eba8233925dbc7edc06c293ee4fa27a4e194eeefc9db
font_01_sfnt_off0000a9f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA9F9 5696 bytes
SHA-256: 450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139
font_02_sfnt_off0000b70b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB70B 18932 bytes
SHA-256: 9d302b82f438100f3cf39adb1b208b926e457e77310e02e89ba7e0c774768e38

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