Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc888f76953c1eca…

MALICIOUS

PDF

66.6 KB Created: 2020-12-24 14:02:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 041962a09e48d0361075f5561824e557 SHA-1: dab49292da6c3a519a414016dc305182131c4e00 SHA-256: fc888f76953c1eca036aca1e698934aa002c4b9089e574fdf8e5e782a69d0c1a
212 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged by multiple heuristics as malicious, including a critical alert for linking to known malicious redirector infrastructure. It also exhibits characteristics of a PDF link farm, with numerous external links. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the heuristics suggest a phishing or redirection attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6640

Heuristics 4

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://ggtraff.ru/aws?utm_term=crazy+craft+2019
    • https://mizunemaki.weebly.com/uploads/1/3/4/8/134850414/lijudalogax.pdf
    • https://static.s123-cdn-static.com/uploads/4476446/normal_5fe3189282fb5.pdf
    • https://cdn-cms.f-static.net/uploads/4368244/normal_5fa75818480f7.pdf
    • https://cdn.sqhk.co/titolegun/fll5igR/3288096336.pdf
    • https://cdn-cms.f-static.net/uploads/4365541/normal_5f96f9759a489.pdf
    • https://cdn-cms.f-static.net/uploads/4500692/normal_5fd7ae0e2fb81.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/33af3bec-4687-4d6c-9c0b-c38313514f05/73164547749.pdf
    • https://uploads.strikinglycdn.com/files/57355610-5cde-4be7-9bf1-4dcf5fb84918/9184082211.pdf
    • https://uploads.strikinglycdn.com/files/61e14558-1a52-4aae-8a46-621c58a98473/driver_handbook_haitian_creole.pdf
    • https://uploads.strikinglycdn.com/files/72af19ab-1dd2-41cc-bf03-0bbe7da23ccb/89504920326.pdf
    • https://uploads.strikinglycdn.com/files/a139cd4f-3ead-477f-854e-0e7602b21923/paris_school_of_economics_ranking.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d33d.bin
ef7c786eb7f2ec824cd13f62250dce33c9e82f8bed5303d104f7e55e4beab5e9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD33D 4728 bytes
font_01_sfnt_off0000e36a.bin
490db622d03f878e3441f5361de2e6c58026d392269a50292a3d63e2c16d8933		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE36A 10504 bytes

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