Malicious PDF — malware analysis report

Static analysis result for SHA-256 bfd308720e78eb5c…

MALICIOUS

PDF

75.6 KB Created: 2021-03-29 18:07:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 69c125c515fce6b223836800dda23568 SHA-1: 73d05fb7e15b962086ec9228c06629ed0209e68f SHA-256: bfd308720e78eb5c95fb412e0a14a66ad2032c76d3127c268197e6c71cb452d1
186 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many of which point to disposable domains or are used in a link farm configuration. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or to serve as a dropper for further malicious content. While no scripts were explicitly extracted, the PDF structure and numerous external URIs suggest it's designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://mezovuduw.ru/123?utm_term=calendario+mundial+rusia+2018+argentina+pdf PDF link annotation
    • http://vazagitomis.mypressonline.com/america_history_of_our_nation_teacher_edition.pdfIn PDF document text
    • https://tulapubilogu.weebly.com/uploads/1/3/4/8/134881906/a2c6222219f.pdfIn PDF document text
    • http://strongcreditscore.info/john_deere_z225_belt_routingbe97v.pdfIn PDF document text
    • https://ziwolowuwuxux.weebly.com/uploads/1/3/5/3/135321756/fexidojawisojuzenag.pdfIn PDF document text
    • http://sunshop.pro/95846863821ns548.pdfIn PDF document text
    • http://umdtheatre.ru/richard_the_second_shakespeare_quotes3f0of.pdfIn PDF document text
    • http://lakcherie.ru/how_to_change_oil_in_john_deere_hydrostatic_transmissionto8n2.pdfIn PDF document text
    • http://zuluguvo.iblogger.org/nc_dmv_drivers_license_name_change.pdfIn PDF document text
    • https://siwuluwavati.weebly.com/uploads/1/3/4/7/134756127/raxefujojadiwojo.pdfIn PDF document text
    • http://fasadi.site/59856005343esy3u.pdfIn PDF document text
    • https://vukuwapebu.weebly.com/uploads/1/3/5/3/135310377/c8eb5bd4931f.pdfIn PDF document text
    • http://whysmall.space/google_sheets_annual_budget16gpg.pdfIn PDF document text
    • http://baxusajatos.sportsontheweb.net/business_proposal_sample_for_food.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://459ec6dd-5b69-4322-a182-74abbfaa0e48.filesusr.com/ugd/221eaa_019d24bb230645e0964ed94296a87fdf.pdf?index=trueIn PDF document text
    • http://famomijis.onlinewebshop.net/90043129286.pdfIn PDF document text
    • http://pomadepoxe.epizy.com/amma_tamil_songs_audio_free.pdfIn PDF document text
    • https://de99c131-68bf-4271-bcef-cda292486844.filesusr.com/ugd/f5892c_054611627ace4db39381c825aa6d7172.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e25d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE25D 5788 bytes
SHA-256: 93e3373f8661faeb803c5c31421185945204c0534acffc9663cbe9cc3d9613cd
font_01_sfnt_off0000f5f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5F7 13716 bytes
SHA-256: d2f83fe60b0a96cff8dddd6db8de38fb2baea821af71e4efd39ded338af12fe5

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