Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e0617730f0d88e1…

MALICIOUS

PDF

59.1 KB Created: 2020-11-13 15:50:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 8857d8ba87ee3f0e109633c788b58675 SHA-1: 9d697553875d995a57aa4c0494a87992498e8197 SHA-256: 8e0617730f0d88e164b4062ca58430200b1c75bb392f355dffcf3f680afc7c77
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://traffking.ru/strik?utm_term=pokemon+all+episodes+download+3gp PDF link annotation
    • https://mefemanodi.weebly.com/uploads/1/3/1/4/131454269/zodiz-dusamofovi-mamevivej.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377371/normal_5f9e21d346f6e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366350/normal_5f8d29720aade.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392853/normal_5f8e4e7b72ad4.pdfIn PDF document text
    • https://silepokow.weebly.com/uploads/1/3/4/3/134366863/1c0d15a6ad264a3.pdfIn PDF document text
    • https://finivoxub.weebly.com/uploads/1/3/4/3/134387593/suwimudigetos_kamulawufewebox.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374978/normal_5f8a301ea59be.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413465/normal_5f93fccfbfb7c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380413/normal_5fabc02f518d4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zupenafud/putupudebupudukivu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/199175f6-f170-46a9-9675-b35d0c6b71a0/juvapudosobup.pdfIn PDF document text
    • https://s3.amazonaws.com/pibabopuduj/dupont_reverse_osmosis_manual.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000a94a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA94A 5504 bytes
SHA-256: 0d3a5c9b1d9f609e10c4f00a133c225ed06538c9ce2f449ec2d27cc27deac89c
font_01_sfnt_off0000bc0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC0E 10068 bytes
SHA-256: 7582938e5abe71570adcdf60d78d1d9a39b525320d58bb36f360279d9a1e7f56