Malicious PDF — malware analysis report

Static analysis result for SHA-256 f690d31af0e2d2c8…

MALICIOUS

PDF

33.8 KB Created: 2021-07-05 07:32:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 62f12e8f99a5645261ac6824763b6985 SHA-1: 2209dc91980b05a15942796d2d4036421558aeb5 SHA-256: f690d31af0e2d2c885af02d6263c8b871e975ef07b6195f3b9d097560cd815dc
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains embedded links that redirect to known malicious infrastructure, specifically advertising free game hacks and generators. The document body and heuristics indicate a lure to trick users into clicking these links, likely leading to further malware downloads or phishing pages. No scripts were extracted, but the PDF structure itself facilitates the redirection.

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/406889139/free-coin-coin-master-game-hack In PDF document text
    • https://dentmate.com.tw/image/data/files/claim-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://dentmate.com.tw/image/data/files/battle-royale-hacks-jailbreak-roblox_GM431946152.pdfIn PDF document text
    • https://dentmate.com.tw/image/data/files/daily-coin-master-free-link_GM406889139.pdfIn PDF document text
    • https://dentmate.com.tw/image/data/files/free-coin-coin-master_GM406889139.pdfIn PDF document text
    • https://dentmate.com.tw/image/data/files/coin-master-card-collection-link_GM406889139.pdfIn PDF document text
    • https://dentmate.com.tw/image/data/files/roblox-black-shirt-free_GM431946152.pdfIn PDF document text
    • https://dentmate.com.tw/image/data/files/how-to-hack-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • https://dentmate.com.tw/image/data/files/the-day-roblox-got-hacked_GM431946152.pdfIn PDF document text
    • https://dentmate.com.tw/image/data/files/coin-master-free-daily-spins-link_GM406889139.pdfIn PDF document text
    • https://dentmate.com.tw/image/data/files/free-spins-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://dentmate.com.tw/image/data/files/free-2021-account-roblox_GM431946152.pdfIn PDF document text
    • https://dentmate.com.tw/image/data/files/apk-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://dentmate.com.tw/image/data/files/free-robux-com_GM431946152.pdfIn PDF document text
    • https://dentmate.com.tw/image/data/files/robux-cheat-hack_GM431946152.pdfIn PDF document text
    • https://dentmate.com.tw/image/data/files/free-coins-and-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://dentmate.com.tw/image/data/files/roblox-free-printable-coloring-pages_GM431946152.pdfIn PDF document text
    • https://dentmate.com.tw/image/data/files/mcpe_GM479516143.pdfIn PDF document text
    • https://dentmate.com.tw/image/data/files/how-to-get-free-roblox-money-on-ipad_GM431946152.pdfIn PDF document text
    • https://dentmate.com.tw/image/data/files/how-to-get-free-robux-without-verifying-2021_GM431946152.pdfIn PDF document text
    • https://dentmate.com.tw/image/data/files/coin-master-free-spin-and-coin-link-haktuts-hacking-news_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
stream_002_off00002f7b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2F7B 22608 bytes
SHA-256: bc30e84206764a2ecf64d1d08981350f03e6e4668ed198375003f7203f64161a
font_01_sfnt_off00006213.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6213 17996 bytes
SHA-256: e3fb1ca426c01543f38f1d1129ae452bef28a40365fbe99abf1b239340e30419

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