Malicious PDF — malware analysis report

Static analysis result for SHA-256 db82c10045a03671…

MALICIOUS

PDF

64.4 KB Created: 2020-11-11 01:58:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 67082726ac9b22a4b98cbccf747a8bac SHA-1: d9eff5efcd206055cda65a4660580e3f011884d1 SHA-256: db82c10045a03671d07c3fac4a20dc2db43db98b9066935b5fe43e7f2ca54543
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://traffine.ru/strik?keyword=diodosio+motors+pueblo+co PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4369664/normal_5f98a1ef1857d.pdfIn PDF document text
    • https://xazojitov.weebly.com/uploads/1/3/1/4/131408465/8873362.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410186/normal_5f97321934fa9.pdfIn PDF document text
    • https://xifobosakup.weebly.com/uploads/1/3/2/8/132815359/mosabiwinuvor.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371543/normal_5f905afcca68c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380083/normal_5fa660fb86063.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445343/normal_5fa41c1815421.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/ce8f949c-7f30-498f-a0e2-3fba77e5ab45/75009919123.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/555fd6e2-1443-4009-88fc-da1a05d89018/kipewepuwaxi.pdfIn PDF document text
    • https://s3.amazonaws.com/naranofinovujix/body_planes_and_cavities_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/712309f5-1304-4bcc-ae6e-af8ed51186f6/52860519863.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f38fa159-6f8a-4905-8623-e14bc6bf52bb/24497403878.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1572fd6f-3ea8-49f1-98f5-617f17e83c63/bumegunikegapewegat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fc700c54-5846-4e57-bcec-de4165ef292f/lujijalesupudufuval.pdfIn PDF document text
    • https://s3.amazonaws.com/jinabom/my_pet_protector_3_hacked.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b2fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB2FC 4924 bytes
SHA-256: a12ecf09e18aa742af0eab6bf310ac930adeb20e17ee6dec05e7d1aaa8ee46f1
font_01_sfnt_off0000c3c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC3C3 10252 bytes
SHA-256: 7514e07c92ad660fb5bf869f7a272070e69c93f5789c2a15bcd30a41c51098c8
font_02_sfnt_off0000e685.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE685 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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