Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7e96ffa0b206dc2…

MALICIOUS

PDF

46.4 KB Created: 2021-05-14 14:00:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: d29d0ce2e11014d12920204284416418 SHA-1: 71ab80008afa52459b0e44912e68cf013ba56832 SHA-256: f7e96ffa0b206dc2ac01e95341535b03ae361cdcec43815982862b30488014e3
160 Risk Score

Malware Insights

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

The PDF contains multiple links pointing to malicious redirector infrastructure, specifically advertising 'Roblox Got Talent Piano Hack' and 'free generator' lures. These links ultimately lead to URLs hosted on netcdn.xyz and businessfit.com, which are associated with malicious redirector activity. The document body explicitly contains phrases like 'CLICK HERE TO ACCESS ROBLOX GENERATOR', indicating a social engineering attempt to trick users into clicking the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9425

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/roblox-got-talent-piano-hack-game-hack In PDF document text
    • http://businessfit.com/images/robux-gift-card-free_GM431946152.pdfIn PDF document text
    • http://businessfit.com/images/giftrobux-com-generator_GM431946152.pdfIn PDF document text
    • http://businessfit.com/images/how-to-get-free-roblox-gift-cards_GM431946152.pdfIn PDF document text
    • http://businessfit.com/images/roblox-gift-card-for-free_GM431946152.pdfIn PDF document text
    • http://businessfit.com/images/free-robux-gift-card_GM431946152.pdfIn 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_off00003b89.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3B89 40560 bytes
SHA-256: 4acc5aafaed5f3d3adda978bd4a369d0f9b4667aabac9df239fd1077ab8b8421
font_01_sfnt_off000093a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x93A9 18560 bytes
SHA-256: 718cc2b062ab6cfaeb2a411bf3639d4ddcb64813a44b35fc4dc4c297fc3c3153

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