Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ea0e9043d6e7de1…

MALICIOUS

PDF

42.3 KB Created: 2021-05-16 01:03:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 0fa27ee34e3b759357be139ef61ca050 SHA-1: 522e3a7e03f6318c8d8cc5be54affb6b1f799dbb SHA-256: 1ea0e9043d6e7de105a1373c2bbed4ad3a1f9d3106273f2cce2fa6614aff71ab
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to a redirector URL associated with 'free generator' lures, indicating a phishing or scam attempt. The document body and heuristics confirm the presence of these malicious links, aiming to trick users into visiting potentially harmful websites. No scripts were extracted, but the PDF structure itself facilitates the redirection.

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/how-to-get-free-robux-easy-2021-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_off000034f2.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x34F2 27576 bytes
SHA-256: 4b3097729830c8e02d82ab90a19913e9581ad55ddf144bbac217f72fb0f39794
font_01_sfnt_off00007474.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7474 3976 bytes
SHA-256: 57848eb92c35e95f83809eef0c7b0b75ab2bad648ed56989d1f98c652a079aef
font_02_sfnt_off00008162.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8162 19092 bytes
SHA-256: b4f5bd8c8985fe06cb8cafea7c6a35db41ab3230d9b691422e9309a9df735677

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