Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc8c8e12609816f4…

MALICIOUS

PDF

46.2 KB Created: 2021-05-11 03:30:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 6b9d4300b86134f1ef038ddf3d6826a4 SHA-1: 3561b1eeebb290ff39101d51e9d3b8cb6dc9d1df SHA-256: dc8c8e12609816f4abf9c6761dca83f25c7fe4f10070c4173034c2ed6e510646
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors and lures users with promises of game hacks. The embedded URLs and the document's content strongly suggest a social engineering attack aimed at tricking users into visiting malicious sites. While no scripts were explicitly extracted, the nature of the links and the heuristic firings indicate a high likelihood of a malicious redirector chain.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9432

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-september-2021-game-hack In PDF document text
    • http://maxvanberchem.org/images/minecraft-alt-accounts-free_GM479516143.pdfIn PDF document text
    • http://maxvanberchem.org/images/how-to-get-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • http://maxvanberchem.org/images/free-robux-no-verification-needed_GM431946152.pdfIn PDF document text
    • http://maxvanberchem.org/images/robux-website_GM431946152.pdfIn PDF document text
    • http://maxvanberchem.org/images/coin-master-free-spin-software_GM406889139.pdfIn PDF document text
    • http://maxvanberchem.org/images/coin-master-hack-apk-no-survey_GM406889139.pdfIn PDF document text
    • http://maxvanberchem.org/images/free-robux-codes-not-used_GM431946152.pdfIn PDF document text
    • http://maxvanberchem.org/images/coin-master-hack-version-33-2_GM406889139.pdfIn PDF document text
    • http://maxvanberchem.org/images/how-to-make-robux_GM431946152.pdfIn PDF document text
    • http://maxvanberchem.org/images/how-to-hack-coin-master-with-lucky-patcher_GM406889139.pdfIn PDF document text
    • http://maxvanberchem.org/images/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://maxvanberchem.org/images/free-coin-master-links_GM406889139.pdfIn PDF document text
    • http://maxvanberchem.org/images/how-do-you-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://maxvanberchem.org/images/free-robux-no-verification-no-download-2021_GM431946152.pdfIn PDF document text
    • http://maxvanberchem.org/images/how-to-get-free-hair-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://maxvanberchem.org/images/roblox-catalog-free_GM431946152.pdfIn PDF document text
    • http://maxvanberchem.org/images/free-robux-without-human-verification-real_GM431946152.pdfIn PDF document text
    • http://maxvanberchem.org/images/wurst-hacks_GM479516143.pdfIn PDF document text
    • http://maxvanberchem.org/images/free-spins-generated-from-coin-master_GM406889139.pdfIn PDF document text
    • http://maxvanberchem.org/images/www-coinmaster-com_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_off00004b2e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B2E 25268 bytes
SHA-256: ba131b8c98cb2c075ae79c5b99f270403935bf09757ec57978bbe865b5f8f196
font_01_sfnt_off00008415.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8415 3560 bytes
SHA-256: c953d730e49f69c7d62e02a926729ae4a31de13d9a976dc4a95b39cf47066c93
font_02_sfnt_off0000909b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x909B 18712 bytes
SHA-256: ec94bbdb55868be7ab868d7adbfcd7ec6eb1b1ec326d6066069fc7776a0707e1

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