Malicious PDF — malware analysis report

Static analysis result for SHA-256 34c2534c04cb5462…

MALICIOUS

PDF

41.7 KB Created: 2021-05-16 12:10:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 482235fc0a2d3eded7f04cea610e08aa SHA-1: 2fdd155b7c70724a5f16bbae641b3407ee29e6f1 SHA-256: 34c2534c04cb54622af67bab0ba7c263ed8985a05ab7534b3f69bffd083e2ceb
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document acts as a lure, employing a 'game hack' theme to trick users into clicking links. The primary link directs to a known malicious redirector infrastructure, which in turn hosts a large number of other PDF documents, likely part of a link farm or scam network. The document body and embedded links strongly suggest a social engineering attack aimed at driving traffic to scam sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/406889139/real-hack-for-coin-master-game-hack In PDF document text
    • https://itv-grabungen.de/images/is-minecraft-free-on-nintendo-switch_GM479516143.pdfIn PDF document text
    • https://itv-grabungen.de/images/free-robux-scams_GM431946152.pdfIn PDF document text
    • https://itv-grabungen.de/images/how-can-i-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://itv-grabungen.de/images/free-game-packs-for-coin-master_GM406889139.pdfIn PDF document text
    • https://itv-grabungen.de/images/coin-master-free-rare-cards_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/roblox-group-free-robux_GM431946152.pdfIn PDF document text
    • https://itv-grabungen.de/images/free-robux-com_GM431946152.pdfIn PDF document text
    • https://itv-grabungen.de/images/how-to-get-free-pet-food-in-coin-master_GM406889139.pdfIn PDF document text
    • https://itv-grabungen.de/images/como-conseguir-monedas-infinitas-y-tiradas-de-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://itv-grabungen.de/images/how-to-get-free-roebucks-in-roblox_GM431946152.pdfIn PDF document text
    • https://itv-grabungen.de/images/app-store-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://itv-grabungen.de/images/how-to-get-free-robux-on-chromebook_GM431946152.pdfIn PDF document text
    • https://itv-grabungen.de/images/how-to-get-free-robux-games_GM431946152.pdfIn PDF document text
    • https://itv-grabungen.de/images/coin-master-mod-version-free-download-ios_GM406889139.pdfIn PDF document text
    • https://itv-grabungen.de/images/google-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://itv-grabungen.de/images/minecraft-hacks-18-9_GM479516143.pdfIn PDF document text
    • https://itv-grabungen.de/images/how-to-get-free-roblox_GM431946152.pdfIn PDF document text
    • https://itv-grabungen.de/images/100-hack-coin-master_GM406889139.pdfIn PDF document text
    • https://itv-grabungen.de/images/free-shields-coin-master_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_off000049a7.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x49A7 24424 bytes
SHA-256: ab4150a68d4139cf0483078da65cea94a8fdd0e560d0107612f5ed9cc5025efc
font_01_sfnt_off000081c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81C6 17956 bytes
SHA-256: c3bff0caf4b3e4fab2d80157ad4f14f97eaac11d6adb17aae1b51a270053db42

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