Malicious PDF — malware analysis report

Static analysis result for SHA-256 e55e8970692db505…

MALICIOUS

PDF

63.0 KB Created: 2020-11-24 21:21:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 57f26f5dbebe92e64e78c722019a52ac SHA-1: dfd657d3d8b63c6861f774171bc7fdff86cd80be SHA-256: e55e8970692db505d3e93ad93fa353c8bc010e555496f64308373e1cb2923797
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://traffmen.ru/strik?utm_term=knife+switch+for+car+battery In PDF document text
    • https://cdn-cms.f-static.net/uploads/4486200/normal_5fb5671727a19.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367302/normal_5f8c163653d3b.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/8df51411-c52c-4bd8-9b08-63c157827e3e/841023259.pdfIn PDF document text
    • https://s3.amazonaws.com/fowonaxul/the_roxy_theater_lebanon_showtimes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/31552ba7-d426-48cc-978f-d09a3335a144/38505777775.pdfIn PDF document text
    • https://s3.amazonaws.com/zumomasugipeno/f2p_crafting_guide_osrs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b24f86b-8a36-43a4-8989-df5b122e218e/67927045438.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e8ceaacf-effe-49c7-89a6-c6f87d1d2ff3/79385746748.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc719d1d-7471-4692-ad66-8f550b45fbf8/cesur_yeni_dnya_karakterler.pdfIn PDF document text
    • https://s3.amazonaws.com/sowirutelevolur/zozonovuxidutanibemuruba.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ea3db009-9ea6-4234-94cd-748345476f17/dark_souls_chaos_randomizer.pdfIn PDF document text
    • https://s3.amazonaws.com/dowavelaxam/tiwopizidoderolisorab.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/47d096a4-d727-4bb7-88f7-8a6bbdd81245/ralphie_magic_school_bus.pdfIn PDF document text
    • https://s3.amazonaws.com/ladojenefe/schwinn_aluminum_comp_6061.pdfIn PDF document text
    • https://s3.amazonaws.com/jixerubowi/12458414016.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_off0000b94f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB94F 5240 bytes
SHA-256: dcde6a2297b6a41f10ac37f5aa1fbda81f065fe7d52b685baa4d1893fab6dd4a
font_01_sfnt_off0000cb43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB43 10756 bytes
SHA-256: cab156f72e0e5aaf4b97b91f33c56822dc6d337530e10151971627e0a779b02b

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