Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3898abcc55f24e9…

MALICIOUS

PDF

76.5 KB Created: 2021-03-07 17:41:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 157c52d255abd0807b3546233d080717 SHA-1: 7607ae565049f4a539ed096a8d4b56488e8ce86d SHA-256: f3898abcc55f24e9d36751e52e24190e2ac9fba345dc5d7a64c7f462f7b01e99
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, as malicious and phishing-related. It contains numerous external links, with one prominent URL pointing to 'resalured.ru', suggesting a phishing or malware distribution attempt. The document body, though partially corrupted, indicates a lure related to product usage, aligning with common social engineering tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://resalured.ru/wix?keyword=how+to+use+titan+gel+effectively PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4411694/normal_600f9a199e471.pdfIn PDF document text
    • http://eurofamily.pro/luzisogiyu0vx.pdfIn PDF document text
    • http://kukushpa.fun/509036895672z0sa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449402/normal_6032193928447.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4491686/normal_5ffeaaf5e3cd0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385217/normal_60381fe02ccce.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://d3df31c7-72fe-42b1-a92e-0723e8ed7a16.filesusr.com/ugd/5bf82b_baff95205c0f4388b1df418e9fd7875d.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/d77b27c6-3859-4c13-8ec7-ae677c2bbeb3/sidewaturafolenuwupisaxek.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d2f6c664-0755-4bb7-b6f9-b45f67c7ca1c/sagikimanawozilukugali.pdfIn PDF document text
    • https://s3.amazonaws.com/zubata/difference_between_butte_and_mesa_landform.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2c082ce5-db0a-4869-9381-b21dc118153b/93889170266.pdfIn PDF document text
    • https://s3.amazonaws.com/wulagisi/27748295490.pdfIn PDF document text
    • https://s3.amazonaws.com/gedexim/wipuzufanewasizezinixu.pdfIn PDF document text
    • https://f1801c53-b3f5-4b94-a9b3-4bb8eb376a66.filesusr.com/ugd/af633f_9b3625ad6c054df0b0e448138606316b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dozore/basic_linux_commands_for_beginners.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f8ad38b-921b-43ff-81b6-6f63d2d5df71/kenmore_coffee_maker.pdfIn PDF document text
    • https://s3.amazonaws.com/sesafefanulokam/functional_groups_in_organic_chemistry.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a0b99632-8260-45f2-a0be-b3669e60c06c/traeger_owners_be_like.pdfIn PDF document text
    • https://s3.amazonaws.com/genedesowul/47517098289.pdfIn PDF document text
    • https://s3.amazonaws.com/taturi/block_style_business_letter_format.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_off0000edfb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDFB 5168 bytes
SHA-256: 0f98c22e5117f3d39d451338ebd37f435f7079c5cfa3b9349c1262db8f0130d3
font_01_sfnt_off0000ffcf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFCF 10756 bytes
SHA-256: f08718c764c1e44c5daea55f74868dd91dfa27e5b393e15e6408e6d11eb1b06c

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