Malicious PDF — malware analysis report

Static analysis result for SHA-256 853918a2ba9ed397…

MALICIOUS

PDF

35.3 KB Created: 2021-07-04 10:29:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: d92400813d8a319e328f3734405edbb6 SHA-1: cfd90798a77eb9b8eab338441621ca23e4cdc90e SHA-256: 853918a2ba9ed3974f7ab0acfdc22584c516eaea0278ba78dc0b58d0e7d46b1d
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure of free game currency and hacks to trick users into clicking malicious links. It contains numerous links to redirectors and SEO link farms, including http://netcdn.tw/app/431946152/codes-to-get-free-robux-game-hack, which is flagged as a malicious redirector. The document body and heuristics indicate a phishing or scam attempt, likely designed to lead users to further malicious content or potentially download unwanted software.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • 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 http://netcdn.tw/app/431946152/codes-to-get-free-robux-game-hack In PDF document text
    • https://gaushalango.com/uploaded_files/userfiles/files/free-paypal-accounts-with-money-for-roblox-with-card-code_GM431946152.pdfIn PDF document text
    • https://gaushalango.com/uploaded_files/userfiles/files/how-to-get-minecoins-in-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://gaushalango.com/uploaded_files/userfiles/files/robux-hack-console_GM431946152.pdfIn PDF document text
    • https://gaushalango.com/uploaded_files/userfiles/files/free-coins-coin-master-link-2021_GM406889139.pdfIn PDF document text
    • https://gaushalango.com/uploaded_files/userfiles/files/how-to-change-your-username-on-roblox-for-free-2021_GM431946152.pdfIn PDF document text
    • https://gaushalango.com/uploaded_files/userfiles/files/games-that-give-free-robux_GM431946152.pdfIn PDF document text
    • https://gaushalango.com/uploaded_files/userfiles/files/coin-master-free-spin-and-coin-links_GM406889139.pdfIn PDF document text
    • https://gaushalango.com/uploaded_files/userfiles/files/how-to-get-minecraft-for-free-on-computer_GM479516143.pdfIn PDF document text
    • https://gaushalango.com/uploaded_files/userfiles/files/roblox-source_GM431946152.pdfIn PDF document text
    • https://gaushalango.com/uploaded_files/userfiles/files/coin-master-free-coins-link_GM406889139.pdfIn PDF document text
    • https://gaushalango.com/uploaded_files/userfiles/files/coin-master-hack-tuts_GM406889139.pdfIn PDF document text
    • https://gaushalango.com/uploaded_files/userfiles/files/roblox-hack-2021_GM431946152.pdfIn PDF document text
    • https://gaushalango.com/uploaded_files/userfiles/files/roblox-programmer-tycoon-free-super-vip_GM431946152.pdfIn PDF document text
    • https://gaushalango.com/uploaded_files/userfiles/files/coin-master-latest-mod-apk-free-download_GM406889139.pdfIn PDF document text
    • https://gaushalango.com/uploaded_files/userfiles/files/how-to-look-cool-in-roblox-for-free_GM431946152.pdfIn PDF document text
    • https://gaushalango.com/uploaded_files/userfiles/files/free-robux-no-human-verification-or-survey-or-download-2021_GM431946152.pdfIn PDF document text
    • https://gaushalango.com/uploaded_files/userfiles/files/free-mods-for-minecraft-pe_GM479516143.pdfIn PDF document text
    • https://gaushalango.com/uploaded_files/userfiles/files/coin-master-free-spins-link-2021-iphone_GM406889139.pdfIn PDF document text
    • https://gaushalango.com/uploaded_files/userfiles/files/play-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://gaushalango.com/uploaded_files/userfiles/files/free-robux-generator-no-human-verification_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
font_00_sfnt_off00003238.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3238 22732 bytes
SHA-256: 61157d5eb4a001adcde5566128c2115d7d991bb28833da627d5c7dd25fd046f3
font_01_sfnt_off00006516.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6516 18996 bytes
SHA-256: dae15d86f19837a25368e9980f7c547d0fc236531c79ecd70a0408dcd8fbc7fb

Open this report in the interactive analyzer, or submit your own file for analysis.