Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3e1c3dfef1e7747…

MALICIOUS

PDF

67.1 KB Created: 2020-11-25 02:24:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: b652361eb70c89dd9724efb817ed601b SHA-1: d05f197e9fc2a728da22e3658d28a84697d3d3de SHA-256: b3e1c3dfef1e77479bc60dbd624b99f7ad0d5a42441fa91d20943756b6198d89
156 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 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://trafftec.ru/strik?utm_term=mainstays+coffee+maker+5+cups PDF link annotation
    • https://mukoxorokote.weebly.com/uploads/1/3/4/5/134576398/261704.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383304/normal_5f8d55f8471fd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392453/normal_5f9d815c13fe4.pdfIn PDF document text
    • https://mudagetani.weebly.com/uploads/1/3/4/3/134381332/luraxudatogovi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477369/normal_5fbd8a251a201.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375886/normal_5faffe2745186.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374682/normal_5f9103541e3c3.pdfIn PDF document text
    • https://pidadilux.weebly.com/uploads/1/3/4/6/134666204/lafomu-fowesutom-dabikituduxun.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485587/normal_5fa8467830a6b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374689/normal_5f90387468361.pdfIn PDF document text
    • https://suludizivot.weebly.com/uploads/1/3/1/3/131383823/jitepur.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385038/normal_5fa73effcd2e2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/sukedil/porevezoguporepisifo.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c88e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC88E 5424 bytes
SHA-256: c6d90f219d18d2873621636b66ad147cfeb58905bad593306d042fdc34265fd7
font_01_sfnt_off0000db0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB0A 10812 bytes
SHA-256: a0a8ff457f30599b3fd83d1020a1768e899d0242adc67e558f696269fafd53f5

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