Malicious PDF — malware analysis report

Static analysis result for SHA-256 1fb0071d4f661a66…

MALICIOUS

PDF

38.8 KB Created: 2021-05-23 20:19:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: d4174a23a7087853aabdfa3ce3b6606d SHA-1: 85b0085a943379cc08d00e6ef0c8451ab4518106 SHA-256: 1fb0071d4f661a665c4630433039d9c21af46391bcafb5ae9adc555901b01a69
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to malicious redirectors, masquerading as 'free generators' for popular online services. The document body explicitly mentions 'Free Tiktok Fans And Likes' and includes a call to action to access a 'TIKTOK GENERATOR'. The embedded URLs and heuristic firings strongly indicate a phishing or scam attempt designed to lead users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8060

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/835599320/free-tiktok-fans-and-likes-game-hack In PDF document text
    • http://artindex.pro/images/free-robux-no-verification-no-survey_GM431946152.pdfIn PDF document text
    • http://artindex.pro/images/where-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://artindex.pro/images/lazy-blocks-com-free-robux_GM431946152.pdfIn PDF document text
    • http://artindex.pro/images/how-to-get-uc-and-bp-in-pubg_GM1330123889.pdfIn PDF document text
    • http://artindex.pro/images/how-to-hack-roblox-for-robux_GM431946152.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_002_off00002e7e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2E7E 27632 bytes
SHA-256: ed0b2758c5f603856ddd0c3b77cab15f44514b3a9c4eb38aa2a2fb93d39a1232
font_01_sfnt_off00006c0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C0B 3284 bytes
SHA-256: 08634c76f2d2d32d10bcb76440c2f66c9b2439f3e1410f8511f64d9a1303c699
font_02_sfnt_off00007759.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7759 17856 bytes
SHA-256: 73670565195d1614abdebf4593265cc7a8d42409e9f7addc13b51e248eeb6564

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