Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ec20337b182ab18…

MALICIOUS

PDF

36.5 KB Created: 2021-05-11 06:35:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 36aa974d4c7feca54a0b1a0a77a16fb9 SHA-1: c56f44982a02687b39fb9f5ef1914eb07eabfdf6 SHA-256: 1ec20337b182ab185127974a1b9079e544c79daa67316835f0e8e845bdde5a5c
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a critical heuristic firing for a malicious redirector link, specifically pointing to a "roblox-arsenal-hack-game-hack" URL. This URL is designed to lure users with promises of game hacks, a common phishing tactic. The document body also contains the same URL and a call-to-action phrase, reinforcing the malicious intent. The presence of a callback lure heuristic suggests a potential for further social engineering or phishing.

Machine Learning

  • Nyx PDF Classifier clean score 0.0292

Heuristics 5

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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/roblox-arsenal-hack-game-hack In 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_003_off00002f90.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2F90 26888 bytes
SHA-256: cbc71d9b2cf1bdc3693e1e572fb2f828aba2393a79098e965b801b4f23a4f3cb
font_01_sfnt_off00006d6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D6F 18184 bytes
SHA-256: 950cb6c94e3217e8d5edf097fa87367098c5f84c9f1c4255a513a3effc23c56b

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