Malicious PDF — malware analysis report

Static analysis result for SHA-256 96eb5155bc9886ab…

MALICIOUS

PDF

74.4 KB Created: 2021-05-16 10:02:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 5eaea23d93f625514d7b41560d27c624 SHA-1: b24d72988fe334f2fb49040dd5fd0d0dec9e50f5 SHA-256: 96eb5155bc9886ab3c15cd0ebc1342d9a58660299b66725e51cdb89358e0ac04
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 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://mezovuduw.ru/strik?utm_term=how+do+you+calculate+cash+flow+from+operations PDF link annotation
    • http://extraterrestrials.space/ms_azure_ad_connect2hz8h.pdfIn PDF document text
    • https://nukofagola.weebly.com/uploads/1/3/4/8/134883999/tirapenid.pdfIn PDF document text
    • http://rolorutebu.sportsontheweb.net/cards_against_humanity_expansion_free.pdfIn PDF document text
    • http://purubifo.medianewsonline.com/tom_clancy_jack_ryan_season_2_date.pdfIn PDF document text
    • https://zifusiwi.weebly.com/uploads/1/3/4/6/134686012/5426274.pdfIn PDF document text
    • http://reduslim-eu.site/60787424549wbmlb.pdfIn PDF document text
    • https://vovamujif.weebly.com/uploads/1/3/5/3/135318660/4199784.pdfIn PDF document text
    • https://bigudiwox.weebly.com/uploads/1/3/5/3/135304820/vemikipexevu-jurosi-gofokokipubiwek.pdfIn PDF document text
    • http://valigulepi.scienceontheweb.net/auma_actuator_wiring_diagram.pdfIn PDF document text
    • http://detonic-de.website/who_sells_prescription_safety_glasses_near_meg17ja.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gakajitaju.atwebpages.com/42887738483.pdfIn PDF document text
    • http://satovimowenijor.myartsonline.com/22006830176.pdfIn PDF document text
    • https://s3.amazonaws.com/tabobujimo/52298966209.pdfIn PDF document text
    • https://s3.amazonaws.com/fikuvine/animals_and_their_young_ones_pictures.pdfIn PDF document text
    • http://tipatanakuke.onlinewebshop.net/mediation_englisch_bung_klasse_9.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_off0000e5b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5B9 5552 bytes
SHA-256: 0bf462e1e20f935ebd7c1d1b47af76a2e066a14e624add14b648d3ad5b6bd0f0
font_01_sfnt_off0000f882.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF882 10608 bytes
SHA-256: 89fd2dd4ee1f84a585a2ccee7191b32026a82fe91e686802689f5529f740617e