Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d987ac5ab3d441e…

MALICIOUS

PDF

72.2 KB Created: 2020-11-14 05:02:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 5bad29e4cb74bb95bb108e30208c5cb9 SHA-1: b7bee4ba1477f7f0cb12c46c65963edd74c3af3a SHA-256: 5d987ac5ab3d441e409da48ae073836cb1b84f33e95bac3e8ff102bba076b716
214 Risk Score
Tags
free-cdn-ebook-manual-lure

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 and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

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://traffmen.ru/123?utm_term=my+iceberg+is+melting+pdf In PDF document text
    • https://najuxobetejip.weebly.com/uploads/1/3/4/2/134265875/62b22ec4e.pdfIn PDF document text
    • https://puduwoziwipaja.weebly.com/uploads/1/3/4/7/134724575/f6c98a.pdfIn PDF document text
    • https://zilakakazaxo.weebly.com/uploads/1/3/4/4/134442972/wemolewapixiwos.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380229/normal_5f9035b8ec82d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf250e52-c3d0-41d4-a5d5-364150715fcb/gunetigarataduvagolibeka.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f6283d3-2529-4261-bf02-ea8d1f84397f/muwitosokuvizepul.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5bf6d28b-0a7e-4752-8dfd-fa68e8da8245/radically_open_dbt_skills_training_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ce8c1108-b3fa-49d1-8913-66a25fc6f416/52926802697.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/84349712116.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3c0f9b85-90a1-4748-84b0-1a3421ae5c55/rakomimenatagelurixi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb69152a-241e-47e4-94a3-c9f2ca2cfa6a/70916798323.pdfIn PDF document text
    • https://s3.amazonaws.com/sabobenuwe/construction_business_plan_format.pdfIn PDF document text
    • https://s3.amazonaws.com/pogolo/2016_louisville_slugger_z4_balanced.pdfIn PDF document text
    • https://s3.amazonaws.com/vofosuvuwapiwo/biomes_o_plenty_apk.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_off0000dd91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD91 5512 bytes
SHA-256: 659c9b56f6903f748c5d0018175fe570a2441e855985b4fea76f887a38b5e88a
font_01_sfnt_off0000f04e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF04E 10532 bytes
SHA-256: 4ed7d84e8322dccd432d3c759514b6bb35ee3e5d5aa4344268a6b1eb24da5eb6

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