Malicious PDF — malware analysis report

Static analysis result for SHA-256 829de3b4457ab6a3…

MALICIOUS

PDF

74.9 KB Created: 2021-05-10 18:43:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 69070fa364cc6166476271ce972f4d14 SHA-1: 9f0bbeaac4bdcb24675a7aefdefb310315eba10a SHA-256: 829de3b4457ab6a3c04a8ac50f80ef5e91ac853f028356a3aa3c5e33baadff07
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 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://jacksth.ru/strik?utm_term=ab+positivo+pode+doar+para+quem PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4382771/normal_600cf5f86ab16.pdfIn PDF document text
    • https://juwujumatel.weebly.com/uploads/1/3/4/0/134042908/435965.pdfIn PDF document text
    • https://webemimerur.weebly.com/uploads/1/3/1/3/131380848/2271363.pdfIn PDF document text
    • https://zakosolegim.weebly.com/uploads/1/3/5/3/135337695/342f1a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380674/normal_5fcf6d9cb1095.pdfIn PDF document text
    • https://mogewojelepa.weebly.com/uploads/1/3/4/6/134681452/sefezixu.pdfIn PDF document text
    • https://jitebemaduk.weebly.com/uploads/1/3/4/6/134692965/dubejerisesi_xarudifebe.pdfIn PDF document text
    • https://pawonojureva.weebly.com/uploads/1/3/4/5/134522231/xaxotupevagelem_gimozi.pdfIn PDF document text
    • https://regamozinog.weebly.com/uploads/1/3/0/9/130969170/402dea.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/ab7a61f7-61f6-45d2-873e-a1c35c87b232/comment_scanner_un_document_avec_hp_deskjet_2547.pdfIn PDF document text
    • http://nulazuwob.rf.gd/brochure_design_template_freepik.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5877fec0-89c8-4ee5-921d-40fbba2b84c1/kekoted.pdfIn PDF document text
    • http://lajofekozorofa.rf.gd/bring_me_to_life_sheet_music.pdfIn PDF document text
    • http://javewexo.epizy.com/gibudafem.pdfIn PDF document text
    • http://sowezenuvafe.epizy.com/jawogisixakofilivegek.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ca24abb3-6710-4bac-b49c-f6bedb3813bd/76658311034.pdfIn PDF document text
    • http://sitibus.epizy.com/nawixexel.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_off0000e566.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE566 5388 bytes
SHA-256: a85fc3b9a793233e82be2737adbde788d3dc865406ef80d16989e21ca2c03934
font_01_sfnt_off0000f7a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7A0 12928 bytes
SHA-256: 78f3fe6a7d8d90941a4ba897c1b5474cdf9209f2951171c7ad05dc52c29aba96

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