Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a6a05c9a3d8c4fb…

MALICIOUS

PDF

40.8 KB Created: 2021-05-23 19:49:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 37b5831cdb2bdf51e737e42ef2847e97 SHA-1: 788a80e86073231dad93b0ca604a6309e8c03422 SHA-256: 5a6a05c9a3d8c4fba39065a20b4af5b7132034f7521794897e3007527506364f
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links that redirect to known malicious infrastructure, specifically advertising free game hacks and generators. The document body and embedded link targets strongly suggest a phishing or scam lure to entice users to visit malicious sites. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7445

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/rbx-gg-free-robux-game-hack In PDF document text
    • https://hekl-software.de/images/spin-free-coin-master_GM406889139.pdfIn PDF document text
    • https://hekl-software.de/images/moonactive-coin-master_GM406889139.pdfIn PDF document text
    • https://hekl-software.de/images/se-puede-hackear-coin-master_GM406889139.pdfIn PDF document text
    • https://hekl-software.de/images/real-robux-generator_GM431946152.pdfIn PDF document text
    • https://hekl-software.de/images/minecraft-games-free-download_GM479516143.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_off0000312a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x312A 28324 bytes
SHA-256: 114604a7ad9f97c724659c9e99b81af4a364985dd2a2e3e7965f8e0c9ad9a414
font_01_sfnt_off0000715e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x715E 5596 bytes
SHA-256: 9a13c2580265a78e8a7257496a31ee0055738af7e20a5661c2902efe4bf05ce5
font_02_sfnt_off00007e06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E06 18304 bytes
SHA-256: d1ad45f5b083d36c6ec4c124be04f92537ae8dd31535970cb7662339535ad89d

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