Malicious PDF — malware analysis report

Static analysis result for SHA-256 3005de19ba4335bc…

MALICIOUS

PDF

87.5 KB Created: 2021-06-11 21:43:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 4a689bc2fe4682091d33e283a3735d1c SHA-1: be4d85e4b482cfa67ec5647552a509b6f0a16d5a SHA-256: 3005de19ba4335bc33ef0975bca4a62b56e0c39182efa2e101fed2b435c21389
186 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, many hosted on disposable domains, indicating a link farm or phishing operation. The ML classifier and ClamAV detection strongly suggest malicious intent. The document body, though heavily obfuscated, appears to be a lure related to 'jewelry brands fight list answers', likely to direct users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://xezojetit.ru/123?utm_term=jewelry+brands+fight+list+answers PDF link annotation
    • https://zesidorav.weebly.com/uploads/1/3/1/4/131437831/9530852.pdfIn PDF document text
    • https://pupisisewovafon.weebly.com/uploads/1/3/4/5/134500239/vetavibebemifiku.pdfIn PDF document text
    • https://bamewubi.weebly.com/uploads/1/3/2/3/132303354/5180272.pdfIn PDF document text
    • https://dokarugosili.weebly.com/uploads/1/3/4/3/134362608/tirimoruvuzugo_pufadufi.pdfIn PDF document text
    • https://radalumimobexod.weebly.com/uploads/1/3/5/9/135957078/3404521.pdfIn PDF document text
    • https://vinovubetiloj.weebly.com/uploads/1/3/4/6/134679092/morakodebo.pdfIn PDF document text
    • https://mexupapomumag.weebly.com/uploads/1/3/0/7/130775103/9168323.pdfIn PDF document text
    • https://rikidunojig.weebly.com/uploads/1/3/4/4/134488605/merilexaz.pdfIn PDF document text
    • https://kaxitojuwomig.weebly.com/uploads/1/3/5/3/135302818/7323013.pdfIn PDF document text
    • https://zedasadexim.weebly.com/uploads/1/3/0/7/130775923/mamilo.pdfIn PDF document text
    • https://zitavumerut.weebly.com/uploads/1/3/4/4/134465292/xekilesivu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420586/normal_6043fa811f9fe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374704/normal_60ba7370739e3.pdfIn PDF document text
    • https://gozopurejogutix.weebly.com/uploads/1/3/4/5/134578339/fdda38.pdfIn PDF document text
    • https://fibusoza.weebly.com/uploads/1/3/0/7/130775704/jijos.pdfIn PDF document text
    • https://liropesab.weebly.com/uploads/1/3/1/4/131454219/gopusubatowexifav.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450043/normal_60450e8e77f63.pdfIn PDF document text
    • https://gozaxuvo.weebly.com/uploads/1/3/4/6/134612917/1836821.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471455/normal_60b88067a0028.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373768/normal_606e9634eaed7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485695/normal_60b89b1e1642d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370740/normal_60bed3ba1dd5a.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_off0001171e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1171E 5492 bytes
SHA-256: 2c7a7547ebf6531378389f36877f34b0b890afaa00c2587c81aaf06615368ef6
font_01_sfnt_off000129dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129DC 11428 bytes
SHA-256: 619b3ad620054ee01c3fc1204bc19b1cdc33d6dcd76e000f8e16ac8f7ce87e9f