Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3e6d065a6bce08e…

MALICIOUS

PDF

77.7 KB Created: 2021-02-26 15:17:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: b311a251a9cab531ce348fd05a167d37 SHA-1: 535f1841cac509c833f87e4b40973c5b3cc6764f SHA-256: e3e6d065a6bce08ef0d737ce073441b149a428f326347176191a930c99d3ad91
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 0.9998

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://dafemum.ru/wix?keyword=novena+a+la+sangre+de+cristo+d%25C3%25ADa+3 PDF link annotation
    • https://cdn.sqhk.co/widagawinud/hbNqvja/brick_disc_cutter.pdfIn PDF document text
    • http://wonder-ita.fun/nec_2011_handbook_free_downloadhjlhg.pdfIn PDF document text
    • https://cdn.sqhk.co/konafomaz/hfhfieU/sky_force_world_war_1.pdfIn PDF document text
    • https://rarozevalir.weebly.com/uploads/1/3/1/4/131437937/watawizegebe.pdfIn PDF document text
    • https://piwomokoxik.weebly.com/uploads/1/3/5/3/135335333/fexov_galuvefom.pdfIn PDF document text
    • https://tixowofo.weebly.com/uploads/1/3/4/5/134592641/7e779565cb917c8.pdfIn PDF document text
    • https://cdn.sqhk.co/fagisuxupinu/iiYeiiN/baixar_drift_max_pro_dinheiro_infinito_2019.pdfIn PDF document text
    • https://rapowude.weebly.com/uploads/1/3/1/4/131454581/7587395.pdfIn PDF document text
    • http://kkkirrreeee.space/vacation_itinerary_samplec4i1c.pdfIn PDF document text
    • http://bagajuz.iblogger.org/69230929024.pdfIn PDF document text
    • http://inostrana.com/upci_ministers_directory_2020c2hyh.pdfIn PDF document text
    • https://tilotifibow.weebly.com/uploads/1/3/4/5/134505855/8562610.pdfIn PDF document text
    • http://ziviludemedo.iblogger.org/55362954549.pdfIn PDF document text
    • https://jawuvufos.weebly.com/uploads/1/3/4/8/134856807/7366015.pdfIn PDF document text
    • https://lulegosepo.weebly.com/uploads/1/3/0/9/130969478/fovibukupavujiliruw.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/napoledunadigo/dell_optiplex_3010_i3_graphics_card.pdfIn PDF document text
    • http://kizosala.epizy.com/27304941596.pdfIn PDF document text
    • https://s3.amazonaws.com/tujeviwakirawu/49294705743.pdfIn PDF document text
    • http://pivutabomenatam.rf.gd/guidewire_software_inc_malaysia.pdfIn PDF document text
    • https://s3.amazonaws.com/pusolefosex/43920609200.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_off0000effa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFFA 5356 bytes
SHA-256: 3a5753a020596129f091a4d96c267cd02ba829d69f60f9cf4ced16c5aa3951d6
font_01_sfnt_off0001024f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1024F 11436 bytes
SHA-256: c81ed6179506b37812e05b8c9900248488b2d69f9443974230c775f6b0e702ec

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