Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a994d44e79ad8d3…

MALICIOUS

PDF

44.8 KB Created: 2021-05-13 21:45:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 6da4b1a72b09c5c24ee48d4e6c84148e SHA-1: 0d2e460f87dacb563141ab9316a67086424f8151 SHA-256: 7a994d44e79ad8d3c6b96e96fb1f0bd561992f2c39f0bba0e05a2ad43c74e792
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, disguised as 'game hack' generators. The document body and heuristics indicate a lure to download a potentially malicious file. No scripts were extracted, but the embedded URLs are highly suspicious and indicative of a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9632

Heuristics 4

  • 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.
  • 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 https://netcdn.xyz/app/406889139/coin-master-hack-version-download-2021-android-game-hack In PDF document text
    • http://sibileva.ru/images/free-robux-link_GM431946152.pdfIn PDF document text
    • http://sibileva.ru/images/coin-master-bonus_GM406889139.pdfIn PDF document text
    • http://sibileva.ru/images/free-robux-without-survey_GM431946152.pdfIn PDF document text
    • http://sibileva.ru/images/free-shields-coin-master_GM406889139.pdfIn PDF document text
    • http://sibileva.ru/images/coin-master-free-spins-apk_GM406889139.pdfIn PDF document text
    • http://sibileva.ru/images/coin-master-free-spin-link-today-2021_GM406889139.pdfIn PDF document text
    • http://sibileva.ru/images/free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://sibileva.ru/images/coin-master-hack-apk-33-download_GM406889139.pdfIn PDF document text
    • http://sibileva.ru/images/coin-master-free-spins-link-june-2021_GM406889139.pdfIn PDF document text
    • http://sibileva.ru/images/coin-master-hack-apk-ios_GM406889139.pdfIn PDF document text
    • http://sibileva.ru/images/hack-coin-master-no-human-verification_GM406889139.pdfIn PDF document text
    • http://sibileva.ru/images/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://sibileva.ru/images/coin-master-ios-hack_GM406889139.pdfIn PDF document text
    • http://sibileva.ru/images/free-spins-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://sibileva.ru/images/where-can-i-get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://sibileva.ru/images/free-minecraft-texture-packs_GM479516143.pdfIn PDF document text
    • http://sibileva.ru/images/freespinandcoin-blogspot-coin-master_GM406889139.pdfIn PDF document text
    • http://sibileva.ru/images/coin-master-free-spins-link-today-twitter_GM406889139.pdfIn PDF document text
    • http://sibileva.ru/images/how-to-get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://sibileva.ru/images/free-coin-and-spin-for-coin-master_GM406889139.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_off00004a32.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A32 24236 bytes
SHA-256: 051c91e4c2a3bd7178a6c9463cfd0262f0edd001e99a6f3b933cd854c081132c
font_01_sfnt_off0000808a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x808A 2880 bytes
SHA-256: 10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132
font_02_sfnt_off00008a74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A74 18832 bytes
SHA-256: cd0ec0ee3d6d2e78cc0295f59590dfb899d6956e54506a4c66f347aa13d8e697

Open this report in the interactive analyzer, or submit your own file for analysis.