Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a972432ff096e20…

MALICIOUS

PDF

87.7 KB Created: 2021-04-03 11:08:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 8634c287ebcda734aad9035b8573ffbf SHA-1: c24ea6603ff0130cd297baa2ccdb55bfc991ad9e SHA-256: 3a972432ff096e209ae60f88d8ed7894a29ec1e922cf7fce264f252e0ee34ae6
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains a heuristic indicating it is a phishing lure, specifically mentioning an 'Image lure linking to an SEO redirector (free-download phishing)'. The embedded URL 'https://ponafet.ru/strik?utm_term=dewalt+cordless+tools+combo+kits' is the primary indicator of this phishing attempt, disguised as a deal for Dewalt tools. ClamAV also detected this as a phishing trojan.

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
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://ponafet.ru/strik?utm_term=dewalt+cordless+tools+combo+kits PDF link annotation
    • https://cdn.sqhk.co/tefupudoma/fjhiW1K/affirmed_horse_jockey.pdfIn PDF document text
    • http://weraka.online/ronebirededokozukavajexu5ay1j.pdfIn PDF document text
    • https://cdn.sqhk.co/nuroteditu/7icXgYo/playroom_ideas_for_baby_boy.pdfIn PDF document text
    • https://cdn.sqhk.co/zifeduwa/tjfCWhi/82064560176.pdfIn PDF document text
    • http://muxoman.mygamesonline.org/caperucita_roja_los_hermanos_grimm.pdfIn PDF document text
    • https://cdn.sqhk.co/masamiwe/iT5ghhP/59253594623.pdfIn PDF document text
    • http://shoop-fg.ru/bhopal_gas_tragedy1oa5o.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/c06bfe22-9f73-4bad-9791-526646adbf39/1036925596.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f8d328b4-f1a6-4bd7-8918-5c4b34687a68/32293014248.pdfIn PDF document text
    • http://zitadufafasid.onlinewebshop.net/tibuze.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a404b8bf-ee01-4e1c-8442-54b677ae7bab/how_big_is_30_cubic_meters.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/21bb4dba-7529-4c3e-b6a5-5e77a9c709a6/mesoxolebos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aac42ca1-ef4b-41d4-acc9-e1a47b25e19e/xoxozafulilovomumodam.pdfIn PDF document text
    • https://s3.amazonaws.com/jinabom/93296515910.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab444196-efc8-4ad1-8e67-30bc6732dfec/15978252381.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/835a4f4a-5fd7-4dab-9963-07055d903c66/computational_fluid_dynamics_heat_equation.pdfIn PDF document text
    • https://s3.amazonaws.com/fifuto/34143353612.pdfIn PDF document text
    • https://s3.amazonaws.com/wisuw/welarebogolizoxemafok.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/46e9b1e3-ef7e-4910-8eb6-da6840efce7f/difference_between_rt_and_rt_max.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_off00011a59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A59 5380 bytes
SHA-256: cf989ee5e9ef15cf29b132992d81854ea4ba34b21f676d99ebbf301c33c2d500
font_01_sfnt_off00012ca2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CA2 10928 bytes
SHA-256: d6b4cfee4bedb1b9d908e73bcc43b8629b712dc4ed81a4a65f23023a172ca5c2

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