Malicious PDF — malware analysis report

Static analysis result for SHA-256 daa029a2d8f757c1…

MALICIOUS

PDF

73.7 KB Created: 2021-02-27 21:49:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: 679487b41f4daf34dafca9146f9a5ab8 SHA-1: de13364d2744f68acbecec36dd1c2c7b2dcec687 SHA-256: daa029a2d8f757c157e81bd96944fdbdfbdfe8810f63a9f9ea85699d99c0cdfe
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains multiple heuristics indicating malicious intent, including ML classification and ClamAV detection as a phishing trojan. It embeds numerous URLs, many of which point to disposable domains and are likely used for distributing further payloads or conducting phishing operations. The document body, though partially corrupted, suggests a lure related to a 'house checklist', which is a common tactic for social engineering.

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://fokemale.ru/strik?utm_term=how+to+clean+a+house+checklist PDF link annotation
    • http://pasendapp.online/94una.pdfIn PDF document text
    • http://nanonewe.scienceontheweb.net/22336073163.pdfIn PDF document text
    • http://voyazh-shina.com/reddy_heater_propane_30_000_btum8xt8.pdfIn PDF document text
    • http://muzibatixabu.mypressonline.com/what_are_good_books_for_14_year_olds.pdfIn PDF document text
    • http://anbieterbewertung-autoscoutch.com/596068650448kx0q.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379032/normal_600a8f3b03fbe.pdfIn PDF document text
    • http://sipipewawezizuf.getenjoyment.net/wakuv.pdfIn PDF document text
    • http://dressnbuy.com/bad_blood_book_club_questionsmr4j7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zorijefugixor.atwebpages.com/rode_videomic_pro_battery_change.pdfIn PDF document text
    • https://s3.amazonaws.com/sesafefanulokam/balloon_coloring_page.pdfIn PDF document text
    • https://s3.amazonaws.com/vipinib/buderus_boiler_user_manual.pdfIn PDF document text
    • http://popofisofol.myartsonline.com/how_to_find_the_interior_angle_measure_of_a_regular_polygon.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_off0000dfd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFD3 4908 bytes
SHA-256: 8fcceef97fdcc11a576f0a6b8a4f0ff0b4874effcdcccb09dcf493baf4f522ee
font_01_sfnt_off0000f093.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF093 12620 bytes
SHA-256: ecc5be0edbaf07d0b1979d432d8d80f7004b7373101cc2a1711eda20459e396f

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