Malicious PDF — malware analysis report

Static analysis result for SHA-256 c365983e20e1845e…

MALICIOUS

PDF

66.9 KB Created: 2021-03-01 22:57:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: e37254d3db3c7816e1440d1fddf895c6 SHA-1: b0303882f614a647c077dbfa00d01508c4d441d2 SHA-256: c365983e20e1845e2ac67248228981e3edfd225668fa7e82961a77640cdac994
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF document contains numerous embedded URLs, many of which point to disposable hosting and are used in a link farm, a common tactic for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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://resalured.ru/strik?utm_term=software+testing+jobs+in+michigan PDF link annotation
    • https://cdn.sqhk.co/pipujevi/glgjja9/telemowev.pdfIn PDF document text
    • http://macsk.space/excel_vba_worksheetfunction_listu21az.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456398/normal_602b5109e40b3.pdfIn PDF document text
    • http://golixudib.mypressonline.com/how_to_fix_metabolic_acidosis_on_vent.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381962/normal_5ff967e07d7c7.pdfIn PDF document text
    • http://liwokat.iblogger.org/zijelonemo.pdfIn PDF document text
    • http://xawexusinuzo.22web.org/new_york_state_acknowledgement_of_paternity_form.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410679/normal_5fff4ff22a53d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454990/normal_60090d0b27ff8.pdfIn PDF document text
    • http://biomaniks.website/esma_guidelines_remuneration_mifidad092.pdfIn PDF document text
    • https://cdn.sqhk.co/zubavagi/102jVij/28931813405.pdfIn PDF document text
    • http://cmbclientes.com/uniform_store_in_southland_mall_memphis_tnbakii.pdfIn PDF document text
    • https://cdn.sqhk.co/zodavujera/mfwjbif/dinosaur_offline_game_cheats.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://botalibinizor.rf.gd/crash_course_world_history_6_answer_key.pdfIn PDF document text
    • http://zolivowubek.epizy.com/omegle_app_uptodown.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c95c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC95C 5672 bytes
SHA-256: b3e683aa05e58ace841902b4acccc9b9ef7174ddf62937f1dc6847d36ad4bd6f
font_01_sfnt_off0000dc98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC98 10032 bytes
SHA-256: 14749b2d61b20fe445bb126da8196d4a809828a7b889bfa4d93aa23bb5185641

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