Malicious PDF — malware analysis report

Static analysis result for SHA-256 a34f057b7b22f683…

MALICIOUS

PDF

37.9 KB Created: 2021-05-21 01:23:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-11
MD5: c6eac2cd815dfadc88f79bd81716b4e3 SHA-1: 8d709d843c7c3539318e00404eb5052c27abc0ab SHA-256: a34f057b7b22f6834565a8a2b667a2551939e8373ef1a6474fe1452a9b1b9bcb
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, masquerading as game hacks or generators. The document body and embedded links explicitly mention 'free generator' and 'game hack' lures, aiming to trick users into clicking through to malicious infrastructure. The presence of multiple malicious PDF links suggests a chain of infection designed to deliver further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9407

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/how-to-get-minecraft-for-free-on-xbox-game-hack In PDF document text
    • http://esm-royet.de/images/free-robux-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • http://esm-royet.de/images/mcpe-master-hack-unlimited-coins_GM406889139.pdfIn PDF document text
    • http://esm-royet.de/images/roblox-t-shirt-free_GM431946152.pdfIn PDF document text
    • http://esm-royet.de/images/coin-master-free-attack_GM406889139.pdfIn PDF document text
    • http://esm-royet.de/images/coin-master-hack-link-2021_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off000038aa.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x38AA 25628 bytes
SHA-256: 22b67a74b50164ffe31c0512c3ec7add8da7c922ec5cb719bdd5d69f62317842
font_01_sfnt_off00007231.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7231 18472 bytes
SHA-256: 63446f7755945d37ec8b97d22fda434cb08cbf4c61a02f7f94d2af605f03b611

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