Malicious PDF — malware analysis report

Static analysis result for SHA-256 5909fc60cfbd595a…

MALICIOUS

PDF

41.3 KB Created: 2021-05-24 19:35:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 4cbdffb693196ee26aeb26f43a8a857c SHA-1: 870759f330687c02552dc289cb1573d07bca511b SHA-256: 5909fc60cfbd595aac702cc0a2d146d84fd012d6b9bfcf1d0d38ef7126c94fda
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, specifically advertising 'free generators' and 'game hacks' to lure users. The document body and embedded links suggest a phishing attempt to redirect users to malicious websites, likely for credential harvesting or further malware delivery. The presence of embedded URLs and the ML classifier's high confidence score support this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7409

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/how-to-get-free-robux-without-verifying-game-hack In PDF document text
    • http://zarinnameh.ir/images/minecraft-dungeons-free-download_GM479516143.pdfIn PDF document text
    • http://zarinnameh.ir/images/omplete-surveys-for-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://zarinnameh.ir/images/hack-coin-master-free_GM406889139.pdfIn PDF document text
    • http://zarinnameh.ir/images/coin-master-cheats-for-free-spins_GM406889139.pdfIn PDF document text
    • http://zarinnameh.ir/images/free-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off000035c3.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x35C3 25336 bytes
SHA-256: 21ba3b2093cf9d50f7deb6569fb9cb28afdd60715659347632ef580e5ca346e2
font_01_sfnt_off0000702a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x702A 5596 bytes
SHA-256: 9a13c2580265a78e8a7257496a31ee0055738af7e20a5661c2902efe4bf05ce5
font_02_sfnt_off00007cd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7CD2 19368 bytes
SHA-256: 63de63cfc252acdf530e8b3b2390dbc20d855d9653817057ed506b48c41b68ab

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