Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d758a347bd960ae…

MALICIOUS

PDF

72.4 KB Created: 2021-02-27 09:47:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: dd60ddb541506aee9a89401cc3a7ef4e SHA-1: 1adc7b23d9e0404ad91b46111d785b51ba022c29 SHA-256: 0d758a347bd960aee6c75c0bb950443dcc368aebe09342ee3b917e409c588df6
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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. 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-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://seumenha.ru/123?utm_term=how+to+show+weather+on+screen PDF link annotation
    • http://namedaun.fun/diy_wood_ideas_for_saleo93q5.pdfIn PDF document text
    • http://sacredname.ru/82421211273zdboz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447276/normal_5fd147b1b655d.pdfIn PDF document text
    • http://antonioita.fun/dozetasekejunojilodzob2x.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391620/normal_602ef25d6864b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485807/normal_602939f52cbc9.pdfIn PDF document text
    • https://cdn.sqhk.co/womawuxinuge/0hcjdjh/6_pack_beer_cooler.pdfIn PDF document text
    • http://strapslap.online/abidjan_principlesy5mpq.pdfIn PDF document text
    • http://lnstagramverifiedbadge-form.com/virgil_aeneid_book_1_literal_translationyfk1a.pdfIn PDF document text
    • http://drive4mclaneeffingham.com/228401783070fz4l.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369633/normal_602878fb9f8c8.pdfIn PDF document text
    • https://cdn.sqhk.co/kagalitisup/ji8gdAE/blood_and_glory_2_ios.pdfIn PDF document text
    • http://nitesufi.sportsontheweb.net/english_idioms_dictionary_download.pdfIn PDF document text
    • http://mxbur.fun/alamy_stock_freec506h.pdfIn PDF document text
    • http://bluetea.space/miwilababgj0r.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481285/normal_600678ae3a3a3.pdfIn PDF document text
    • http://cleaner-inn.club/26671074110m6qo9.pdfIn PDF document text
    • https://cdn.sqhk.co/rajemaramiw/6hgr0gc/jikevas.pdfIn PDF document text
    • https://cdn.sqhk.co/fesakesovoka/ejaLsih/bewitched_halloween_runner.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000dec1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEC1 4908 bytes
SHA-256: 12690b6f7c6a50e9b465139fbc330edd61f7c4c6a579018bbc6d96c24e78af1a
font_01_sfnt_off0000ef7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF7A 10744 bytes
SHA-256: 39d860bf0679ec08c2359e7eca2cae5b9d64e089ae2aedde7d04a06ead05712f