Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f7e2fec7249c0d0…

MALICIOUS

PDF

35.3 KB Created: 2021-05-12 12:17:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 470a9572fd8f348991bddeb9f61c69da SHA-1: ca759906e631bb8b735ad572e3bbc549a615a7e3 SHA-256: 1f7e2fec7249c0d0246963827d121b4c6cdc7098889809da36c60136e49060d8
130 Risk Score

Malware Insights

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

The PDF document contains a lure related to a game hack, directing users to a URL that has been flagged as a malicious redirector. The document body and heuristics indicate a social engineering attempt to trick users into visiting this malicious link, likely to download further malware or lead them to a phishing site. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier clean score 0.0306

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/how-to-get-free-cards-for-coin-master-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_off0000337a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x337A 23720 bytes
SHA-256: 0ff22b05c22fbaf047fb68ad3af934ca150490f14eb23be878b302db30f5ad25
font_01_sfnt_off0000693b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x693B 18048 bytes
SHA-256: c3f371278b7fe6873213599d15e2d537c4e536c02b9f7f2e86ee974651b3645e

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