Malicious PDF — malware analysis report

Static analysis result for SHA-256 d76c70d9a69ee544…

MALICIOUS

PDF

44.8 KB Created: 2021-05-10 20:32:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: cd3456bf31b3adccf7013e8df21fcc04 SHA-1: 9cfc522db95b35b246a83356b2b9479c102124d2 SHA-256: d76c70d9a69ee544e00c43b40868740cd8c330d1bf36b5ef22c00ee4ae216046
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that redirect to known malicious infrastructure, specifically promoting 'free generator / game hack' lures. The document body and extracted URLs reinforce this lure, suggesting the primary goal is to trick users into visiting the malicious redirector. While no scripts were explicitly extracted, the PDF structure and malicious links indicate a likely attempt to download further malicious content or redirect to a phishing site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9632

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-mods-for-minecraft-pe-game-hack In PDF document text
    • http://smkn1salatiga.sch.id/library/repository/how-to-get-a-free-minecraft-server_GM479516143.pdfIn PDF document text
    • http://smkn1salatiga.sch.id/library/repository/roblox-help-free-robux_GM431946152.pdfIn PDF document text
    • http://smkn1salatiga.sch.id/library/repository/hackear-coin-master-sin-root_GM406889139.pdfIn PDF document text
    • http://smkn1salatiga.sch.id/library/repository/coin-master-tiradas-gratis_GM406889139.pdfIn PDF document text
    • http://smkn1salatiga.sch.id/library/repository/ro-ghoul-script_GM431946152.pdfIn PDF document text
    • http://smkn1salatiga.sch.id/library/repository/orewards-com-free-robux_GM431946152.pdfIn PDF document text
    • http://smkn1salatiga.sch.id/library/repository/coin-master-hack-unlimited-spins_GM406889139.pdfIn PDF document text
    • http://smkn1salatiga.sch.id/library/repository/how-to-get-free-robux-instantly_GM431946152.pdfIn PDF document text
    • http://smkn1salatiga.sch.id/library/repository/coin-master-free-spins-today-daily-links_GM406889139.pdfIn PDF document text
    • http://smkn1salatiga.sch.id/library/repository/how-to-get-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • http://smkn1salatiga.sch.id/library/repository/codes-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://smkn1salatiga.sch.id/library/repository/instant-robux_GM431946152.pdfIn PDF document text
    • http://smkn1salatiga.sch.id/library/repository/get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://smkn1salatiga.sch.id/library/repository/can-i-have-robux_GM431946152.pdfIn PDF document text
    • http://smkn1salatiga.sch.id/library/repository/free-robux-script_GM431946152.pdfIn PDF document text
    • http://smkn1salatiga.sch.id/library/repository/robux-com-roblox_GM431946152.pdfIn PDF document text
    • http://smkn1salatiga.sch.id/library/repository/free-minecraft-addons_GM479516143.pdfIn PDF document text
    • http://smkn1salatiga.sch.id/library/repository/free-pet-food-coin-master_GM406889139.pdfIn PDF document text
    • http://smkn1salatiga.sch.id/library/repository/coin-master-free-spin-link-app_GM406889139.pdfIn PDF document text
    • http://smkn1salatiga.sch.id/library/repository/free-modded-minecraft-server_GM479516143.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_off00004b34.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B34 24524 bytes
SHA-256: be75248f007ea80d739aa30162ed4899647727758fd3e0c91409307dbb45c370
font_01_sfnt_off000082b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82B6 3092 bytes
SHA-256: 3811f2fb1880daf4953efcc9c7427d9b438bced237490b00be4a6ec3ecea79e0
font_02_sfnt_off00008d60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D60 18040 bytes
SHA-256: 55677d50e7f19372d6dfb723d72c398dee248f925afb4425ab44c3bb4ecd28f4

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