Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c832a2146f4fa1e…

MALICIOUS

PDF

42.1 KB Created: 2021-05-11 21:51:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 755624a50a556a635df190a94905abb7 SHA-1: 84b0a215ed28cac8369719108da3863196624b26 SHA-256: 6c832a2146f4fa1e6ce76b4d97b1c7d16d021b490b8f71a7c3c236049f520efe
260 Risk Score

Malware Insights

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

This PDF document employs a common lure of free in-game items and currency to trick users into clicking malicious links. It presents a fake CAPTCHA or human verification prompt, a tactic designed to coerce users into executing commands or interacting with the malicious content. The document contains numerous links to external PDFs and a primary redirector URL, indicating a phishing or scam campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 6

  • 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.
  • 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.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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-outfits-on-roblox-game-hack In PDF document text
    • http://professionalpilottraining.com.au/images/free-robux-no-verification-no-download-2021_GM431946152.pdfIn PDF document text
    • http://professionalpilottraining.com.au/images/coin-master-free-spins-haktuts_GM406889139.pdfIn PDF document text
    • http://professionalpilottraining.com.au/images/rbxoffers-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://professionalpilottraining.com.au/images/how-can-i-get-free-robux_GM431946152.pdfIn PDF document text
    • http://professionalpilottraining.com.au/images/coin-master-hack-without-verification-2021_GM406889139.pdfIn PDF document text
    • http://professionalpilottraining.com.au/images/coin-master-hack-tool-no-survey_GM406889139.pdfIn PDF document text
    • http://professionalpilottraining.com.au/images/coin-master-free_GM406889139.pdfIn PDF document text
    • http://professionalpilottraining.com.au/images/apps-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://professionalpilottraining.com.au/images/coin-master-mod-version-free-download_GM406889139.pdfIn PDF document text
    • http://professionalpilottraining.com.au/images/free-roblox-wings_GM431946152.pdfIn PDF document text
    • http://professionalpilottraining.com.au/images/no-robux_GM431946152.pdfIn PDF document text
    • http://professionalpilottraining.com.au/images/roblox-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • http://professionalpilottraining.com.au/images/synapse-roblox-free_GM431946152.pdfIn PDF document text
    • http://professionalpilottraining.com.au/images/mobihack-roblox-hack_GM431946152.pdfIn PDF document text
    • http://professionalpilottraining.com.au/images/how-to-get-free-food-for-foxy-in-coin-master_GM406889139.pdfIn PDF document text
    • http://professionalpilottraining.com.au/images/free-robux-gift-card-generator_GM431946152.pdfIn PDF document text
    • http://professionalpilottraining.com.au/images/free-coins-coin-master-link_GM406889139.pdfIn PDF document text
    • http://professionalpilottraining.com.au/images/make-your-own-minecraft-server-free_GM479516143.pdfIn PDF document text
    • http://professionalpilottraining.com.au/images/coin-master-hack-tool-generator_GM406889139.pdfIn PDF document text
    • http://professionalpilottraining.com.au/images/cool-free-minecraft-skins_GM479516143.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_off00004a2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4A2A 24548 bytes
SHA-256: 4cebd2611937e70fd06c7938429dd4aa4ed06e0f4412f1d5413de7aeea06c0aa
font_01_sfnt_off00008188.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8188 18476 bytes
SHA-256: 4c550287b1f7582f932e33e2a3ce93633f0afb7f6cd43646c0383227d45fb2b9

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