Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a4631ad4f961f2c…

MALICIOUS

PDF

45.0 KB Created: 2021-05-12 05:32:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 5598aee83048daaf7d6e8f7d09cbf31c SHA-1: 86ee6c68592ecec6a6f8950bc8b7340c30110b62 SHA-256: 2a4631ad4f961f2cbc99b3d2dfea281cf4c680485b3e09ca5ee623569a91e65a
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to a known malicious redirector infrastructure, disguised as a 'free generator' or 'game hack' lure. The document body and embedded URLs strongly suggest a phishing or scam attempt, likely to lead users to further malicious content or downloads. No scripts were extracted, but the presence of malicious links and the lure indicate a high likelihood of a phishing attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9632

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.xyz/app/406889139/legit-free-spins-coin-master-game-hack In PDF document text
    • https://pengacara-nbp.com/ckfinder/userfiles/files/my-roblox-avatar_GM431946152.pdfIn PDF document text
    • https://pengacara-nbp.com/ckfinder/userfiles/files/easy-robux-hack_GM431946152.pdfIn PDF document text
    • https://pengacara-nbp.com/ckfinder/userfiles/files/free-spins-on-coin-master-link_GM406889139.pdfIn PDF document text
    • https://pengacara-nbp.com/ckfinder/userfiles/files/haktuts-coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • https://pengacara-nbp.com/ckfinder/userfiles/files/free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • https://pengacara-nbp.com/ckfinder/userfiles/files/arsenal-hacks-roblox_GM431946152.pdfIn PDF document text
    • https://pengacara-nbp.com/ckfinder/userfiles/files/how-to-get-free-robux-easy_GM431946152.pdfIn PDF document text
    • https://pengacara-nbp.com/ckfinder/userfiles/files/how-to-get-free-robux-codes_GM431946152.pdfIn PDF document text
    • https://pengacara-nbp.com/ckfinder/userfiles/files/how-to-make-a-roblox-group-for-free_GM431946152.pdfIn PDF document text
    • https://pengacara-nbp.com/ckfinder/userfiles/files/roblox-games-with-free-boombox_GM431946152.pdfIn PDF document text
    • https://pengacara-nbp.com/ckfinder/userfiles/files/coin-master-free-link-today_GM406889139.pdfIn PDF document text
    • https://pengacara-nbp.com/ckfinder/userfiles/files/coin-master-free-spins-links-2021_GM406889139.pdfIn PDF document text
    • https://pengacara-nbp.com/ckfinder/userfiles/files/fbchampion-com_GM406889139.pdfIn PDF document text
    • https://pengacara-nbp.com/ckfinder/userfiles/files/how-to-get-minecraft-java-free_GM479516143.pdfIn PDF document text
    • https://pengacara-nbp.com/ckfinder/userfiles/files/minecraft-com-free_GM479516143.pdfIn PDF document text
    • https://pengacara-nbp.com/ckfinder/userfiles/files/roblox-promo-codes-free-robux_GM431946152.pdfIn PDF document text
    • https://pengacara-nbp.com/ckfinder/userfiles/files/25-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://pengacara-nbp.com/ckfinder/userfiles/files/earn-free-robux_GM431946152.pdfIn PDF document text
    • https://pengacara-nbp.com/ckfinder/userfiles/files/coin-master-hack-coins_GM406889139.pdfIn PDF document text
    • https://pengacara-nbp.com/ckfinder/userfiles/files/coin-master-hack-2021-no-human-verification_GM406889139.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_off00004982.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4982 25164 bytes
SHA-256: 2b7af3dc89b45f19eb1bc1f850c9b05381a26d786e19ab0da172cc3d01b58624
font_01_sfnt_off000083d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83D0 2840 bytes
SHA-256: 3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676
font_02_sfnt_off00008d81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D81 18176 bytes
SHA-256: 0e4f5fc6ff2fec7c34f7a60300b1fa14fa22cd043badad59a9fad54dc28be7cf

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