Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ea1a80f392be22b…

MALICIOUS

PDF

69.0 KB Created: 2021-06-10 01:34:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: a7720e5116921235022b5111716fdb54 SHA-1: 2ac6ef08a918b258994f3f9d459d29481b82dfc1 SHA-256: 6ea1a80f392be22bc8bf18b3562b2544f374ce93318f232b3314c781d5f688dd
186 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, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to potentially harmful content. The document body, though heavily obfuscated, contains references to 'technical analysis' and application metadata, which could be used as a lure. No scripts were extracted, but the PDF structure itself facilitates the embedding of external links.

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://pixomot.ru/pbw?utm_term=ca+rachana+ranade+technical+analysis PDF link annotation
    • https://diwetisaxuj.weebly.com/uploads/1/3/4/8/134875536/8104219.pdfIn PDF document text
    • https://padabomax.weebly.com/uploads/1/3/4/6/134681696/girusawilit_jovamofur_fabugod_lijijewate.pdfIn PDF document text
    • https://foseludi.weebly.com/uploads/1/3/4/5/134592848/81d36c42f5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480884/normal_6038774ed26e1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373016/normal_5fd3cb3bba3af.pdfIn PDF document text
    • https://basosogufu.weebly.com/uploads/1/3/4/6/134682995/wafuleguraluxunow.pdfIn PDF document text
    • https://jebilazi.weebly.com/uploads/1/3/1/8/131856389/6375965.pdfIn PDF document text
    • https://jotabaputeja.weebly.com/uploads/1/3/5/3/135350690/1266131.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485157/normal_60c07e3c535e8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4529095/normal_606445a728770.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482023/normal_5fc6c72c8f950.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467032/normal_601cf046820b0.pdfIn PDF document text
    • https://lulodepi.weebly.com/uploads/1/3/0/7/130776712/kupiponusuter.pdfIn PDF document text
    • https://gunimumatepatu.weebly.com/uploads/1/3/5/3/135313318/gepezegonatur.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413735/normal_6023e03bd5229.pdfIn PDF document text
    • https://dixelopenam.weebly.com/uploads/1/3/4/5/134590152/5177622.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/e5d4145c-75ef-41db-972e-f1690ca4f4c6/kagiwagup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd48fc32-a0e9-4ab5-b42d-082c0db66781/how_to_print_checks_from_quickbooks_online.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/66484b23-7077-4eec-b481-5f232d3dd9ea/estudios_bblicos_para_nios_gratis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1247f38a-7659-4221-b2a2-c859bb8774b5/sunbeam_bread_maker_5833.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_off0000cf97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF97 5032 bytes
SHA-256: 45711a170edab6b0be5b4543b653751073ad1bb684cff344f32b2c34163d75f5
font_01_sfnt_off0000e0ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0AC 10680 bytes
SHA-256: 82ce8b13c65165e5a8ad3e543414e4837e3a52cbf5f116df357caf4df8daa79d