Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1092b69d2ba92c0…

MALICIOUS

PDF

135.2 KB Created: 2021-05-15 15:48:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 794fd18fc0e6b1823109c51e8e30bb91 SHA-1: ee5db9fab10afae76c3c6bdb32ec910a15d55305 SHA-256: f1092b69d2ba92c0e0dcb11a7b7855e6832103e015c1e84b87c3b3e1cf440d6b
126 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing or malware distribution lure. It contains a large number of embedded URLs, many pointing to disposable or suspicious domains, suggesting an attempt to redirect users to malicious content. The PDF structure and the presence of numerous links, including one with a 'utm_term' parameter, indicate a deliberate effort to obscure the final destination and potentially track user interactions.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://leonvi.ru/strik?utm_term=derecho+romano+marta+morineau+iduarte+y+rom%25C3%25A1n+iglesias+gonz%25C3%25A1lez+pdf
    • http://tonerinkstore.com/can_u_put_itunes_on_android_phoneh5qhu.pdf
    • https://cdn.sqhk.co/dodanadofu/EghijeW/1218309566.pdf
    • http://effektzhizni.ru/39498144264i5ef3.pdf
    • http://newyearshop.site/sunbeam_bread_maker_recipesmvjt5.pdf
    • http://bilet-pdd.site/81274705921613zv.pdf
    • http://blankid.ru/224389414200juk8.pdf
    • https://cdn.sqhk.co/vobevufubito/fjgjfWG/kegujawot.pdf
    • https://cdn.sqhk.co/xepiriza/NieviiT/apa_6_style_referencing_guide.pdf
    • https://cdn.sqhk.co/durotula/ijckjeD/37257568829.pdf
    • http://masajsalonunuz.com/invent_your_own_computer_games_with_python_2nd_editionvh78r.pdf
    • http://verifybadgesbusiness.com/57823253049xz948.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/74ac376a-6e5a-4d9b-9bc6-e82d5a89b7ac/48226810610.pdf
    • http://xafaxeko.epizy.com/fokifemebolutevi.pdf
    • http://papukut.rf.gd/5.9_cummins_mpg_towing.pdf
    • https://uploads.strikinglycdn.com/files/95b52b1e-ee1c-47df-aa43-72eee18dfb62/tinejuvazuluzewanabukexin.pdf
    • https://37bdae34-bb2f-403f-997c-54a7c09d9c06.filesusr.com/ugd/dc98cc_94274cbb89dd4db39be96bbc6a4b13ee.pdf?index=true
    • https://2b08c346-38d8-4763-b559-bb9d4fff2313.filesusr.com/ugd/40c9d6_5a52fbe19fca44fa9dd337ae19de692d.pdf?index=true
    • https://6d706a39-1f93-4f1a-9423-caccf7e65e71.filesusr.com/ugd/69f91f_1147585bad364707a96b022f34a92fd7.pdf?index=true
    • https://uploads.strikinglycdn.com/files/7c1b01ff-13b3-4af8-9a94-213c93cb58e8/81561322245.pdf
    • https://2ddedb0e-b7b0-41c9-a8bc-c018bd0e6e4c.filesusr.com/ugd/70094d_d932ee2e9eaf4f859316381996f379b1.pdf?index=true
    • http://xuvotawelotito.epizy.com/72130896307.pdf
    • https://uploads.strikinglycdn.com/files/e6e1cc57-071d-4d02-9e07-0648d96d8647/59139785423.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001d194.bin
bc2fd8ae12250efc933ccc05e8fba6f16a4e6a97507aabf793ca8bcc5cef0bbc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1D194 5956 bytes
font_01_sfnt_off0001e53e.bin
92eea456f114bd335d3e2718dc6318991151d10855bec93542e39b66f32f7dad		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1E53E 12052 bytes

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