Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa2fc06a2e572a62…

MALICIOUS

PDF

80.3 KB Created: 2021-04-04 17:48:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 047c5d1cf9bc072b1fcb4b48863fe6ad SHA-1: efb8b2a27567c4ead1d2274251c9ff351548e6e5 SHA-256: aa2fc06a2e572a624393912dc8a0e38bd148face07537a2f3b255960f46c283c
126 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many of which point to disposable hosting or link farms, indicating a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to direct users to phishing or malware-hosting sites. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a phishing lure, likely delivered via spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://zajinet.ru/strik?utm_term=are+old+singer+sewing+machines+worth+money PDF link annotation
    • http://tokio-2020.fun/wosomop93f81.pdfIn PDF document text
    • http://yachts-4-sale.com/decal_application_instructions_svgygvcx.pdfIn PDF document text
    • http://pycnidwzxc.info/gewazibawilanu1gsog.pdfIn PDF document text
    • http://falujojul.22web.org/nojepudokudefa.pdfIn PDF document text
    • http://greatholl.com/vugimagusabidakuzx1ft.pdfIn PDF document text
    • http://silver35.ru/hempadur_85671_data_sheetqt8rt.pdfIn PDF document text
    • http://obmenkalnr.online/prayers_that_availeth_much_demonicj9h4c.pdfIn PDF document text
    • http://gelchlen.fun/53515293868danlv.pdfIn PDF document text
    • http://dakolozen.22web.org/cartoon_song_whatsapp_status.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://lorabedujeweb.epizy.com/felutupujoxavanupeboxowas.pdfIn PDF document text
    • http://bumitenebisi.epizy.com/26787649856.pdfIn PDF document text
    • http://taxisariwoboduz.epizy.com/25254349849.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9eec4277-69bf-4091-a9d7-0bc7e4a21494/dd_fifth_edition_feats.pdfIn PDF document text
    • http://zoguberuwanu.rf.gd/zirapewidewidopiseda.pdfIn PDF document text
    • http://sagalesokalu.epizy.com/7423791830.pdfIn PDF document text
    • http://toxamifobofu.epizy.com/minority_scholarship_form_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/dobesogum/pifuxevajonina.pdfIn PDF document text
    • http://jebetumupogo.rf.gd/luxerizuvaxuwamijonu.pdfIn PDF document text
    • https://s3.amazonaws.com/loranoduzuja/rofofepobafilaporawidef.pdfIn PDF document text
    • https://s3.amazonaws.com/taguxif/758571866.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/509780b0-b223-481b-99d6-8d9a9ca4a528/74761569613.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ee299a5c-e22f-4043-b3b2-42a315dcaeff/50857177971.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a99e42f8-0de0-4023-a0bd-4277adce7988/taravovatarubazatefukuj.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eebf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEBF 5324 bytes
SHA-256: 7e346ded85f224eaa1f66f12f731afa91aecaff1e1ee259f64ce8c85435db2b3
font_01_sfnt_off000100b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100B6 10892 bytes
SHA-256: 71753271ba0cc1759b1df976931f390147748b14d9d664b4d2e1221ad80a28aa
font_02_sfnt_off00012526.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12526 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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