Malicious PDF — malware analysis report

Static analysis result for SHA-256 72bda6e36faf2916…

MALICIOUS

PDF

44.9 KB Created: 2021-05-13 16:39:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: d7b38d2ebc52073072bd32fc9631b975 SHA-1: 732a135a4a6d556ed80b2d8ef65854fed1467813 SHA-256: 72bda6e36faf29164b7c5ff5f8f519314c73a9f0648500be25f73f14b0077f38
200 Risk Score

Malware Insights

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

The PDF contains embedded links that lead to a malicious redirector disguised as a "game hack" generator, impersonating Facebook. The ML classifier strongly indicated maliciousness, and the presence of multiple links to known malicious infrastructure confirms a phishing and redirection attempt. No scripts were extracted, but the document's structure and embedded URLs suggest it's designed to trick users into visiting malicious sites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9632

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.
  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://netcdn.xyz/app/406889139/coin-master-links-for-today-game-hack.
  • 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/406889139/coin-master-links-for-today-game-hack In PDF document text
    • https://pasangindihomemagelang.com/ckfinder/userfiles/files/free-daily-spin-coin-master-game_GM406889139.pdfIn PDF document text
    • https://pasangindihomemagelang.com/ckfinder/userfiles/files/how-to-get-free-robux-with-no-verification_GM431946152.pdfIn PDF document text
    • https://pasangindihomemagelang.com/ckfinder/userfiles/files/arsenal-hacks-roblox_GM431946152.pdfIn PDF document text
    • https://pasangindihomemagelang.com/ckfinder/userfiles/files/coin-master-spins-hack-2021_GM406889139.pdfIn PDF document text
    • https://pasangindihomemagelang.com/ckfinder/userfiles/files/coin-master-free-link-blogspot_GM406889139.pdfIn PDF document text
    • https://pasangindihomemagelang.com/ckfinder/userfiles/files/hack-my-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://pasangindihomemagelang.com/ckfinder/userfiles/files/coin-master-hack-unlimited-spins-and-coins-cheats_GM406889139.pdfIn PDF document text
    • https://pasangindihomemagelang.com/ckfinder/userfiles/files/free-robux-2021_GM431946152.pdfIn PDF document text
    • https://pasangindihomemagelang.com/ckfinder/userfiles/files/roblox-old-avatar_GM431946152.pdfIn PDF document text
    • https://pasangindihomemagelang.com/ckfinder/userfiles/files/coin-master-daily-free-spins-blog_GM406889139.pdfIn PDF document text
    • https://pasangindihomemagelang.com/ckfinder/userfiles/files/blogspot-coin-master-spins_GM406889139.pdfIn PDF document text
    • https://pasangindihomemagelang.com/ckfinder/userfiles/files/roblox-hacked-version-download_GM431946152.pdfIn PDF document text
    • https://pasangindihomemagelang.com/ckfinder/userfiles/files/free-coin-master-spins-link_GM406889139.pdfIn PDF document text
    • https://pasangindihomemagelang.com/ckfinder/userfiles/files/coin-master-free-link_GM406889139.pdfIn PDF document text
    • https://pasangindihomemagelang.com/ckfinder/userfiles/files/coin-master-hacker-club_GM406889139.pdfIn PDF document text
    • https://pasangindihomemagelang.com/ckfinder/userfiles/files/best-minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • https://pasangindihomemagelang.com/ckfinder/userfiles/files/how-do-you-hack-roblox_GM431946152.pdfIn PDF document text
    • https://pasangindihomemagelang.com/ckfinder/userfiles/files/coin-master-free-gift-cards_GM406889139.pdfIn PDF document text
    • https://pasangindihomemagelang.com/ckfinder/userfiles/files/how-do-you-get-roblox-for-free_GM431946152.pdfIn PDF document text
    • https://pasangindihomemagelang.com/ckfinder/userfiles/files/roblox-hack-download_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004a92.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A92 24500 bytes
SHA-256: 3d1295bc23ec89e577d854a4bb795a95f4f835ed00a517cfa0c24767f8bb25f8
font_01_sfnt_off000081e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81E0 3204 bytes
SHA-256: 8c2546387700f45186c395d475006178ee984eabbc175bcf1ee6eb58ba8b57aa
font_02_sfnt_off00008ce4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8CE4 18232 bytes
SHA-256: 79bece74db2dd822c76612a1664280e186053a2a893c50b912a800105546df15