Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce97f0b35b1957ec…

MALICIOUS

PDF

40.5 KB Created: 2021-05-21 08:50:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 95e4253a9ea989671258e9c6d1be6cd3 SHA-1: d58ba1dbb039815486beab2ccd20faf4226aadf6 SHA-256: ce97f0b35b1957ec1368d2b05d99a37c1ad52e930fadff0f619853046ef25699
160 Risk Score

Malware Insights

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

The PDF contains multiple links to redirectors, including one identified as malicious infrastructure. The document body and heuristics indicate a lure for game hacks and generators, aiming to trick users into visiting these malicious sites. While no scripts were directly extracted, the PDF structure and embedded links suggest a potential for exploitation or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7776

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/479516143/minecraft-dungeons-download-free-game-hack In PDF document text
    • http://www.museodopobo.gal/web/uploads/files/robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://www.museodopobo.gal/web/uploads/files/free-spins-on-coin-master-links-2021_GM406889139.pdfIn PDF document text
    • http://www.museodopobo.gal/web/uploads/files/unlimited-robux_GM431946152.pdfIn PDF document text
    • http://www.museodopobo.gal/web/uploads/files/coin-master-play-online-free_GM406889139.pdfIn PDF document text
    • http://www.museodopobo.gal/web/uploads/files/free-robux-images_GM431946152.pdfIn 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_002_off000034a9.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x34A9 26716 bytes
SHA-256: a08be3adb81df94ac4c262fa90edf40f41e427cf5a4f3dda7ce8525a6b80ad2f
font_01_sfnt_off00007190.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7190 2892 bytes
SHA-256: c2578a292634a901613c1dd9f9883dd4930e6811e59ae03d696f263e56ea17b4
font_02_sfnt_off00007b7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B7A 18720 bytes
SHA-256: 921efc7a282f70be8e45d9f485508adcbd6bee6f34856fa33b0668efabfdb805

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