Malicious PDF — malware analysis report

Static analysis result for SHA-256 8cfd89403d666805…

MALICIOUS

PDF

42.4 KB Created: 2021-05-15 10:12:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 00cd409562f61101146be269efea2c59 SHA-1: 54d5d2ebe9868f5bfb18aa60af703e49f0e60558 SHA-256: 8cfd89403d6668058b6f3dd27a83f641d9fb0d8da998f862e2bbb308963ad4fa
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, including one that masquerades as a "free game hack" for Coin Master. The document body, though heavily obfuscated, contains references to game hacks and URLs that reinforce this lure. The presence of embedded URLs and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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-el-tiger-card-free-game-hack In PDF document text
    • http://geometraperiotto.it/images/no-scam-free-robux_GM431946152.pdfIn PDF document text
    • http://geometraperiotto.it/images/free-robux-hack_GM431946152.pdfIn PDF document text
    • http://geometraperiotto.it/images/codes-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://geometraperiotto.it/images/how-to-robux_GM431946152.pdfIn PDF document text
    • http://geometraperiotto.it/images/free-printable-minecraft-coloring-pages_GM479516143.pdfIn PDF document text
    • http://geometraperiotto.it/images/roblox-password-hacker_GM431946152.pdfIn PDF document text
    • http://geometraperiotto.it/images/links-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://geometraperiotto.it/images/mcpe-master-hack-unlimited-coins-download_GM406889139.pdfIn PDF document text
    • http://geometraperiotto.it/images/minecraft-cheats-switch_GM479516143.pdfIn PDF document text
    • http://geometraperiotto.it/images/coin-master-free-spin-and-trading_GM406889139.pdfIn PDF document text
    • http://geometraperiotto.it/images/free-robux-codes_GM431946152.pdfIn PDF document text
    • http://geometraperiotto.it/images/how-do-i-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://geometraperiotto.it/images/rewardrobux-com_GM431946152.pdfIn PDF document text
    • http://geometraperiotto.it/images/how-to-make-a-modded-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • http://geometraperiotto.it/images/hacks-for-minecraft-windows-10_GM479516143.pdfIn PDF document text
    • http://geometraperiotto.it/images/free-robux-safe_GM431946152.pdfIn PDF document text
    • http://geometraperiotto.it/images/free-promo-codes-for-robux_GM431946152.pdfIn PDF document text
    • http://geometraperiotto.it/images/free-robux-websites-no-human-verification_GM431946152.pdfIn PDF document text
    • http://geometraperiotto.it/images/how-to-hack-roblox-to-get-robux_GM431946152.pdfIn PDF document text
    • http://geometraperiotto.it/images/minecraft-pe-texture-packs-free-download_GM479516143.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004b0b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B0B 24920 bytes
SHA-256: 2177ceb4ac6fe00bc4cc5362be123182a50ef52a27f36ec3af7115e04f001272
font_01_sfnt_off00008342.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8342 18244 bytes
SHA-256: 62951dc56a4098348a942f01ff7d9064ef2b90491a118746803c45398ddf7514

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