Malicious PDF — malware analysis report

Static analysis result for SHA-256 c893e904aabf9263…

MALICIOUS

PDF

78.1 KB Created: 2021-03-22 00:01:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: c61e0959c319c8ec392f1a5bfa1e6f01 SHA-1: 279bdf5c6c7f7c77924376e2955ab1e4249a361e SHA-256: c893e904aabf9263d47ca2bb04691479d8a8fa745942b7d925e71c6c4638d8cf
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with one prominent URL pointing to a suspicious domain ('lozipotod.ru') that is likely part of a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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://lozipotod.ru/strik?utm_term=how+to+cancel+a+gym+membership+during+covid PDF link annotation
    • http://vojukew.iblogger.org/57549547926.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487622/normal_601dde5461afb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378846/normal_602d76a014f4b.pdfIn PDF document text
    • http://wavasesinile.22web.org/41610889866.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385434/normal_602560bb694b3.pdfIn PDF document text
    • https://mutazodot.weebly.com/uploads/1/3/0/8/130874237/2575185.pdfIn PDF document text
    • https://meputaxuxiku.weebly.com/uploads/1/3/5/3/135304120/toziwamabuxiv.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389792/normal_5fc761cbc9a37.pdfIn PDF document text
    • https://figunetu.weebly.com/uploads/1/3/4/3/134353482/koboti.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/gozifep/androidx_cardview_corner_radius.pdfIn PDF document text
    • http://dewifazegukom.epizy.com/nilofutulojizadaloli.pdfIn PDF document text
    • http://muvalinifotu.rf.gd/90327209652.pdfIn PDF document text
    • http://xijotat.rf.gd/st_joseph_baltimore_catechism_no_2.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ce995ad-d854-4c5e-80f4-9a1e4acc72e2/star_wars_ahsoka_disney_plus.pdfIn PDF document text
    • https://s3.amazonaws.com/tarizirefevifab/56927582412.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7fbe28a9-4274-4cd9-b06d-5b1e2a6177bf/62648050569.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_off0000f004.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF004 5844 bytes
SHA-256: 91ee0f2070aa9c8293800a23a6d522d69e3d7a6e64291ef6e6f729876e159519
font_01_sfnt_off000103c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103C8 11556 bytes
SHA-256: 1c06266ef1f3b5f3397a60e1c2bad5c26ef855aa6ba115602aececd32ca5a7ce

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