Malicious PDF — malware analysis report

Static analysis result for SHA-256 109eb0d4df8beb2d…

MALICIOUS

PDF

81.0 KB Created: 2021-03-05 03:24:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 5a07824f2b8710768ef300057768d175 SHA-1: 7d634c9bc9e06e60ad721fa7a85b79990dbdb59a SHA-256: 109eb0d4df8beb2dc7915be719c1e2278de41a4cf6d16829fcbf15dbaaa8182d
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with a high concentration of links on disposable hosting, indicating a link farm designed to obscure malicious destinations. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious document lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://gimoguvi.ru/strik?utm_term=el+lazarillo+de+tormes+pelicula+completa+2001 PDF link annotation
    • https://cdn.sqhk.co/vabalogu/fDvXWjb/duweruwofaju.pdfIn PDF document text
    • https://cdn.sqhk.co/fabozesemi/pjdNgdZ/95082993676.pdfIn PDF document text
    • https://cdn.sqhk.co/wabasenenem/bxKASuf/diy_ideas_for_teens.pdfIn PDF document text
    • https://cdn.sqhk.co/depadukat/eEY94ha/dizotafakomul.pdfIn PDF document text
    • https://cdn.sqhk.co/tabuguran/dja2jgi/post_it_index_flags_amazon.pdfIn PDF document text
    • https://cdn.sqhk.co/wusezofetib/aggKcjb/waukee_ice_cream_shoppe_menu.pdfIn PDF document text
    • https://cdn.sqhk.co/mutexeze/jbYjegi/rorivabisikal.pdfIn PDF document text
    • http://jitaguzo.22web.org/manuale_aspen_hysys.pdfIn PDF document text
    • http://nutesane.iblogger.org/whirlpool_ultimate_care_ii_washer_not_starting.pdfIn PDF document text
    • https://cdn.sqhk.co/nogawevorus/iFhMEdJ/hunting_simulator_game_the_hunter_simulator_mod_apk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://telenusu.epizy.com/mutonodipapumi.pdfIn PDF document text
    • https://s3.amazonaws.com/liluvad/77167197970.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c8d3809-653f-4659-b7f2-941263518b32/38419277452.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/712a8b29-d5bf-4096-bddd-5a8e5ef62b6a/82971332907.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e7c9910d-b853-428d-85ec-e2b9d8a8e304/zifuj.pdfIn PDF document text
    • https://s3.amazonaws.com/jivagajamav/kirerogokadexewarubonedov.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d4b116d2-b7f0-44b1-b997-784902b4c0f2/bose_acoustimass_15_manual.pdfIn PDF document text
    • http://piwiweranewu.rf.gd/how_much_does_pinhole_gum_surgery_cost.pdfIn PDF document text
    • http://fekamenuzexogam.epizy.com/extent_report_4._0._9_jar.pdfIn PDF document text
    • http://fuzadakeju.epizy.com/mixiterakiwagezalabato.pdfIn PDF document text
    • http://gizugutopaf.epizy.com/14011319733.pdfIn PDF document text
    • https://s3.amazonaws.com/megulu/beoutq_apk_live.pdfIn PDF document text
    • http://gumelojapa.epizy.com/getivep.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_off0000fa7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA7A 5552 bytes
SHA-256: 60b53ab01558cdf79731bfd28404394eb6c9114baa574caccc29347a1f3f7b09
font_01_sfnt_off00010d56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D56 12136 bytes
SHA-256: 84dd63e6110905392e608b5aff50d04435f2f5a0c40c18e21148ba1cf1b34c11

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