Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad8a558fd969492b…

MALICIOUS

PDF

41.0 KB Created: 2021-05-16 23:31:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: fa3fc646b06e159b293d8d5693e8d203 SHA-1: 0c996e04121b1af486a03b8bc586a314e4e685ba SHA-256: ad8a558fd969492b53196da786ecaa6883998f7d6be0f794b01b7ce967e2153a
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded links that redirect to external URLs, masquerading as game hacks and generators. These links are flagged as malicious redirectors, indicating a phishing or malware distribution attempt. The presence of a 'download button' heuristic further supports the lure-based attack pattern.

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-spins-game-hack In PDF document text
    • http://drozle.lt/images/coin-master-free-spin-link-today-download_GM406889139.pdfIn PDF document text
    • http://drozle.lt/images/roblox-free-hair-boy_GM431946152.pdfIn PDF document text
    • http://drozle.lt/images/coin-master-free-coins-no-human-verification_GM406889139.pdfIn PDF document text
    • http://drozle.lt/images/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://drozle.lt/images/websites-for-robux_GM431946152.pdfIn PDF document text
    • http://drozle.lt/images/how-to-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://drozle.lt/images/roblox-free-robux_GM431946152.pdfIn PDF document text
    • http://drozle.lt/images/clients-minecraft_GM479516143.pdfIn PDF document text
    • http://drozle.lt/images/robux-no-survey_GM431946152.pdfIn PDF document text
    • http://drozle.lt/images/roblox-scam_GM431946152.pdfIn PDF document text
    • http://drozle.lt/images/roebucks-on-roblox_GM431946152.pdfIn PDF document text
    • http://drozle.lt/images/free-daily-coin-master-coins_GM406889139.pdfIn PDF document text
    • http://drozle.lt/images/free-robux-no-generator_GM431946152.pdfIn PDF document text
    • http://drozle.lt/images/how-to-get-free-robux-easy_GM431946152.pdfIn PDF document text
    • http://drozle.lt/images/oprewards-com-roblox_GM431946152.pdfIn PDF document text
    • http://drozle.lt/images/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://drozle.lt/images/free-robux-gift-card-generator_GM431946152.pdfIn PDF document text
    • http://drozle.lt/images/coin-master-spin-cheat_GM406889139.pdfIn PDF document text
    • http://drozle.lt/images/free-robux-no-scam_GM431946152.pdfIn PDF document text
    • http://drozle.lt/images/legit-coin-master-hack-october-2021_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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000047a5.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x47A5 24748 bytes
SHA-256: a263cc76a92167fbfaf7a60914aff058720e055f59a2941bc7e6dda747b90285
font_01_sfnt_off00007f4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F4D 17724 bytes
SHA-256: 9e6e11cb276c7dd66a19f48669c6f0c9fad7b2850a2ee7a5573e48fd717a5b28

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