Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e5c3c2fc0b20c0c…

MALICIOUS

PDF

71.7 KB Created: 2021-03-02 15:42:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 285511a1855e0f13f0c424475798c6e1 SHA-1: d39790a1b5319982905f98c72976bca21fcec44d SHA-256: 1e5c3c2fc0b20c0c135ff43b9ac8bcbcc267317134f3766ab02fbbb3a3fd015f
244 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://dafemum.ru/award?keyword=cottage+food+law+california+cakes In PDF document text
    • http://dumubemajizukov.medianewsonline.com/gabogowuli.pdfIn PDF document text
    • https://cdn.sqhk.co/sofilita/hjejbjh/9773234301.pdfIn PDF document text
    • https://cdn.sqhk.co/gidulikegel/ihijpgh/simple_task_list.pdfIn PDF document text
    • https://bazodezivif.weebly.com/uploads/1/3/6/0/136088162/jebimoburatokor-vuzibidu-welesakefitoda-zidumem.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365612/normal_5ff44c892aa9d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376105/normal_6010fd21cf122.pdfIn PDF document text
    • http://nosilekexiwot.mywebcommunity.org/bisarojobinimoko.pdfIn PDF document text
    • https://cdn.sqhk.co/fivufotimad/iKhdihz/taduduwigubegobujukulo.pdfIn PDF document text
    • http://mubalupuzapo.22web.org/circle_theorems_worksheet_doc.pdfIn PDF document text
    • https://vakitepodedobi.weebly.com/uploads/1/3/5/9/135963574/7609147.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425910/normal_5fd229e91d953.pdfIn PDF document text
    • https://noselokegikol.weebly.com/uploads/1/3/4/3/134347285/7879691.pdfIn PDF document text
    • http://wokizunapajunez.iblogger.org/bluetooth_soleil_software_latest_version.pdfIn PDF document text
    • https://cdn.sqhk.co/zowonefaso/vhgYWgh/starfall_i_am_proud_to_be_me.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dokudaruriwiv.atwebpages.com/4_past_midnight_bandcamp.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_off0000dbf7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBF7 5248 bytes
SHA-256: ef42d6952af03578171d508e18a9de6cd64882faac6425e4f5dadb8735dc8f61
font_01_sfnt_off0000edf6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDF6 10644 bytes
SHA-256: 1338291fa5e1eaa40cf5486594173c0d35ea036b08be7bd5df4cef4129c772b5

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