Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1ea43def123bd9e…

MALICIOUS

PDF

70.8 KB Created: 2021-06-08 15:36:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 23a8b22c1b75be1464e86d8f569e9f28 SHA-1: e92ba83c685f086b6a8c7b48ab02c803a1bc526a SHA-256: e1ea43def123bd9ec2c9917d49a2978b8cba4758ae3aefa7c958da8f69d6cdc3
186 Risk Score

Malware Insights

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

The PDF document was flagged by multiple heuristics as a brand-impersonation credential phishing lure, specifically impersonating LinkedIn. It contains embedded URLs that redirect to malicious sites, likely for credential harvesting. The ML classifier and ClamAV detection strongly indicate malicious intent.

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
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://gakofalu.weebly.com/uploads/1/3/1/6/131636889/9ba61dfc1d3d15.pdf.
  • 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://drafthe.ru/pbw?utm_term=associate+creative+director+job+description+pdf PDF link annotation
    • https://gakofalu.weebly.com/uploads/1/3/1/6/131636889/9ba61dfc1d3d15.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478664/normal_602a36e34ee13.pdfIn PDF document text
    • https://latitidazus.weebly.com/uploads/1/3/4/0/134018806/529815.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489440/normal_6057a85067333.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488570/normal_605069ae12f99.pdfIn PDF document text
    • https://pivisagut.weebly.com/uploads/1/3/2/8/132815367/207c2b3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380523/normal_5fc776494a872.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478926/normal_6049e59603657.pdfIn PDF document text
    • https://kadeborejegan.weebly.com/uploads/1/3/2/7/132740978/wujinulezagibevowu.pdfIn PDF document text
    • https://sirazetagur.weebly.com/uploads/1/3/5/3/135328448/bosadakopiresuj_jesozudezu.pdfIn PDF document text
    • https://tewedarutomos.weebly.com/uploads/1/3/2/3/132302993/jodemibigujomivub.pdfIn PDF document text
    • https://duwaratax.weebly.com/uploads/1/3/4/6/134621450/eaab6b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fijinatuzut.pbworks.com/f/29971330910.pdfIn PDF document text
    • http://sipibujewadu.pbworks.com/f/how_to_do_path_analysis.pdfIn PDF document text
    • http://juzifezazuk.pbworks.com/w/file/fetch/144806817/49605293660.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6687e810-452c-4792-b3e8-6e3b0778cc30/37191038206.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/64e261de-42ae-4040-be76-3f7c2f69c504/70876141666.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/41ffa44f-2421-4eab-8b6e-006784e7009d/tomtom_go_600_battery_not_charging.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_off0000d713.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD713 5384 bytes
SHA-256: 74a5203c67e42ac52ff6a382893ea9b8ed00a6f531ab4d6a9906403ace14dc19
font_01_sfnt_off0000e97a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE97A 10536 bytes
SHA-256: 86b73840d388a08a0989f275b0f3c699e7ef15a65165754d1a30917003cc5767

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