Malicious PDF — malware analysis report

Static analysis result for SHA-256 38bad07b1617386c…

MALICIOUS

PDF

33.6 KB Created: 2021-07-06 08:17:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 41b9f0e68e42670ee8a8404dfd540fd9 SHA-1: 11c6b7ebc80a16a466659a01e7b62d505fd64591 SHA-256: 38bad07b1617386cc3c4a16f413c273b53ed5c9d730d8463cf368f5661da19cb
160 Risk Score

Malware Insights

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

The PDF document contains a lure related to game hacks and redirects to a known malicious URL. The ML classifier also flagged this PDF as malicious. The primary attack pattern involves tricking the user into clicking a link that leads to malicious infrastructure, likely for further exploitation or malware delivery.

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/how-to-coin-master-hack-game-hack In PDF document text
    • http://library.umuslim.ac.id/repository/free-robux-thumbnail_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/free-robux-website_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/how-to-get-roblox-money_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/roblox-hacks-s_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/coin-master-free-spin-today_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/free-robux-hacks-no-verification_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/free-robux-not-fake_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/roblox-arsenal-aimbot-hack-download_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/game-freak-free-robux_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/free-games-like-coin-master_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/free-roblox-items-catalog_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/free-robux-if-join-group_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/roblox-destruction-simulator-hack-2021_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/free-robux-hack-generator-download_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/free-roblox-gift-card-website_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/hack-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/free-robux-generator-2021-no-scam_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/hack-de-como-tener-robux-gratis_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/gana-500m-de-robux-con-este-hack-2021-100-real_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
stream_002_off00002e40.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2E40 22680 bytes
SHA-256: 652c21daac6dfdb5352a0f7cd579b30eb20e7aa6a7a00d9c4dbaebc4633b9fc7
font_01_sfnt_off000060f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60F0 18168 bytes
SHA-256: e47dd8d3aaf8a10f54122630656b1727a6bc07b24b8f1c8f2f2e2ed5214c4059

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