Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e2fb28669787374…

MALICIOUS

PDF

73.3 KB Created: 2020-11-26 09:07:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 15ef0e524ac1a5b1b78e7415a8c7f226 SHA-1: d5f018c42ddded2251c036927c681fd119daf49c SHA-256: 4e2fb28669787374e88c83b64ceda4ff48b189a392a51075c660f5153a2f5c50
186 Risk Score

Malware Insights

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

The PDF document contains numerous external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with techniques used to deliver second-stage payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://trafffi.ru/strik?utm_term=sample+letter+for+school+district+transfer PDF link annotation
    • https://fadusoga.weebly.com/uploads/1/3/0/7/130739873/mefadivafedo.pdfIn PDF document text
    • https://jipepusubame.weebly.com/uploads/1/3/4/0/134040653/7181293.pdfIn PDF document text
    • https://tesegedoveveda.weebly.com/uploads/1/3/4/8/134891870/kitoj-fabujeledapor.pdfIn PDF document text
    • https://varipejat.weebly.com/uploads/1/3/0/7/130739080/rilopenatoxelogapil.pdfIn PDF document text
    • https://bageribo.weebly.com/uploads/1/3/4/5/134592059/7417965.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392472/normal_5fa5d4def37ce.pdfIn PDF document text
    • https://wipomozexabezi.weebly.com/uploads/1/3/0/7/130776841/gijimosoleneziz_vaduzuve_jebobodu_tezuvikufuba.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/3eb671c1-450a-4c8d-8744-f46fc8050265/batman_animated_series_episode_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f44ae02f-53da-4e2d-b133-d74bab8dc6ba/art_sites_like_deviantart_2020.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d2eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2EB 5288 bytes
SHA-256: cfa66b8b2678d3a0d0907902865e714d259d6275a83a3e88d1ddefd579f5eabd
font_01_sfnt_off0000e4b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4B3 10968 bytes
SHA-256: f9dcdc8399df9887b2038dcecf137b02913bd73fee6200e06be649048dcd83dd
font_02_sfnt_off00010a39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A39 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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