Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f9866339395fe83…

MALICIOUS

PDF

78.4 KB Created: 2021-04-25 05:16:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 3e07fe3cd62a2e8dc834e56448ef858b SHA-1: 6e57cd3f6a46aadc7de93b119eb2df15eb341761 SHA-256: 8f9866339395fe8346c3ce174b92039996f16093711ad2362f089ad90507f1b6
156 Risk Score

Malware Insights

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

This PDF file contains numerous external links, characteristic of a link farm or phishing lure, directing users to malicious domains. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as a phishing trojan. The presence of embedded URLs and the overall structure suggest an attempt to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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 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.
  • 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://kuzutuzo.ru/strik?utm_term=burger+king+value+fries+nutrition+facts PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4465949/normal_602e6a3d59517.pdfIn PDF document text
    • https://ribebolavat.weebly.com/uploads/1/3/1/3/131398139/38d658f3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465400/normal_600f2244602b6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383446/normal_5ff653be7c2eb.pdfIn PDF document text
    • https://lutaxebibutemun.weebly.com/uploads/1/3/1/3/131380730/gevodopu.pdfIn PDF document text
    • https://wutodifutatur.weebly.com/uploads/1/3/2/8/132814097/fatuvivulaxit_dobezibi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365626/normal_6043be386503f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454559/normal_602a4fe800e4b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387054/normal_60445eb29b02b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469355/normal_6024571eb99a9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373301/normal_606cd9a08b1a8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458145/normal_5fe7e61f78cfb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4428054/normal_603f969e1f77e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383334/normal_60515b0838b13.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4474446/normal_5fc7704207075.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446152/normal_5fd0aa8c19589.pdfIn PDF document text
    • https://lafupoboj.weebly.com/uploads/1/3/1/8/131857117/8952632.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489237/normal_601e4bcead45a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421468/normal_60062d0108bf0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481831/normal_604ccb3180309.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405641/normal_6062fa56b9c03.pdfIn PDF document text
    • https://duzajitoji.weebly.com/uploads/1/3/2/6/132680922/bebafot-golotalegip.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369509/normal_604d295a0ea8a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375207/normal_603497c5c6682.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401971/normal_603e1ca79ab47.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_off0000f352.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF352 5220 bytes
SHA-256: 8373e3db7b0b33b4ed5a51a2e8b93cc808b9021f4e0e1c1b78f65dd7afa85f4d
font_01_sfnt_off0001053b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1053B 11296 bytes
SHA-256: e34b1eaf9f7ecf7ebf850593161bcf0dd4425e75b0a202af5ae739713b07a2f4

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