Malicious PDF — malware analysis report

Static analysis result for SHA-256 3687c8b71ea76225…

MALICIOUS

PDF

66.9 KB Created: 2020-11-26 07:30:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 85163d3568dcbe0313139ebe5df9dcda SHA-1: 12f1f936f512db879b8b93541a3dbd65daa56e02 SHA-256: 3687c8b71ea762257043ee74b5b6377ba0756be293663fdc9242295630919f4a
214 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one identified as a known malicious redirector. The ML classifier and ClamAV also flagged this PDF as malicious, indicating a phishing or malware distribution attempt. The presence of embedded links suggests an attempt to redirect users to malicious sites, potentially for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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.
  • 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://cctraff.ru/123?utm_term=snake+goddess+or+priestess In PDF document text
    • https://cdn-cms.f-static.net/uploads/4453730/normal_5fb2cc62c977d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466140/normal_5fb451193c5b9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366676/normal_5fad95dc55c6f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446502/normal_5fb2c499822c1.pdfIn PDF document text
    • https://litazivufili.weebly.com/uploads/1/3/4/3/134305244/dd34040f4aef.pdfIn PDF document text
    • https://jodobape.weebly.com/uploads/1/3/4/3/134317169/80f340c03a789.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/zetituri/2020_cosyne_meeting.pdfIn PDF document text
    • https://s3.amazonaws.com/zusevamasor/1922191699.pdfIn PDF document text
    • https://s3.amazonaws.com/faxaxos/planning_poker_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/novipaliwid/hockey_goalie_drill_template.pdfIn PDF document text
    • https://s3.amazonaws.com/xukonakefules/english_nursery_rhymes_mp4.pdfIn PDF document text
    • https://s3.amazonaws.com/dazutun/general_principles_of_software_validation_fda.pdfIn PDF document text
    • https://s3.amazonaws.com/lupuvogotog/volume_and_surface_area_of_3d_shapes.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_off0000cabc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCABC 5260 bytes
SHA-256: 899b72ad81a9ffc8e3f5cb4c8ce7a8d5b94514445f0f38e3f1cc5656bbd9c139
font_01_sfnt_off0000dcb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCB3 10104 bytes
SHA-256: b643ccaa85fc3bd6a01948600642434f0bc81b7035053b1fe7a968121c9ab639

Open this report in the interactive analyzer, or submit your own file for analysis.