Malicious PDF — malware analysis report

Static analysis result for SHA-256 9aa345e1fdba40e2…

MALICIOUS

PDF

43.1 KB Created: 2021-05-21 09:09:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 0fd22faf33e65d1c11f441e95e15efdd SHA-1: 817712609068b8663214bbb4c19d06a313783935 SHA-256: 9aa345e1fdba40e212da1d45b9333d9dcbacf855e3e1cdfd3e9b13217be19648
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded links that redirect to malicious infrastructure, specifically promoting "free Robux" and "game hacks". The ML classifier and heuristic firings strongly indicate malicious intent, likely to trick users into visiting compromised sites or downloading further malware. No scripts were extracted, but the document body and heuristics point to a social engineering lure for a scam or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7429

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-robux-real-game-hack In PDF document text
    • http://columbuscigar.com/images/hack-xp-net-coin-master_GM406889139.pdfIn PDF document text
    • http://columbuscigar.com/images/how-to-make-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://columbuscigar.com/images/how-to-hack-minecraft-pe_GM479516143.pdfIn PDF document text
    • http://columbuscigar.com/images/give-me-free-robux_GM431946152.pdfIn PDF document text
    • http://columbuscigar.com/images/how-to-get-free-robux-as-a-kid_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00003519.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3519 31520 bytes
SHA-256: 1cc97f3005769ec6653b996d4ac033bc267c329c8fc7b160ab2ad6ef59152b86
font_01_sfnt_off00007d8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D8E 2832 bytes
SHA-256: 77ae1c4cffa647a8fd533dfa4102e94364989f9e80b9cd131876e9d1005899a2
font_02_sfnt_off0000873f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x873F 18316 bytes
SHA-256: 0bff543ee19f4ca1641aaad3399cdc0a52c610caf2abd08cd8655404047fbeff

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