Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb548ab5b83c034c…

MALICIOUS

PDF

46.4 KB Created: 2021-05-13 14:08:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 62b229eb1e6f6075e913359842aadbe9 SHA-1: 09bf77f98952aaf49bc0887d68b2976e1c7f9237 SHA-256: bb548ab5b83c034cc31e8aa27f2ac629a673b5e4e6a0bebcadfef15e27f96ce0
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to redirector domains, specifically advertising "game hacks" and "rewards generators" for popular games. The primary redirector URL is https://netcdn.xyz/app/406889139/coinmaster-rewards-game-hack, which is flagged as malicious. The document body, though partially obfuscated, also contains this URL and other links to potentially malicious PDF files hosted on bvmg.nl. No scripts were extracted, but the presence of malicious links and the lure suggest a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8948

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/coinmaster-rewards-game-hack In PDF document text
    • http://bvmg.nl/images/free-roblox-hair-codes_GM431946152.pdfIn PDF document text
    • http://bvmg.nl/images/roblox-hack-ios_GM431946152.pdfIn PDF document text
    • http://bvmg.nl/images/free-robux-codes-generator_GM431946152.pdfIn PDF document text
    • http://bvmg.nl/images/coin-master_GM406889139.pdfIn PDF document text
    • http://bvmg.nl/images/how-to-get-free-robux-on-iphone_GM431946152.pdfIn PDF document text
    • http://bvmg.nl/images/free-robux-site_GM431946152.pdfIn PDF document text
    • http://bvmg.nl/images/roblox-place-rewards_GM431946152.pdfIn PDF document text
    • http://bvmg.nl/images/2021-free-spins-coin-master-link_GM406889139.pdfIn PDF document text
    • http://bvmg.nl/images/coin-master-free-items_GM406889139.pdfIn PDF document text
    • http://bvmg.nl/images/coin-master-stop-attack-hack_GM406889139.pdfIn PDF document text
    • http://bvmg.nl/images/free-coins-coin-master_GM406889139.pdfIn PDF document text
    • http://bvmg.nl/images/minecraft-texture-packs-free-download_GM479516143.pdfIn PDF document text
    • http://bvmg.nl/images/free-robux-scams_GM431946152.pdfIn PDF document text
    • http://bvmg.nl/images/daily-free-spin-link-in-coin-master_GM406889139.pdfIn PDF document text
    • http://bvmg.nl/images/freespincoin-masterlinkdownload_GM406889139.pdfIn PDF document text
    • http://bvmg.nl/images/free-spin-generator-for-coin-master_GM406889139.pdfIn PDF document text
    • http://bvmg.nl/images/coin-master-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • http://bvmg.nl/images/how-to-get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://bvmg.nl/images/free-robux-without-offers_GM431946152.pdfIn PDF document text
    • http://bvmg.nl/images/coin-master-free-spins-link_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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004919.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4919 24972 bytes
SHA-256: 1db38744c9e8a41165518bf7752673988d27265d6c377ea168199091f041cd87
font_01_sfnt_off00008142.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8142 7332 bytes
SHA-256: d811e0aca85f3b94c42cd1240eec68b8eb378f3d8be5e408d3f6abd0f11f834d
font_02_sfnt_off0000935b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x935B 18144 bytes
SHA-256: 3304910cf416930b47305d75e02d2266dd9cc93df9b4dcfa32843af2f30c9813

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