Malicious PDF — malware analysis report

Static analysis result for SHA-256 51f037735f5ed62a…

MALICIOUS

PDF

45.0 KB Created: 2021-05-20 00:02:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 3a81a83957c81a0066a472745db995b6 SHA-1: 9d5ba5ccc6246f33f499819e04758b40575bbefe SHA-256: 51f037735f5ed62a6b2d3ae011b0ebbb26746f2e5ea07fe57c2acb1db7ee97b8
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document employs a common lure of 'game hacks' and 'free spins' to trick users into clicking embedded links. The primary link directs to a known malicious redirector infrastructure, which in turn hosts further malicious PDFs. The ML classifier also flagged this document as malicious, supporting the observed malicious redirection behavior.

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-daily-free-spin-and-coin-link-haktuts-game-hack In PDF document text
    • http://demenagementlandry.com/images/moonactive-coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • http://demenagementlandry.com/images/coin-mast-hacks_GM406889139.pdfIn PDF document text
    • http://demenagementlandry.com/images/promo-codes-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://demenagementlandry.com/images/pokemon-go-free-zaragoza_GM1094591345.pdfIn PDF document text
    • http://demenagementlandry.com/images/coin-master-free-blogspot_GM406889139.pdfIn PDF document text
    • http://demenagementlandry.com/images/hack-version-of-coin-master-apk-download_GM406889139.pdfIn PDF document text
    • http://demenagementlandry.com/images/coin-master-facebook-free-spins_GM406889139.pdfIn PDF document text
    • http://demenagementlandry.com/images/how-to-hack-minecraft_GM479516143.pdfIn PDF document text
    • http://demenagementlandry.com/images/games-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://demenagementlandry.com/images/free-spin-link-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://demenagementlandry.com/images/coin-master-hack-2021-iphone_GM406889139.pdfIn PDF document text
    • http://demenagementlandry.com/images/coin-master-free-2021-spin-link-today_GM406889139.pdfIn PDF document text
    • http://demenagementlandry.com/images/robux-adder_GM431946152.pdfIn PDF document text
    • http://demenagementlandry.com/images/how-to-hack-coin-master-with-game-guardian_GM406889139.pdfIn PDF document text
    • http://demenagementlandry.com/images/free-robux-generator_GM431946152.pdfIn PDF document text
    • http://demenagementlandry.com/images/coin-master-free-cards_GM406889139.pdfIn PDF document text
    • http://demenagementlandry.com/images/coin-master-free-spins-deutsch-download-2021-link_GM406889139.pdfIn PDF document text
    • http://demenagementlandry.com/images/free-robux-safe_GM431946152.pdfIn PDF document text
    • http://demenagementlandry.com/images/minecraft-reach-hack_GM479516143.pdfIn PDF document text
    • http://demenagementlandry.com/images/robux-generator-without-human-verification_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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000048b6.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x48B6 25000 bytes
SHA-256: f3c726276a4e02a253d512279638a8d354875686b9cc886d1ea2585f4bc9916c
font_01_sfnt_off0000821f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x821F 2840 bytes
SHA-256: 3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676
font_02_sfnt_off00008bd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8BD1 18792 bytes
SHA-256: 6ff184d88c7edc501ccd8c43f711d8b4a31af9e5613917888831e6fd5fbfeb68

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