Malicious PDF — malware analysis report

Static analysis result for SHA-256 dbe065c7b1cdfc51…

MALICIOUS

PDF

70.1 KB Created: 2021-04-08 10:09:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: a62d45c5a8dcbeb48886732cab323b80 SHA-1: 1f61dc908037510fb8fada7a58838fb88ea33da0 SHA-256: dbe065c7b1cdfc516f7e9d4117001f68d2f3d3d521d8259cf1684f20e5b655ad
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing or trojan variant. It contains numerous embedded URIs, with at least one pointing to a suspicious domain ('crophysi.ru') that is likely part of a link farm designed to redirect users. The presence of these links suggests an attempt to direct users to malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://crophysi.ru/wix?keyword=yoko+littner+cosplay PDF link annotation
    • http://dekupedatibidal.iblogger.org/ninowojiv.pdfIn PDF document text
    • http://melofuwi.getenjoyment.net/balanopostitis_manejo.pdfIn PDF document text
    • http://lutafem.getenjoyment.net/nueva_piramide_alimenticia_2020.pdfIn PDF document text
    • http://tazanup.mypressonline.com/65515748060.pdfIn PDF document text
    • http://drive4mclanemilwaukee.com/pojupixodekitoylaei.pdfIn PDF document text
    • http://zofiziz.getenjoyment.net/internet_service_provider_isp.pdfIn PDF document text
    • http://begetus11ppz.xyz/16102672249kos14.pdfIn PDF document text
    • http://denizan.com/96736874347olctl.pdfIn PDF document text
    • http://vobigivu.22web.org/metotedafajazimeke.pdfIn PDF document text
    • http://vawagizipul.iblogger.org/julozupuvolavaxapexosux.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://9afb1793-bc57-4514-bb46-74e980466609.filesusr.com/ugd/11f207_8268f495a5c648439934d56ad42c4eec.pdf?index=trueIn PDF document text
    • https://10bc5e17-7652-4c7e-9b43-999b3eb3b021.filesusr.com/ugd/5edc69_ded0ebab4d844ddcbfab1c1976f8a631.pdf?index=trueIn PDF document text
    • http://mamepekavileput.rf.gd/50542694034.pdfIn PDF document text
    • https://s3.amazonaws.com/kovezodepugov/applied_physics_express_template.pdfIn PDF document text
    • http://sotuwekelog.epizy.com/organization_chart_template_ppt.pdfIn PDF document text
    • https://ecfc1f44-6648-4072-bff5-6ee4adcfbe4f.filesusr.com/ugd/e5a943_41c8ee3143c14397a294bed08b5d5314.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sowewazulejewi/conjunction_full_form.pdfIn PDF document text
    • http://pajogapusifured.rf.gd/jebutazuno.pdfIn PDF document text
    • https://s3.amazonaws.com/lazolu/legislative_branch_powers_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/kakekojezutok/15825231984.pdfIn PDF document text
    • https://s3.amazonaws.com/jafujasiwetid/what_are_the_3_most_powerful_greek_gods.pdfIn PDF document text
    • http://wulibazosuxib.onlinewebshop.net/29269613273.pdfIn PDF document text
    • http://fipabadidori.epizy.com/zanafanixinulojogisawoleg.pdfIn PDF document text
    • http://dupetomumipur.rf.gd/asp_net_mvc_core_autocomplete_textbox.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_off0000d204.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD204 5056 bytes
SHA-256: e1ac19f8f28c9017029322fcf051f99878a5650fcb4ca75b47f39672e4f5ab79
font_01_sfnt_off0000e350.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE350 11236 bytes
SHA-256: 35118bb11bc83690be09bd8ce72b3cfea5dd1e54d64a34c1c6207a75c6762b3e

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