Malicious PDF — malware analysis report

Static analysis result for SHA-256 b53fc5e835586fad…

MALICIOUS

PDF

69.0 KB Created: 2020-11-22 02:54:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 5477ba69f2dc10e323b93dfa5f9beb9e SHA-1: bbd5ba6a3c60121149e3632f3294afe1544b1b2a SHA-256: b53fc5e835586fade1ce730dd278fca86dd23906ea58124abee824129b0de16d
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous external links, with one pointing to a suspicious domain ('trafffe.ru'), suggesting a phishing or malware distribution attempt. The document body, though partially corrupted, indicates a lure related to 'recycled wood crafts'. The presence of embedded URLs and the PDF structure strongly suggest it's designed to redirect users to malicious 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 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://trafffe.ru/aws?utm_term=manualidades+con+cajones+de+madera+reciclada PDF link annotation
    • https://mebenemezozu.weebly.com/uploads/1/3/4/6/134689881/4152631.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393186/normal_5f8f5b59b305c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481834/normal_5fb99320cec26.pdfIn PDF document text
    • https://vujuzujotug.weebly.com/uploads/1/3/4/4/134478410/9f6845bf8ae.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451752/normal_5fb2a5b17c202.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416923/normal_5fb7bbc61d97d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373297/normal_5f93ddf65afb5.pdfIn PDF document text
    • https://dunujamovexen.weebly.com/uploads/1/3/4/3/134361976/xosozixebagopu_walogirujunigew_nadudajoxakima_piwuzit.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452588/normal_5fb5cec161b2b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366639/normal_5fb741315ac8d.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/nalifij/cambridge_dictionary_advanced_learners_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/88c389ca-cef0-4a27-9293-77c421d50f09/download_vampire_diaries_season_1_sub_indo.pdfIn PDF document text
    • https://s3.amazonaws.com/xuzed/bigegakujan.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_off0000d0f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0F5 5168 bytes
SHA-256: 2b044d658c5942126792debbd1f1b0e2de045f5bfcfe612692b15fec515e61bc
font_01_sfnt_off0000e27c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE27C 10708 bytes
SHA-256: 9212270f1d18d09234a4e8f0645d1471bf17932270024c040a1f2d182305c4bc

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