Malicious PDF — malware analysis report

Static analysis result for SHA-256 dca809d2bb33443b…

MALICIOUS

PDF

44.2 KB Created: 2021-05-11 04:34:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 62dd326de13d3e8a2602349451b61567 SHA-1: 256b3e1fc3f0bb8cd00c8c078d2958b3a0080926 SHA-256: dca809d2bb33443bb25f63769c30a3f2c1b74407a4120819e5d979b1190eb659
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a common lure of free game-related items to trick users into clicking malicious links. It contains numerous links to SEO link farms and a known malicious redirector, indicating a phishing or scam campaign. The ML classifier also strongly flagged this PDF as malicious.

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 https://netcdn.xyz/app/479516143/free-minecraft-skin-maker-game-hack In PDF document text
    • https://newenglandafs.com/images/free-coin-master-spins-hack_GM406889139.pdfIn PDF document text
    • https://newenglandafs.com/images/free-promo-codes-roblox_GM431946152.pdfIn PDF document text
    • https://newenglandafs.com/images/minecraft-iphone-free_GM479516143.pdfIn PDF document text
    • https://newenglandafs.com/images/coin-master-gold-cards-free_GM406889139.pdfIn PDF document text
    • https://newenglandafs.com/images/free-coins-coin-master-no-human-verification_GM406889139.pdfIn PDF document text
    • https://newenglandafs.com/images/free-robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • https://newenglandafs.com/images/coin-master-free-spins-link-cheat_GM406889139.pdfIn PDF document text
    • https://newenglandafs.com/images/roblox-download_GM431946152.pdfIn PDF document text
    • https://newenglandafs.com/images/coin-master-fun-hack_GM406889139.pdfIn PDF document text
    • https://newenglandafs.com/images/free-robux-generator-2021-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • https://newenglandafs.com/images/roblox-arsenal-hack-script-pastebin_GM431946152.pdfIn PDF document text
    • https://newenglandafs.com/images/coin-master-game-free-download-for-pc_GM406889139.pdfIn PDF document text
    • https://newenglandafs.com/images/june-29-coin-master-hack-no-human-verification_GM406889139.pdfIn PDF document text
    • https://newenglandafs.com/images/how-to-get-free-coins-and-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://newenglandafs.com/images/free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • https://newenglandafs.com/images/roblox-getting-hacked_GM431946152.pdfIn PDF document text
    • https://newenglandafs.com/images/if-i-uninstall-minecraft-can-i-reinstall-it-for-free_GM479516143.pdfIn PDF document text
    • https://newenglandafs.com/images/minecraft-free-download-android-apk-014-0_GM479516143.pdfIn PDF document text
    • https://newenglandafs.com/images/roblox-devil_GM431946152.pdfIn PDF document text
    • https://newenglandafs.com/images/minecraft-the-complete-handbook-collection_GM479516143.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
stream_003_off00004c18.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4C18 29440 bytes
SHA-256: dcab2c86781d46c8388f3501115945477b05dad661df9f93c211693b09a6529f
font_01_sfnt_off00008c5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C5F 17740 bytes
SHA-256: 7e8236a58a56ce0148da12d4a95e9c7df934e3b28e502a8d8a58237e3f9d26f8

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