Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6bce663155f0815…

MALICIOUS

PDF

83.6 KB Created: 2021-04-03 10:04:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 68e3894912ae913b251249a056ce8854 SHA-1: 69c604c36923d2d30dc856ceb6232b5cb3dc3965 SHA-256: e6bce663155f0815d5fc52278de43c3fd224f227cca34a3d760ac567cfa971b1
126 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with one prominent URL (`https://dugedepap.ru/strik?utm_term=petty+cash+balance+confirmation+letter+sample`) being flagged as suspicious. The heuristic `PDF_SEO_DISPOSABLE_LINK_FARM` indicates a pattern of using disposable hosting for link farms, suggesting a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://dugedepap.ru/strik?utm_term=petty+cash+balance+confirmation+letter+sample PDF link annotation
    • http://jukavoluv.iblogger.org/xotusedupowamodugu.pdfIn PDF document text
    • https://cdn.sqhk.co/moserusoba/hdoggje/best_movie_quiz_questions_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/pixazizaze/cthgJEO/refracting_telescope_information.pdfIn PDF document text
    • https://cdn.sqhk.co/radofufalam/DTkF8ib/final_fantasy_crystal_chronicles_remastered_physical_copy_english.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/rewepalazamiso/what_is_the_default_ip_address_for_netgear_switch.pdfIn PDF document text
    • http://tomosuromiv.epizy.com/xafufivotujavoseko.pdfIn PDF document text
    • http://fopiperole.epizy.com/pump_affinity_laws.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9b2baa02-f0a2-42eb-a6da-ffcfc4632e10/wajenatowivopemino.pdfIn PDF document text
    • https://30621b86-6952-4b41-80af-4d24d830bc7c.filesusr.com/ugd/122077_90334ff71f3a4499b267b46ac5986c91.pdf?index=trueIn PDF document text
    • https://d5aacb37-8766-4234-9cc8-c2ec3b911aba.filesusr.com/ugd/1e723b_5c0394ca8c05495aa2b3168c74cc8080.pdf?index=trueIn PDF document text
    • http://wagasegupoveduv.rf.gd/vibanimeviv.pdfIn PDF document text
    • http://bolunivagoxel.epizy.com/mipamifusadusuje.pdfIn PDF document text
    • http://vobuketulina.rf.gd/precalculus_with_limits_3e_online_textbook.pdfIn PDF document text
    • http://betitunusepa.epizy.com/download_font_barcode417.pdfIn PDF document text
    • http://bitugoxopezuwu.rf.gd/function_in_r.pdfIn PDF document text
    • https://24d1f61b-f5c5-4d2f-8180-62589f44e8d8.filesusr.com/ugd/eed56f_c2a1c140140440ff9488224031b1e39d.pdf?index=trueIn PDF document text
    • http://nuxumejaxumem.epizy.com/android_box_m8s.pdfIn PDF document text
    • https://s3.amazonaws.com/farowug/asus_maximus_vii_hero_nvme_support.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a244f8ac-c42b-465f-9ba3-1864d2ce7b77/79245814339.pdfIn PDF document text
    • https://s3.amazonaws.com/toliwudalamem/61278796147.pdfIn PDF document text
    • https://s3.amazonaws.com/divelatoxa/15779790325.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/12258539-bcef-4ec1-b340-b98d17a87dd3/10_ways_to_appear_smart_in_meetings_sarah_cooper.pdfIn PDF document text
    • https://4b67404f-136a-46a0-9cf3-151f2d38faab.filesusr.com/ugd/241fd5_26c043a141b944698f5ec82cccfbb0a7.pdf?index=trueIn 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_off000108ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108BA 5496 bytes
SHA-256: b321efc8da7978b844130ccf1ed041982f283dd1964e5c92258332883f6d044d
font_01_sfnt_off00011b49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B49 11024 bytes
SHA-256: ec5478bcd1f0a77ab18fc8e144fcd1621919f2a0429eedf452381c77303fb2b8

Open this report in the interactive analyzer, or submit your own file for analysis.