Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1dcd41231f86cd8…

MALICIOUS

PDF

37.5 KB Created: 2021-05-23 23:40:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: fe08bf4e5b0c8b855ac674aa946a3e8f SHA-1: ac0958f213db41b80c074adc0b256a9bc477d8f3 SHA-256: f1dcd41231f86cd89610f1754bf6f542de39a0b1dc77562371043a2e477bc949
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors and lures users with promises of game hacks. The embedded URLs and the document body content strongly suggest a phishing or scam attempt designed to lead users to potentially malicious websites. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9447

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/479516143/minecraft-bedrock-free-with-java-game-hack In PDF document text
    • http://elearnfactory.com/images/coin-master-hack-app-android_GM406889139.pdfIn PDF document text
    • http://elearnfactory.com/images/roblox-password-hacker_GM431946152.pdfIn PDF document text
    • http://elearnfactory.com/images/get-free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • http://elearnfactory.com/images/roblox-prison-life-hack_GM431946152.pdfIn PDF document text
    • http://elearnfactory.com/images/coin-master-free-spins-and-coins-link-blogspot_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_off000035bc.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x35BC 25464 bytes
SHA-256: c6284fd51b44828286533da8708a724ce72f9449cce8ee2540d81bedbb955200
font_01_sfnt_off00006f6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F6B 18912 bytes
SHA-256: 4030f6649d0ebdd9f19ba86bdfab3d907e637ec7756e67114778b3c35e301262

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