Malicious PDF — malware analysis report

Static analysis result for SHA-256 abef8be661ce6743…

MALICIOUS

PDF

35.2 KB Created: 2021-07-05 19:11:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: af1dad7632acedd28fb38b86b2d8869b SHA-1: 25ddcd1751de931fba0ce447433c012ec4dcbb77 SHA-256: abef8be661ce6743ab25724bb61fd3eb369995eb66497f0264158ecaff67d438
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting 'game hacks' and 'free generators'. The heuristic firings indicate these links are designed to lure users to potentially harmful sites. While no scripts were explicitly extracted, the nature of the links suggests a phishing or social engineering attack aimed at tricking users into visiting malicious domains, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/479516143/wurst-commands-game-hack In PDF document text
    • https://fib.ub.ac.id/sac/repository/how-to-get-free-robux-very-easy-and-fast_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/how-to-get-gold-cards-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/cheat-the-plaza-roblox_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/roblox-hack-robux-pastebin-octubre-2021_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/robux-hack-free-robux_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/hack-roblox-pc-2021_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/roblox-free-hoodie_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/codes-to-hack-roblox_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/robuxian-get-2021-free-robux-daily_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/free-minecraft-capes_GM479516143.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/free-robux-id-reedem_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/free-coins-for-flip-master_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/when-pokemon-go-free-will_GM1094591345.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/boombox-backpack-roblox-free_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/free-roblox-robux-generator-2021-without-human-verification_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/free-roblox-account-with-pin_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/my-free-robux_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/robux-hack-tools_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/free-roblox-bundles-2021_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/roblox-grab-the-child-hacks_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_off0000334b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x334B 22612 bytes
SHA-256: 209d97b2ec94d67ec8800687335df2b98bff295479a32d8ed123c59377958d21
font_01_sfnt_off000065d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65D1 18652 bytes
SHA-256: 2aa4b3a06f8f810455c2de55047681fbe1f4f7c5efd97b9b8db0efc9e0a5a8f6

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