Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf44ac26f29b771b…

MALICIOUS

PDF

35.0 KB Created: 2021-07-05 12:09:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 6de4125d0bd0df255c300bc223fb7412 SHA-1: 310d0c83b558675fdd1b3042d618d2fa9a7cc0bf SHA-256: cf44ac26f29b771bc27d80f96e6387d950cddd2d3d0ad96ff120ed2efa84d393
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains links that redirect to known malicious infrastructure, specifically promoting game hacks and free currency. The heuristic firings indicate that the PDF is designed as a lure to redirect users to potentially harmful content. While no scripts were explicitly extracted, the nature of the links and the lure suggest an attempt to exploit user interest in free in-game items, likely leading to further malicious activity 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/406889139/monttechscom-coin-master-free-spins-game-hack In PDF document text
    • http://library.unissula.ac.id/fe/repository/how-to-get-free-robux-not-a-scam_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk//repository/daily-free-spins-coin-master-heaven_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/coin-master-hack-apk-35-11_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/nuevos-hacks-de-roblox-2021-benimo_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/robuxy-com-free-robux_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk//repository/roblox-free-pants_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/roblox-how-to-change-your-name-for-free-2021_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/how-to-get-the-sex-hack-on-roblox_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk//repository/coin-master-3rd-village-free-2021-gift-card_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/roblox-free-gift_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk//repository/free-robux-no-verification-at-all_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/how-to-get-free-robux-without-verification-2021_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/robux-hack-no-survey-no-human-verification_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/cool-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/free-robux-com_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/kuso-icu-roblox-hack_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/link-for-free-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/roblox-tuxedo-free_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/how-to-hack-any-roblox-game_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/flee-the-facility-hack-roblox_GM431946152.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_off000033ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x33AB 22544 bytes
SHA-256: 1da2a8e57c09f3038c9382fceae982c6261f5402ede3d4c64c9c1f78f3af1e64
font_01_sfnt_off0000659d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x659D 18600 bytes
SHA-256: cf10e1c73b91a9057371485db9e41fdbd99a25db1637158c8a65784560ead965

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