Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba8e022dc395d81c…

MALICIOUS

PDF

85.1 KB Created: 2020-12-19 13:52:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: c3a00164087602c9c53ee0021880da88 SHA-1: ba5afe025c5af57907d70f2416643839aa74f8de SHA-256: ba8e022dc395d81c7d0a66a0c0bd9673b07564cf0aa1579f05b100fef30602b7
186 Risk Score

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 0.9996

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://traffine.ru/123?utm_term=super+drift+2+playhub PDF link annotation
    • https://juxipidupe.weebly.com/uploads/1/3/4/6/134694928/3028519.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366408/normal_5f873f11137fd.pdfIn PDF document text
    • https://mikezexevi.weebly.com/uploads/1/3/4/5/134528008/63bf5.pdfIn PDF document text
    • https://nosozekime.weebly.com/uploads/1/3/4/6/134634018/737699.pdfIn PDF document text
    • https://gevafitasib.weebly.com/uploads/1/3/1/3/131380901/1429013.pdfIn PDF document text
    • https://tadadali.weebly.com/uploads/1/3/4/0/134095934/tidexolapuziw_wolor.pdfIn PDF document text
    • https://dunopupusegujuz.weebly.com/uploads/1/3/4/3/134348927/badevobafeg.pdfIn PDF document text
    • https://wefapewirevuvik.weebly.com/uploads/1/3/4/6/134667644/6131326.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://s3.amazonaws.com/dutimajizowa/demisuxuxuxirezubomabodun.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab60fe18-2083-47e2-83f5-d7fa7e1216d8/glucomannan_weight_loss_success_stor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0812ba78-60d6-482d-aa29-64c379e39941/nokemifu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/24740a06-97b7-4b9d-b8cf-04c45c54832d/kexabadomupu.pdfIn PDF document text
    • https://s3.amazonaws.com/napoledunadigo/ubiquiti_unifi_ap_ac_pro_software.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbcfb6d9d104e5f152dbf8f/1606220659325/braun_coffee_maker_filter.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e07691d-2915-45e9-87b8-280ab159df1f/chamberlain_whisper_drive.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0c162085bf90c0efc5341/t/5fc1a7473f75b16643129da1/1606526792770/dupipewarugin.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ef39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF39 3548 bytes
SHA-256: 5be524feed732f8c8084fe76375e4eee7937569e070973a4bc59190679b28c06
font_01_sfnt_off0000fbe1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBE1 5092 bytes
SHA-256: bf396010e2796fa2252768e57422775774cc1146b0e42bc6b9fdcba7818266fa
font_02_sfnt_off00010d42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D42 15964 bytes
SHA-256: 0f98c5375c03d55e042113d3a402a2b27b375b3549f89c179fb3d88eff9fa4c8
font_03_sfnt_off00013938.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13938 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2