Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e57ede2ebd40475…

MALICIOUS

PDF

87.9 KB Created: 2021-03-31 07:56:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 04db269ed1bb53d0176dcb6d41f5e30c SHA-1: 7318537b6410d3bd6670a635e1ad7243e8381eae SHA-256: 6e57ede2ebd40475b8bbaaf75b98dcd2d6370fb7a8fd2984e9418d74b865988f
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://druttle.ru/123?utm_term=fake+calling+app+free PDF link annotation
    • https://cdn.sqhk.co/vusabutam/Nhjichd/jigugomolifurur.pdfIn PDF document text
    • https://lanufuxag.weebly.com/uploads/1/3/0/9/130969896/8195464.pdfIn PDF document text
    • https://bufaxivija.weebly.com/uploads/1/3/1/3/131383981/9779630.pdfIn PDF document text
    • https://cdn.sqhk.co/vazedibimi/8ibiezQ/teddy_roosevelt_terrier_puppies_for_sale.pdfIn PDF document text
    • https://wepopoxewu.weebly.com/uploads/1/3/1/1/131164118/e454bfb1abd.pdfIn PDF document text
    • http://vipadminler.org/how_much_to_replace_heat_exchanger_ukgli9x.pdfIn PDF document text
    • http://sevastopol.sale/sunewusufojozuvexogr00n.pdfIn PDF document text
    • https://cdn.sqhk.co/binuwaxe/OjgdRih/66709678316.pdfIn PDF document text
    • http://5coupons.info/78181330966fb34n.pdfIn PDF document text
    • https://cdn.sqhk.co/tikalamin/Epjihiv/giremijepemuxuzorowu.pdfIn PDF document text
    • https://cdn.sqhk.co/linewebozid/XieAHhj/packer_game_today_radio.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
    • https://s3.amazonaws.com/kubafezin/nextbook_10.1_charger.pdfIn PDF document text
    • http://pikarofuwab.epizy.com/zokubizaz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/63bf15d7-0a4b-4e65-b1ed-b48e3826f943/65363317645.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b39cd04c-5c2c-4345-a3b9-69269b91d73d/63184801801.pdfIn PDF document text
    • https://s3.amazonaws.com/ziwuvijevo/toro_timecutter_ss4235_bagger.pdfIn PDF document text
    • https://s3.amazonaws.com/gumagabu/82197535303.pdfIn PDF document text
    • http://gurimufibefuw.rf.gd/95938775496.pdfIn PDF document text
    • https://s3.amazonaws.com/wetevali/21431741911.pdfIn PDF document text
    • http://wujawejibizub.epizy.com/bozaja.pdfIn PDF document text
    • https://s3.amazonaws.com/toliwudalamem/control_system_theory_gtu_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd8dc19f-ee94-4201-ad9a-b63aadb6240b/6202772216.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/602a3752-2c41-4337-b824-5b6561b8b6d1/how_much_does_a_digital_marketer_earn_in_canada.pdfIn PDF document text
    • http://duxejuxaxeze.epizy.com/can_altos_sing_soprano.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_off00010cb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CB1 4624 bytes
SHA-256: 78984b343bbf7c2b38bd5f99dcfead6a48da803db9483fa4b552db7b904ab068
font_01_sfnt_off00011c70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C70 11640 bytes
SHA-256: 4f51ac45ff50bb9844019b6aa87a479f3c53644da8ee58c989a8b37dd9acf168
font_02_sfnt_off000143fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x143FD 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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