Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d4ffb1e9c01553e…

MALICIOUS

PDF

44.7 KB Created: 2021-05-13 09:45:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 425b17e391971d70c0ea900c7347fa6d SHA-1: 8d425c3321e9e230fe159a23c247384a09489cd5 SHA-256: 6d4ffb1e9c01553e62ebe0b78777b8f408e72192ecbb0e224a0892cbffe38a43
220 Risk Score

Malware Insights

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

This PDF document employs a lure of free game hacks and accounts to entice users to click on embedded links. The links lead to known malicious redirectors and a large number of SEO-optimized PDF link farms, suggesting a campaign to drive traffic to potentially malicious sites or distribute further malware. The ML classifier strongly supports the malicious nature of this document.

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/431946152/free-roblox-script-executor-game-hack In PDF document text
    • https://itv-grabungen.de/images/free-minecraft-java-edition-account_GM479516143.pdfIn PDF document text
    • https://itv-grabungen.de/images/coin-master-spin-hack-without-verification_GM406889139.pdfIn PDF document text
    • https://itv-grabungen.de/images/free-shields-coin-master_GM406889139.pdfIn PDF document text
    • https://itv-grabungen.de/images/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • https://itv-grabungen.de/images/coin-master-free-spins-2021-generator_GM406889139.pdfIn PDF document text
    • https://itv-grabungen.de/images/coin-master-free-spins-deutsch-download-ios-link_GM406889139.pdfIn PDF document text
    • https://itv-grabungen.de/images/coin-master-free-coins-link-2021-deutsch_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/blox-land-free-robux_GM431946152.pdfIn PDF document text
    • https://itv-grabungen.de/images/how-to-become-a-hacker-in-roblox_GM431946152.pdfIn PDF document text
    • https://itv-grabungen.de/images/how-to-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://itv-grabungen.de/images/free-robux-no-verification-or-survey_GM431946152.pdfIn PDF document text
    • https://itv-grabungen.de/images/blogspot-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://itv-grabungen.de/images/free-robux-roblox-promo-codes_GM431946152.pdfIn PDF document text
    • https://itv-grabungen.de/images/free-roblox-adopt-me-accounts_GM431946152.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-roblox-accounts-2021_GM431946152.pdfIn PDF document text
    • https://itv-grabungen.de/images/coin-master-spin-hack-2021_GM406889139.pdfIn PDF document text
    • https://itv-grabungen.de/images/coin-master-hacks-no-surveys_GM406889139.pdfIn PDF document text
    • https://itv-grabungen.de/images/freespins-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_off00004a41.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A41 28072 bytes
SHA-256: 7b66c192bce27af31c84f26a3d347ac94af6455e6e60dd3fecc848196ca3c46d
font_01_sfnt_off00008c2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C2F 18488 bytes
SHA-256: 2f4c38176d8cbab07fd1bda2893835b696516e96c8cac9602066249ab90f5718

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