Malicious PDF — malware analysis report

Static analysis result for SHA-256 42b828a5c1eebc1a…

MALICIOUS

PDF

41.6 KB Created: 2021-05-14 23:30:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 494229187db5b93d84c8bfa74e85ecc0 SHA-1: 80a33b262f588127b282af0f067a5a46363e4b19 SHA-256: 42b828a5c1eebc1a98bbc7ba744fe6d8d49e47fb1249fee37e7a88b503280aa2
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a common lure of 'game hacks' and 'free generators' to trick users into clicking malicious links. The embedded URLs, such as 'https://netcdn.xyz/app/479516143/minecraft-hacks-pc-game-hack', are flagged as malicious redirectors, likely leading to further malicious content or downloads. The ML classifier strongly supports the malicious nature of this PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/479516143/minecraft-hacks-pc-game-hack In PDF document text
    • https://itv-grabungen.de/images/haktuts-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://itv-grabungen.de/images/coin-master-game-free_GM406889139.pdfIn PDF document text
    • https://itv-grabungen.de/images/rbx-robux_GM431946152.pdfIn PDF document text
    • https://itv-grabungen.de/images/who-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://itv-grabungen.de/images/roblox-robux-hack_GM431946152.pdfIn PDF document text
    • https://itv-grabungen.de/images/robux-hack-me_GM431946152.pdfIn PDF document text
    • https://itv-grabungen.de/images/coin-master-hack-game_GM406889139.pdfIn PDF document text
    • https://itv-grabungen.de/images/how-to-get-free-robux-on-iphone_GM431946152.pdfIn PDF document text
    • https://itv-grabungen.de/images/hack-version-of-coin-master_GM406889139.pdfIn PDF document text
    • https://itv-grabungen.de/images/robux-hack-tools_GM431946152.pdfIn PDF document text
    • https://itv-grabungen.de/images/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • https://itv-grabungen.de/images/how-to-download-minecraft-for-free-on-windows-10_GM479516143.pdfIn PDF document text
    • https://itv-grabungen.de/images/coin-master-free-spins-and-coins-without-human-verification_GM406889139.pdfIn PDF document text
    • https://itv-grabungen.de/images/free-spins-promo-code-for-coin-master_GM406889139.pdfIn PDF document text
    • https://itv-grabungen.de/images/how-to-hack-and-get-free-robux_GM431946152.pdfIn PDF document text
    • https://itv-grabungen.de/images/coin-master-free-link_GM406889139.pdfIn PDF document text
    • https://itv-grabungen.de/images/coin-master-free-coins-and-spins-link-2021_GM406889139.pdfIn PDF document text
    • https://itv-grabungen.de/images/coin-master-hack-spins-apk_GM406889139.pdfIn PDF document text
    • https://itv-grabungen.de/images/coin-master-free-spins-link-today-facebook_GM406889139.pdfIn PDF document text
    • https://itv-grabungen.de/images/blogspot-coin-master-free-spins_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
stream_003_off00004929.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4929 24956 bytes
SHA-256: bc633cd2f2122508245b36a06f2711fa2df95a649de9f50ee1bf05624a591242
font_01_sfnt_off000081c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81C0 17892 bytes
SHA-256: 4b573e8fc82ea506cc897612561133da94e30df5f60715d4b9731bc7aae59dad

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