Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d640ce0759d38d7…

MALICIOUS

PDF

153.4 KB Created: 2021-03-22 22:06:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 9e0bd2ffec73bc0c1c9fe0a49a7f1ef2 SHA-1: be0f9913c2e1c27a59a988c42d802a2b00c4f8ca SHA-256: 1d640ce0759d38d7dfe69da3a7d6612a8c7c42610a4f904fc98fa28826b20d80
134 Risk Score

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. It uses an urgency-based lure. 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 0.9993

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
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://baarspo.ru/wix?keyword=generac+megaforce+6500+manual PDF link annotation
    • https://cdn.sqhk.co/vigasigetogi/Uifu2jf/87429542178.pdfIn PDF document text
    • https://rigivopamakor.weebly.com/uploads/1/3/4/8/134869382/divipuwokonedupubox.pdfIn PDF document text
    • https://zatugole.weebly.com/uploads/1/3/1/8/131856706/2954896.pdfIn PDF document text
    • https://cdn.sqhk.co/belexewuwif/wdvhgji/golden_boot_winners_world_cup_england.pdfIn PDF document text
    • https://zosagobe.weebly.com/uploads/1/3/1/3/131380163/4032755.pdfIn PDF document text
    • https://sokedafagu.weebly.com/uploads/1/3/1/4/131437755/84346b63b.pdfIn PDF document text
    • https://somigoduwus.weebly.com/uploads/1/3/4/4/134470899/gepegexuw-resud.pdfIn PDF document text
    • https://cdn.sqhk.co/numokafas/dIRPEie/nintendo_switch_online_costo.pdfIn PDF document text
    • https://cdn.sqhk.co/lilaxikixo/6QgijcH/90055043397.pdfIn PDF document text
    • https://jopokiwajisi.weebly.com/uploads/1/3/4/1/134108554/xitobotifiwepi-wesidepu.pdfIn PDF document text
    • https://nopeludaseji.weebly.com/uploads/1/3/3/9/133986928/2693598.pdfIn PDF document text
    • https://cdn.sqhk.co/jabosuve/jfb5ngg/parentsquare_app_store.pdfIn PDF document text
    • https://gutavavoz.weebly.com/uploads/1/3/4/0/134000423/bagug-fegupiwogax-jemepegixijun.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://02ee9779-94d6-4ec7-959f-c0f99fe19a35.filesusr.com/ugd/cdc607_b424a3a6f8e441858ca1ff0c9e70010d.pdf?index=trueIn PDF document text
    • https://569961a5-e6b5-462d-8b38-7193d5e7b20b.filesusr.com/ugd/a37a2e_f51077592679464fac797e60a61d21d6.pdf?index=trueIn PDF document text
    • https://1c54689f-8f60-44d8-8d81-b144d6ea8ada.filesusr.com/ugd/787b0a_49ee086267ec4631bc3fdf9cba3ec41c.pdf?index=trueIn PDF document text
    • https://a0f1d9c0-ea46-4e0e-9383-d87711d3127f.filesusr.com/ugd/1e3fb7_9a6ea826d8284ec2abf4f66e9c2893ac.pdf?index=trueIn PDF document text
    • https://3e021c9a-284a-4c54-9ba1-f6d43d4d2ba5.filesusr.com/ugd/a619af_caad5c76716a465b886580692ebbe175.pdf?index=trueIn PDF document text
    • https://793776f3-68b4-44d3-947a-596ce2c6f652.filesusr.com/ugd/4e977a_4b95b4e4c9204b9dbe3e8f897788eb7e.pdf?index=trueIn PDF document text
    • https://ab60d57a-1f92-408f-9079-0b325776b613.filesusr.com/ugd/724fb5_d235b496bf0f48afb1c781f0551d0baf.pdf?index=trueIn PDF document text
    • https://41fe7446-7195-45c8-906d-de5e784989f9.filesusr.com/ugd/e02969_958c0d03893a46fab4cb4fbfb00ae3b3.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00020e61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x20E61 5228 bytes
SHA-256: 5c511bac5c5370082f4c56b62ac670eedb50addaaa1bdccff88b6fa9bc17b115
font_01_sfnt_off00022015.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x22015 12324 bytes
SHA-256: 5d31f2c3643ad33b89ef5aea927804255601be96f440787461b99dcf19685e66
font_02_sfnt_off000249dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x249DC 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3