Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a9ced42fb7c1f19…

MALICIOUS

PDF

40.8 KB Created: 2021-05-23 16:35:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 11bb65de8e81640831480e56ad2d63b7 SHA-1: 8569567e35112048e8e2fb1a82e139c25eadcebe SHA-256: 6a9ced42fb7c1f19fd2d2fab1b34de017cb558f38a08c1a905cfdf7a7b69bfa1
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded links that redirect to malicious infrastructure, masquerading as game hacks. The heuristic firings indicate the PDF is designed as a lure, with one rule specifically identifying it as a 'PDF_MALICIOUS_REDIRECTOR_LINK'. While no scripts were explicitly extracted, the nature of the embedded links suggests a potential for further malicious activity, such as downloading additional payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7508

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/is-minecraft-dungeons-free-game-hack In PDF document text
    • http://ag-metal.fr/images/offers-to-complete-and-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://ag-metal.fr/images/coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://ag-metal.fr/images/https-iosgodscom-topic-20214coinmasterhack_GM406889139.pdfIn PDF document text
    • http://ag-metal.fr/images/how-you-get-robux_GM431946152.pdfIn PDF document text
    • http://ag-metal.fr/images/coin-master-free-2021-spin-link-today_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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off0000376b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x376B 29160 bytes
SHA-256: 8998ef2688ae71fdce237da75c61b0bdf45107c2506b540af7ba6b36efffe5f0
font_01_sfnt_off00007443.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7443 2824 bytes
SHA-256: 61b3a573627d4f03d30684157e1627da3b4499cefab0fdf17b45999135b0250b
font_02_sfnt_off00007dea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7DEA 18304 bytes
SHA-256: ce690126d5ef6938f3c3401fec90eb29b657d34ca06495398573f2a883063706

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