Malicious PDF — malware analysis report

Static analysis result for SHA-256 e13147b8f19e14cc…

MALICIOUS

PDF

70.6 KB Created: 2021-05-27 21:22:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 3338099d8380a6c159bc979e27389ac9 SHA-1: dfb42b22dbb6c9d0f4d5974c886de5455abd2f33 SHA-256: e13147b8f19e14cc56086c92a1d8cabfa34bbb28c96096f99e4bf9677c1dd2ba
186 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 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://jumiwimov.ru/123?utm_term=sheet+metal+almirah PDF link annotation
    • https://sapatipiragibo.weebly.com/uploads/1/3/4/7/134708637/bekekeba_jijuwokaferita_linivuturap.pdfIn PDF document text
    • https://wadasazaba.weebly.com/uploads/1/3/3/9/133999184/1335441.pdfIn PDF document text
    • https://megimopitujoni.weebly.com/uploads/1/3/4/6/134681749/9664609.pdfIn PDF document text
    • https://zuxusesomopekem.weebly.com/uploads/1/3/5/3/135305840/zaforugor.pdfIn PDF document text
    • https://jigulukeduza.weebly.com/uploads/1/3/4/5/134508725/wepisi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402250/normal_5fefbee44e7b6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392656/normal_60234df8644a9.pdfIn PDF document text
    • https://gesogakit.weebly.com/uploads/1/3/4/5/134581759/7f7610efb52f.pdfIn PDF document text
    • https://ludubilataso.weebly.com/uploads/1/3/4/7/134719947/5358651.pdfIn PDF document text
    • https://rovividupezudu.weebly.com/uploads/1/3/4/3/134373795/zunaputivawul.pdfIn PDF document text
    • https://xopezafetuwov.weebly.com/uploads/1/3/5/3/135314897/382381.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476566/normal_605d7b4dec0a9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/a9e0a36d-bc5f-4a51-a7b2-ead3061162ef/best_armour_set_witcher_3_blood_and_wine.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6cca27f3-aa9b-4c6a-9fcd-f2af8f77f8da/jipiwuxexojamowerekeji.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9280816d-4568-42d8-9491-edda648233c3/america_the_essential_learning_edition_combined_volume.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/96fe0732-283a-475c-bd4b-40038c4a7c02/how_to_fix_a_squeaky_maytag_atlantis_dryer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d22469c-b115-4f52-9cd2-fc8c5ff6b7ab/xinuvidikapibumilizebol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1076fe3b-994b-4449-9384-ab547b4aa9c9/22986673920.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/11bab66c-872f-4247-9539-8cc92672d3a4/fun_run_boosterthon_rewards.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_off0000dbd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBD7 4848 bytes
SHA-256: 5423163553598b04f643a5b79874597cb9cbaac649ee3176977036891d9ed518
font_01_sfnt_off0000ec21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC21 9804 bytes
SHA-256: cfa1335d301b0078db70d0fa63f20077d6c59103b9d9cc6d3beb32646bdc4ad9

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