Malicious PDF — malware analysis report

Static analysis result for SHA-256 befb6966da788901…

MALICIOUS

PDF

34.0 KB Created: 2021-07-20 14:42:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: dce0c1305d1c4f1c8f1af0c4e7682fe7 SHA-1: a212d0b9ed4112a0d7f151cb7e3b964f09f8711d SHA-256: befb6966da78890142446a04e90bb7fcaad9e2d5df6ca09468ab915460d6597a
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains links that redirect to malicious infrastructure, masquerading as a 'free generator' or 'game hack'. The document body explicitly mentions 'Free Tiktok Fans' and 'CLICK HERE TO ACCESS TIKTOK GENERATOR', reinforcing the lure. While no scripts were directly extracted, the PDF structure and embedded links strongly suggest a social engineering attack aimed at driving traffic to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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 http://netcdn.tw/app/835599320/free-tiktok-fans-no-human-verification-or-downloading-apps-game-hack In PDF document text
    • https://library.sman1berau.sch.id/repository/roblox-hack-me_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/earn-free-robux_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/claim-free-robux_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/give-me-free-robux_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/free-robux-promo-codes_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/minecraft-free-download-iphone_GM479516143.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/free-robux-generator-no-survey_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/how-to-hack-roblox-accounts-2021-easy_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/free-spins-coins-coin-master_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/coin-master-free-spins-link-today-facebook_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_002_off00002bdd.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2BDD 23216 bytes
SHA-256: 94f37b6d13bf9a4f2a1ee924fc7297e1f65d3e18d06a99a413d04f134405a780
font_01_sfnt_off00006008.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6008 19260 bytes
SHA-256: c23abd5df90a5b7093cc3e198b5bcaea5ee7ff11a274e14c679da15d1a345c21

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