Malicious PDF — malware analysis report

Static analysis result for SHA-256 2eccbb6ca051af41…

MALICIOUS

PDF

77.1 KB Created: 2021-03-15 11:51:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 012dac33650c40fafe194620816fc325 SHA-1: 630d515521c10b531262fe3d71fc14b403a6df29 SHA-256: 2eccbb6ca051af4153a66ff740855a89c9974869a989d96104608e41b7796a9f
126 Risk Score

Malware Insights

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

The sample is a PDF file flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, including one pointing to 'jottigo.ru' which is likely part of a phishing or malware distribution chain. The PDF's structure and embedded links suggest it's designed to redirect users to external, potentially malicious, websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://jottigo.ru/strik?utm_term=vw+bug+transmission+oil+change PDF link annotation
    • http://gosoxegekiri.mywebcommunity.org/ramexaboragibekuluso.pdfIn PDF document text
    • https://cdn.sqhk.co/webepinovet/ENughx4/vureg.pdfIn PDF document text
    • https://cdn.sqhk.co/vasegodesazu/icftLsG/durufogoxebepabizoz.pdfIn PDF document text
    • http://birebap.scienceontheweb.net/trigonometric_identities_solver.pdfIn PDF document text
    • https://cdn.sqhk.co/molavagew/hiCjfii/tuxuvobidikonotitowawo.pdfIn PDF document text
    • https://cdn.sqhk.co/nopavoboriru/geLUibL/angular_reset_formarray.pdfIn PDF document text
    • https://cdn.sqhk.co/veludewozen/ehesrge/color_switch_solo_vera_mona.pdfIn PDF document text
    • http://xazonojader.mywebcommunity.org/78276184382.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/a9eff1b5-f515-4ef9-854c-fff460f76c38/xazemi.pdfIn PDF document text
    • https://s3.amazonaws.com/veraxawewib/vinujiwajekaka.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/23b9a039-791a-4f77-99e0-4f145f5bffa0/laars_boiler_rep_near_me.pdfIn PDF document text
    • https://s3.amazonaws.com/zuniverijesud/formal_neurological_examination.pdfIn PDF document text
    • https://s3.amazonaws.com/lixisariwulo/kinds_of_animals_worksheets_for_grade_2.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d2f00c0-370c-4dcd-8dda-bc184ea77931/how_much_is_marlin_30-30_lever_action_worth.pdfIn PDF document text
    • http://repajazofuwide.epizy.com/ielts_listening_answer_sheet_task_1.pdfIn PDF document text
    • http://romapubimowa.onlinewebshop.net/56970289394.pdfIn PDF document text
    • https://s3.amazonaws.com/wegugus/tollywood_actress_hd_photo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3c6f1934-3b02-4b11-9602-a5482af15359/tire_size_for_2016_toyota_corolla_s.pdfIn PDF document text
    • http://vawerudarasikow.myartsonline.com/xubuwarokexiwanepore.pdfIn PDF document text
    • http://loratozojakin.epizy.com/guweso.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b772b68c-97a9-48eb-ab84-3c2a2f78f983/serazilunikamuzevik.pdfIn PDF document text
    • http://pegagudebamu.epizy.com/ecg_interpretation_made_easy_apk.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_off0000f2bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2BB 5412 bytes
SHA-256: 5f209ea44587df524099f86fe7c51ed84c6e2415848306db375e0ce0041ab145
font_01_sfnt_off0001050d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1050D 9920 bytes
SHA-256: 6c37bc81684e3c1e4bfaac3869ad6159da454a4fa73f35550e3a4b797515b280

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