Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2eb696cd4e58e1e…

MALICIOUS

PDF

67.8 KB Created: 2020-11-14 03:47:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: e352979c59a44f35f76f4fa00fb659a9 SHA-1: d510066624001fa3f26186380b22b8cff1ffd1ee SHA-256: c2eb696cd4e58e1ec66859c5d94c1e6d1563a26dbbcf9f5ab4503c96d0a10412
186 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm designed to redirect users. The document body is heavily obfuscated and appears to be a lure, possibly related to the embedded URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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://traffset.ru/strik?utm_term=uzun+laf%25C4%25B1n+k%25C4%25B1sas%25C4%25B1+kitap PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4409394/normal_5f9e798393cea.pdfIn PDF document text
    • https://kavanezeso.weebly.com/uploads/1/3/4/4/134477356/mazafasu_jobowaroxesu_gefeweguvisozen.pdfIn PDF document text
    • https://mufalugibesenu.weebly.com/uploads/1/3/1/4/131453255/fc728.pdfIn PDF document text
    • https://ditiwudo.weebly.com/uploads/1/3/1/4/131452947/rotezenisixeve-lizenovo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403823/normal_5f914d55bb9d2.pdfIn PDF document text
    • https://ziperivowupidu.weebly.com/uploads/1/3/1/3/131381589/dd012825c3171d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383304/normal_5f9176d3f3bd1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4502870/normal_5fac3092cb85b.pdfIn PDF document text
    • https://figerifefiter.weebly.com/uploads/1/3/4/3/134343277/josop-vujapiki-ruwozisumi-pisebugutelum.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390659/normal_5f95346d8448f.pdfIn PDF document text
    • https://ravusosu.weebly.com/uploads/1/3/4/5/134589623/tesarolarifi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387573/normal_5f9c340847a7e.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/ee8027cc-0977-454d-b317-23296847b9db/simple_and_clean_piano_sheet_music.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ee14d27b-373b-4af1-9fa7-18cbb2c96ca3/606491746.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_off0000c804.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC804 4936 bytes
SHA-256: c83ff532dd999dcd055b3888debafb5485a5a16fc13fccfccb4f63c1a628e6b9
font_01_sfnt_off0000d8fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8FD 12844 bytes
SHA-256: 15fbdabe929f03f395755896615a689c8e06a21253e181a0ab95d40a0f1b7533

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