Malicious PDF — malware analysis report

Static analysis result for SHA-256 1678e668b21ddbef…

MALICIOUS

PDF

43.9 KB Created: 2021-05-17 04:36:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 82bca2d9228aaa2edde6680c8b759638 SHA-1: af794f9ebf02d6101876451d8e2a42412979953a SHA-256: 1678e668b21ddbef613bb49b48f9aabaec477758620fdebd6f55da1405f5d62a
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded URLs that lead to a known malicious redirector infrastructure, disguised as generators for popular games like Minecraft and Roblox. The document body and heuristics indicate a lure to trick users into clicking these links, likely to download further malicious content or redirect to phishing sites. No scripts were extracted, but the presence of malicious links and the lure pattern strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9648

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/free-minecraft-server-maker-game-hack In PDF document text
    • http://ivpr.net/images/real-free-robux-codes_GM431946152.pdfIn PDF document text
    • http://ivpr.net/images/how-do-we-get-free-robux_GM431946152.pdfIn PDF document text
    • http://ivpr.net/images/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://ivpr.net/images/links-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://ivpr.net/images/easy-ways-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://ivpr.net/images/coin-master-hack-cheat-generator-d_GM406889139.pdfIn PDF document text
    • http://ivpr.net/images/coin-master-free-cards-link-2021_GM406889139.pdfIn PDF document text
    • http://ivpr.net/images/coin-master-daily-free-spins-link-today-facebook_GM406889139.pdfIn PDF document text
    • http://ivpr.net/images/coin-master-free-cards-link_GM406889139.pdfIn PDF document text
    • http://ivpr.net/images/roblox-ban_GM431946152.pdfIn PDF document text
    • http://ivpr.net/images/roblox-free-robux-hack_GM431946152.pdfIn PDF document text
    • http://ivpr.net/images/free-spins-coin-master-haktuts_GM406889139.pdfIn PDF document text
    • http://ivpr.net/images/roblox-hack-2021_GM431946152.pdfIn PDF document text
    • http://ivpr.net/images/coin-master-hack-xyz-download-free_GM406889139.pdfIn PDF document text
    • http://ivpr.net/images/roblox-com-www_GM431946152.pdfIn PDF document text
    • http://ivpr.net/images/robux-free-co_GM431946152.pdfIn PDF document text
    • http://ivpr.net/images/coin-master-hack-without-human-verification-2021_GM406889139.pdfIn PDF document text
    • http://ivpr.net/images/coin-master-spin-hack-without-verification_GM406889139.pdfIn PDF document text
    • http://ivpr.net/images/how-to-get-free-robux-easy_GM431946152.pdfIn PDF document text
    • http://ivpr.net/images/coin-master-free-coins-and-spins-link_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0000471d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x471D 25300 bytes
SHA-256: 909606b3225d887fe8a6eefa6612a4277ec8620824a6d51f33cbcd4b46f79235
font_01_sfnt_off0000807b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x807B 2840 bytes
SHA-256: 3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676
font_02_sfnt_off00008a2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A2D 17852 bytes
SHA-256: a2113846211f941d41962086a33418b46c13efddcea93467eebdb757cad7d920

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