Malicious PDF — malware analysis report

Static analysis result for SHA-256 8160372712925c99…

MALICIOUS

PDF

38.5 KB Created: 2021-05-23 16:03:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 93425a269e69d7eba74b8e46d1144912 SHA-1: 29bd07e4f24c851469c5564b43afec04df810457 SHA-256: 8160372712925c991ddd18e34ef46201d8d219f650204c27d95ff5651f851460
160 Risk Score

Malware Insights

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

This PDF document employs a lure of 'free Robux' and 'game hacks' to entice users to click on embedded links. The primary link redirects to known malicious infrastructure, indicating a phishing or scam attempt. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to exploit vulnerabilities or redirect users to malicious sites, likely for credential harvesting or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9476

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/431946152/free-robux-no-human-verification-or-survey-game-hack In PDF document text
    • https://www.linzgau-kjh.de/images/free-robux-generator-com-roblox-hack_GM431946152.pdfIn PDF document text
    • https://www.linzgau-kjh.de/images/free-spins-and-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://www.linzgau-kjh.de/images/how-to-get-1-million-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • https://www.linzgau-kjh.de/images/coin-master-free-spins-promo-code_GM406889139.pdfIn PDF document text
    • https://www.linzgau-kjh.de/images/haktuts-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off000031b0.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x31B0 29096 bytes
SHA-256: 920596536ec6f0291f5fdc1e4ceaf6bf30f70d0fa818dc12f8ef248a9cd5743a
font_01_sfnt_off00007287.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7287 19156 bytes
SHA-256: 67fe8f54727a48f1cd96414783693fce3a40c8eaba0da55a0542d393d9c1d7aa

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