Malicious PDF — malware analysis report

Static analysis result for SHA-256 7062ba96d4364567…

MALICIOUS

PDF

41.3 KB Created: 2021-05-14 18:48:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: c2cc0e327f9f1c670da6bd7a7aed78f5 SHA-1: 305d44b489245462e6def791b98388910e26f6d8 SHA-256: 7062ba96d43645672a8d0b28ca9865b5b811796e3b03e9d3e578228db7e7a91a
130 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to a "free generator / game hack" lure. The document body and embedded artifacts reinforce this by displaying similar text and the malicious URL. This indicates a social engineering attempt to trick users into visiting a potentially harmful site, which is likely a precursor to further malicious activity.

Machine Learning

  • Nyx PDF Classifier clean score 0.0125

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-back-accessories-roblox-game-hack In PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00003696.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3696 27172 bytes
SHA-256: 3d5c054eac786de61ef763000ec248b407233a4b12ba15b36f3e9f1fe38f13ca
font_01_sfnt_off000075a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x75A2 2912 bytes
SHA-256: 02b35010e2614e3cc95ac6414c49295350c91fdfcc4b4cad27ffdbc10e80df7f
font_02_sfnt_off00007f9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F9F 18468 bytes
SHA-256: ed1381c69922638ba3deea165f9c97413a9991048cfb55badf94070f5a9fa8be

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