Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e3d5153244fcdf0…

MALICIOUS

PDF

80.4 KB Created: 2021-03-29 20:26:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 418526b87fdbf2bf00529fbf04c98808 SHA-1: 0835edfd965ed4519e4b3ffd986a67ca4e73d813 SHA-256: 8e3d5153244fcdf0bba0c057d042fbceacd53afd1a4c96c2d5992b830f84a87c
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating it is a phishing or trojan distribution attempt. It contains numerous embedded URLs, many of which point to disposable domains, suggesting a link farm or phishing infrastructure. The presence of external URIs and the ML_NYX_PDF_MALICIOUS heuristic strongly suggest the intent is to redirect users to malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/award?keyword=customer+behaviour+definition+pdf PDF link annotation
    • http://pojapusevipuzu.mypressonline.com/fundamental_concepts_of_accounting.pdfIn PDF document text
    • https://cdn.sqhk.co/tegatiwuwax/ge8lkje/14566181286.pdfIn PDF document text
    • http://lozutapezu.iblogger.org/catecismo_da_igreja_catlica_baixar.pdfIn PDF document text
    • https://cdn.sqhk.co/pigevikuwi/jAgheif/wano_arc_episode_list.pdfIn PDF document text
    • http://jatudoz.getenjoyment.net/pogipi.pdfIn PDF document text
    • https://cdn.sqhk.co/sosexazefip/fIwghr2/vipavomitifepejiz.pdfIn PDF document text
    • http://fosonelotila.medianewsonline.com/rumilonexojenuvajanada.pdfIn PDF document text
    • http://kifevoliga.iblogger.org/98918847321.pdfIn PDF document text
    • https://cdn.sqhk.co/pinofizulag/hjbF5gc/xatinewinopamiterelesima.pdfIn PDF document text
    • https://cdn.sqhk.co/ramawuvade/WNjc0HG/beard_oil_or_balm_at_night.pdfIn PDF document text
    • http://lilubaxubaxulu.sportsontheweb.net/tintin_comics_online_free.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gorosojipi.rf.gd/where_is_addison_rae_parents_from.pdfIn PDF document text
    • http://xowilewegiwo.myartsonline.com/viseferiwamidulopesip.pdfIn PDF document text
    • https://s3.amazonaws.com/buwosevax/nasapejuduru.pdfIn PDF document text
    • http://disozisujenat.epizy.com/79736479114.pdfIn PDF document text
    • http://gokosipok.rf.gd/fabokotisenowawubunajupug.pdfIn PDF document text
    • https://s3.amazonaws.com/ragejufa/nenolejavugetokenuwuzadul.pdfIn PDF document text
    • http://roxegut.rf.gd/32296078326.pdfIn PDF document text
    • http://foliminuga.epizy.com/53151557769.pdfIn PDF document text
    • http://welididoseburiv.epizy.com/mudumiladiwaperakadibu.pdfIn PDF document text
    • http://fefadipif.rf.gd/financial_planner_excel_spreadsheet.pdfIn PDF document text
    • https://s3.amazonaws.com/dowadotiju/mofariladewuvogemovux.pdfIn PDF document text
    • https://s3.amazonaws.com/lolijexejomak/75450045844.pdfIn PDF document text
    • https://s3.amazonaws.com/sutawowirosuvuv/97776979749.pdfIn PDF document text
    • http://losikamadan.epizy.com/free_printable_community_helpers_worksheets_for_preschool.pdfIn PDF document text
    • http://xapipukijosugil.rf.gd/farmacos_calcioantagonistas.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_off0000fae6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAE6 5352 bytes
SHA-256: ec951581807a4ae6462f3b71844c82485bf24991983943e5f1e85dd3021116b7
font_01_sfnt_off00010ced.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CED 11616 bytes
SHA-256: 198fb32f4d0048717290d7fef8050569263a49f2504c90d5f61e87994d2b81c2

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