Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ba5a985a2241c62…

MALICIOUS

PDF

44.0 KB Created: 2021-05-13 01:15:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 8902cdbc181498a44a728ba4e9e1cb4c SHA-1: 4a1fb382fa575ca0af4812a37cd8c0f3865ed5d5 SHA-256: 3ba5a985a2241c62dca1834b677829b72579ff2db16ef86f22306bddb05f289b
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded links that point to known malicious redirectors, specifically promoting "game hacks" and "free spins". The heuristic firings confirm these links are associated with malicious redirector infrastructure and lure tactics. While no scripts were explicitly extracted, the nature of the embedded links suggests a phishing or malware distribution attempt, likely initiated via a spearphishing attachment.

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/406889139/free-coin-master-spins-blog-game-hack In PDF document text
    • https://www.repository.ptiq.ac.id/repository/xray-hack_GM479516143.pdfIn PDF document text
    • https://www.repository.ptiq.ac.id/repository/free-free-robux_GM431946152.pdfIn PDF document text
    • https://www.repository.ptiq.ac.id/repository/how-to-get-free-spins-on-coin-master-2021-links_GM406889139.pdfIn PDF document text
    • https://www.repository.ptiq.ac.id/repository/minecraft-hack-mod_GM479516143.pdfIn PDF document text
    • https://www.repository.ptiq.ac.id/repository/free-robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://www.repository.ptiq.ac.id/repository/coin-master-links-2021_GM406889139.pdfIn PDF document text
    • https://www.repository.ptiq.ac.id/repository/free-robux-hack_GM431946152.pdfIn PDF document text
    • https://www.repository.ptiq.ac.id/repository/village-4-coin-master_GM406889139.pdfIn PDF document text
    • https://www.repository.ptiq.ac.id/repository/free-roblox-adopt-me-pets_GM431946152.pdfIn PDF document text
    • https://www.repository.ptiq.ac.id/repository/coin-master-hack-2021-free_GM406889139.pdfIn PDF document text
    • https://www.repository.ptiq.ac.id/repository/codes-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.repository.ptiq.ac.id/repository/coin-master-hack-link-2021_GM406889139.pdfIn PDF document text
    • https://www.repository.ptiq.ac.id/repository/was-minecraft-ever-free_GM479516143.pdfIn PDF document text
    • https://www.repository.ptiq.ac.id/repository/free-robux-generator_GM431946152.pdfIn PDF document text
    • https://www.repository.ptiq.ac.id/repository/free-roblox-accounts-dantdm_GM431946152.pdfIn PDF document text
    • https://www.repository.ptiq.ac.id/repository/free-robux-codes-no-human-verification_GM431946152.pdfIn PDF document text
    • https://www.repository.ptiq.ac.id/repository/free-robux-promo-codes_GM431946152.pdfIn PDF document text
    • https://www.repository.ptiq.ac.id/repository/how-do-i-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://www.repository.ptiq.ac.id/repository/roblox-hack-apk_GM431946152.pdfIn PDF document text
    • https://www.repository.ptiq.ac.id/repository/roblox-free-robux-website_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_003_off00004833.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4833 23832 bytes
SHA-256: 6ab6db7afb0307ae63faaaa8a897a2e68f424c230279f8399242a3c503a3537a
font_01_sfnt_off00007e79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E79 2956 bytes
SHA-256: cc6ee08a5af07cdf809d5f718a6f4b581fc47059b13d069ac995502e41039ee4
font_02_sfnt_off0000889c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x889C 18464 bytes
SHA-256: a2c76306a813766f02d16bba13a6176cc917de49c90529db8e6e2ffa1e8149db

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