Malicious PDF — malware analysis report

Static analysis result for SHA-256 13b47e30e8b2ae3a…

MALICIOUS

PDF

41.1 KB Created: 2021-05-21 12:05:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 27aa99d9e77f6d22f5dfaf406aa0ad74 SHA-1: 6be0ae112763ef4bb6e1f48814802081f21271af SHA-256: 13b47e30e8b2ae3a4e66af9b0336a6eb25ba8a4f6c96b2587ecbb07e7b8b9805
160 Risk Score

Malware Insights

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

The PDF contains multiple links to known malicious redirectors and infrastructure, disguised as "free generators" for popular games. The ML classifier also flagged the document as malicious. The primary attack pattern involves luring the user to click these links, which likely leads to further malicious content or exploits. No scripts were extracted, but the presence of malicious links and the lure suggest a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7465

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/431946152/roblox-free-no-download-game-hack In PDF document text
    • http://cosmosdawn.net/images/minecraft-116-free_GM479516143.pdfIn PDF document text
    • http://cosmosdawn.net/images/offers-for-robux_GM431946152.pdfIn PDF document text
    • https://www.cosmosdawn.net/images/how-to-hack-minecraft-pe_GM479516143.pdfIn PDF document text
    • https://www.cosmosdawn.net/images/coin-master-free-shield_GM406889139.pdfIn PDF document text
    • http://cosmosdawn.net/images/free-robux-codes-no-verification-2021_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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003205.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3205 25460 bytes
SHA-256: 894c0ba3c700f9bd93de82d00900b924606242b0971c3c9b2c9982f9775e1bf4
font_01_sfnt_off00006bec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6BEC 7448 bytes
SHA-256: a76ff9b4805dcff342f7268a16e2e3c2ff2b31b96c381fe4deb6ceea777bce90
font_02_sfnt_off00007dcf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7DCF 18680 bytes
SHA-256: 594f974c71c1e9b72d2021421f5ea77f9f9dd5e689ba96d2b51dc4efe6f30b0b

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