Malicious PDF — malware analysis report

Static analysis result for SHA-256 2616febfc6ddda14…

MALICIOUS

PDF

44.7 KB Created: 2021-06-03 06:05:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-25
MD5: bf367b4542310738148aeb80fecc5d9f SHA-1: 8fedb09963b2dc888e3594a552dd2abd6836861a SHA-256: 2616febfc6ddda14ff4082d265a39a85075b1332b10888198da81bfbbdb16a75
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to redirector infrastructure, specifically promoting 'game hacks' and 'free generators' which are common lures for malicious downloads. The ML classifier strongly indicated maliciousness, and the presence of redirector links suggests an attempt to lead the user to a malicious site. No scripts were extracted, but the document's structure and embedded URLs point to a phishing or social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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.online/app/406889139/how-to-get-free-food-on-coin-master-game-hack In PDF document text
    • http://library.umuslim.ac.id/repository/how-to-get-a-refund-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/free-coin-app_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/cm-spins_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/cm-free-spins_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/coin-master-free-cards-link-2021_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/how-to-exploit-roblox_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/free-spins-coin-master-apple_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/roblox-hack-codes_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/coin-master-free-spins-link-blogspot_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/free-spins-coin-master-links_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/roblox-top_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/coin-master-links-for-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/2021-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/minecraft-anarchy-server-no-hacks_GM479516143.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/coin-master-fan-page-free-spins_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/roblox-arsenal-hacks-download_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/free-robux-codes_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/robloxfun-com-generator_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/free-coin-master-spins-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_off0000511a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x511A 26344 bytes
SHA-256: 951c9ea7d07459ddc0e0b2e1e9f8938217b18e52c53fb4776eadc92854be2cc7
font_01_sfnt_off00008ce9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8CE9 18048 bytes
SHA-256: 80f71b64fdae1376f671ee29083f27768c0f143acc59e91e746c89af89705883

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