Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba85382c12564317…

MALICIOUS

PDF

33.4 KB Created: 2021-07-03 15:22:16 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 9eeb71360a0fc495accb78b9a7980428 SHA-1: 564836c804f6862e2d8df3063ca23900cdee3c01 SHA-256: ba85382c12564317467e0c775f0ae577d3d2c188b86dea0fda8ae1880c9b31d9
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded links and text that lure users into clicking on a "free generator / game hack" which redirects to malicious infrastructure. The primary URL identified is http://netcdn.tw/app/431946152/free-robux-link-game-hack. While no scripts were extracted, the document's structure and embedded URLs strongly indicate a phishing or scam attempt, likely leading to further malware download or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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/431946152/free-robux-link-game-hack In PDF document text
    • https://esl.hess.com.tw/image/data/files/roblox-online-hack-no-verification_GM431946152.pdfIn PDF document text
    • https://esl.hess.com.tw/image/data/files/free-robux-groups-2021_GM431946152.pdfIn PDF document text
    • https://esl.hess.com.tw/image/data/files/minecraft-auto-miner-hack_GM479516143.pdfIn PDF document text
    • https://esl.hess.com.tw/image/data/files/how-to-get-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • https://esl.hess.com.tw/image/data/files/coin-master-hack-no-survey_GM406889139.pdfIn PDF document text
    • https://esl.hess.com.tw/image/data/files/coin-master-date-and-time-hack_GM406889139.pdfIn PDF document text
    • https://esl.hess.com.tw/image/data/files/how-to-hack-roblox-to-get-robux_GM431946152.pdfIn PDF document text
    • https://esl.hess.com.tw/image/data/files/coin-master-spin-free_GM406889139.pdfIn PDF document text
    • https://esl.hess.com.tw/image/data/files/how-to-get-free-robux-no-generator-no-survey_GM431946152.pdfIn PDF document text
    • https://esl.hess.com.tw/image/data/files/ww-roblox-come_GM431946152.pdfIn PDF document text
    • https://esl.hess.com.tw/image/data/files/how-to-start-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • https://esl.hess.com.tw/image/data/files/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • https://esl.hess.com.tw/image/data/files/robux-foxy-cheats_GM431946152.pdfIn PDF document text
    • https://esl.hess.com.tw/image/data/files/roblox-free-robux-no-download-or-survey_GM431946152.pdfIn PDF document text
    • https://esl.hess.com.tw/image/data/files/free-robux-generator-2021-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • https://esl.hess.com.tw/image/data/files/coin-master-free-spins-link-blogspot_GM406889139.pdfIn PDF document text
    • https://esl.hess.com.tw/image/data/files/roblox-promo-codes-for-free-robux_GM431946152.pdfIn PDF document text
    • https://esl.hess.com.tw/image/data/files/free-robux-no-verification-or-survey_GM431946152.pdfIn PDF document text
    • https://esl.hess.com.tw/image/data/files/free-robux-generator-no-verification_GM431946152.pdfIn PDF document text
    • https://esl.hess.com.tw/image/data/files/offers-to-complete-and-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002ed9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2ED9 21284 bytes
SHA-256: 12103603beb875b3cab8dd58287a233dbbd4fa3414236baa92d3fc301cfed41f
font_01_sfnt_off00005d6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D6D 19008 bytes
SHA-256: a11a737a93c2cddb47bbb5a91c346e1b782ee8df03973ee462993f1f8904f3c0

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