Malicious PDF — malware analysis report

Static analysis result for SHA-256 887ad378f0896f8a…

MALICIOUS

PDF

42.1 KB Created: 2021-05-10 19:05:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: a7f9bfdd6e5a40d045762f78f63b9fae SHA-1: 4b064f2bf6253ba741827b42000ca5c486240dab SHA-256: 887ad378f0896f8a6d030948367a567326668667113aad665df4dd965fe96099
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded links, including one identified as a malicious redirector. The document body and heuristics suggest a lure for free game currency or hacks, directing users to potentially malicious sites. The presence of multiple links and the nature of the lure indicate a phishing or scam attempt.

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/406889139/free-spins-coin-master-no-survey-game-hack In PDF document text
    • https://ethraa.ae/userfiles/files/robux-free-co_GM431946152.pdfIn PDF document text
    • https://ethraa.ae/userfiles/files/free-op-minecraft-servers_GM479516143.pdfIn PDF document text
    • https://ethraa.ae/userfiles/files/free-roblox-accounts-with-robux-2021_GM431946152.pdfIn PDF document text
    • https://ethraa.ae/userfiles/files/free-robux-generator-no-survey_GM431946152.pdfIn PDF document text
    • https://ethraa.ae/userfiles/files/coin-master-daily-free-spins-link-facebook_GM406889139.pdfIn PDF document text
    • https://ethraa.ae/userfiles/files/hack-xp-net-coin-master_GM406889139.pdfIn PDF document text
    • https://ethraa.ae/userfiles/files/coin-master-free-coins-and-spins-daily-summary_GM406889139.pdfIn PDF document text
    • https://ethraa.ae/userfiles/files/how-do-you-hack-roblox_GM431946152.pdfIn PDF document text
    • https://ethraa.ae/userfiles/files/hack-coin-master-no-survey_GM406889139.pdfIn PDF document text
    • https://ethraa.ae/userfiles/files/free-roblox-pin-codes_GM431946152.pdfIn PDF document text
    • https://ethraa.ae/userfiles/files/free-robux-without-downloading-apps_GM431946152.pdfIn PDF document text
    • https://ethraa.ae/userfiles/files/free-robux-live_GM431946152.pdfIn PDF document text
    • https://ethraa.ae/userfiles/files/free-robux-today_GM431946152.pdfIn PDF document text
    • https://ethraa.ae/userfiles/files/mc-hacks_GM479516143.pdfIn PDF document text
    • https://ethraa.ae/userfiles/files/free-spins-generated-from-coin-master_GM406889139.pdfIn PDF document text
    • https://ethraa.ae/userfiles/files/roblox-a_GM431946152.pdfIn PDF document text
    • https://ethraa.ae/userfiles/files/free-robux-2021-no-verification_GM431946152.pdfIn PDF document text
    • https://ethraa.ae/userfiles/files/coin-master-cards-hack-2021_GM406889139.pdfIn PDF document text
    • https://ethraa.ae/userfiles/files/coin-master-hack-apk-april-12-2021_GM406889139.pdfIn PDF document text
    • https://ethraa.ae/userfiles/files/free-coin-master-spins-2021_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_off00004935.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4935 24940 bytes
SHA-256: b57acc6bddaa2ab32e1af51dffae50b65a9c8e902533f7492420416c2b2aa85b
font_01_sfnt_off0000820e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x820E 18320 bytes
SHA-256: 6a03f57263559e9587b81532abc9fd32f424c2609b001658afc37b888698790b

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