Malicious PDF — malware analysis report

Static analysis result for SHA-256 e514d670eeca5387…

MALICIOUS

PDF

46.1 KB Created: 2021-06-04 02:44:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: a37942ba6b8972295603f0a869e9b626 SHA-1: 0f63c88c54e0f0087996bb2956ef1e175d827005 SHA-256: e514d670eeca5387c216585d324de6ce7ff1d31bc767531ef4960c77f066d932
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links that redirect to a malicious domain, masquerading as a 'free generator' or 'game hack'. The ML classifier strongly indicated maliciousness, and the presence of redirector links confirms a malicious workflow. No scripts were extracted, but the document's primary function appears to be directing users to a potentially harmful website.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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.online/app/431946152/robux-free-com-game-hack In PDF document text
    • https://library.sman1berau.sch.id/repository/how-to-hack-any-roblox-account_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/roblox-free-body_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/free-robux-with-no-human-verification_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/real-free-robux-generator_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/create-minecraft-server-free_GM479516143.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/where-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/coin-spin_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/how-to-get-free-roblox-money_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/master-8-ball-pool-free-coins_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/how-do-you-get-free-roblox_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/pubg-uc-100k_GM1330123889.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/bux-life-free-robux_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/hack-to-protect-village-on-coin-master_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/how-to-hack-coin-master-spin-in-hindi_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/easy-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/cute-free-hair-on-roblox_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/how-to-get-hacks-on-roblox_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/free-robux-hacker-us_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/minecraft-hacks-18-9_GM479516143.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/free-robux-real_GM431946152.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_004_off000051d4.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x51D4 28004 bytes
SHA-256: fd9f9778b29dca1c66d0575a61cf1daef72f2d92320f21b78e2ea52ffd985b40
font_01_sfnt_off000091d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x91D6 18276 bytes
SHA-256: 0fd65c317a1abc649e3faff400e4768e1aa7d1dd6ac5589c15474ffa47aab2c1

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