Malicious PDF — malware analysis report

Static analysis result for SHA-256 791af574daf2c6e5…

MALICIOUS

PDF

35.5 KB Created: 2021-06-19 15:23:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 6020406b6e107b42e9941f61ace1f9dd SHA-1: 8c5ccee3ca2abc04a52396dc9ce625a309b38ce1 SHA-256: 791af574daf2c6e5d08c6cadb4ec48b70a7ea68e9c676497802e035cb8bd840f
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links and embedded text related to hacking and obtaining free in-game currency for Roblox, strongly suggesting a phishing or malware distribution lure. The presence of a link farm heuristic indicates a large number of external links designed to direct users to potentially malicious content. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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 http://netcdn.co/app/431946152/roblox-redeem-card-hack-pin-game-hack PDF link annotation
    • http://pia2000.net/images/how-to-hack-roblox-june-2021_GM431946152.pdfIn PDF document text
    • http://pia2000.net/images/roblox-help-someone-hacked-me_GM431946152.pdfIn PDF document text
    • http://pia2000.net/images/how-to-get-unlimited-dna-using-cheat-engine-roblox_GM431946152.pdfIn PDF document text
    • http://pia2000.net/images/free-robux-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • http://pia2000.net/images/roblox-email-hack_GM431946152.pdfIn PDF document text
    • http://pia2000.net/images/how-to-teleport-hack-in-roblox-jailbreak-2021-download_GM431946152.pdfIn PDF document text
    • http://pia2000.net/images/how-to-get-free-likes-on-tiktok_GM835599320.pdfIn PDF document text
    • http://pia2000.net/images/free-robux-giveaway_GM431946152.pdfIn PDF document text
    • http://pia2000.net/images/free-robux-no-playing-games-or-human-verification_GM431946152.pdfIn PDF document text
    • http://pia2000.net/images/counter-blox-roblox-offensive-wall-hack_GM431946152.pdfIn PDF document text
    • http://pia2000.net/images/goku-ui-free-roblox-skin_GM431946152.pdfIn PDF document text
    • http://pia2000.net/images/coin-master-free-spins-link-deutsch-ios_GM406889139.pdfIn PDF document text
    • http://pia2000.net/images/coin-master-free-spins-and-coins-daily-links_GM406889139.pdfIn PDF document text
    • http://pia2000.net/images/roblox-cheat-engine-64-free-download_GM431946152.pdfIn PDF document text
    • http://pia2000.net/images/blogger-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://pia2000.net/images/roblox-working-strucid-aimbot-hack-2021-agust_GM431946152.pdfIn PDF document text
    • http://pia2000.net/images/free-coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • http://pia2000.net/images/roblox-free-body_GM431946152.pdfIn PDF document text
    • http://pia2000.net/images/robux-hacks-2021_GM431946152.pdfIn PDF document text
    • http://pia2000.net/images/coin-master-free-spin-and-coins-links-2021_GM406889139.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
font_00_sfnt_off0000319e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x319E 22836 bytes
SHA-256: 612a3067857e2672aa1e4ecfe23e9a62ed1e32822adb1306eb08472aceea07ab
font_01_sfnt_off000064de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64DE 19364 bytes
SHA-256: ef2c77e68da28f0b63c8ef2fb2d3431f2951fa9157fe5aacf8d3cf9c95f7dce7

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