Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f1ee973ac5a23bf…

MALICIOUS

PDF

76.3 KB Created: 2021-05-04 01:40:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 3349685138b4fc3a15ec5f8467182f5d SHA-1: d59e640bfeab522b85e59f099f4239d7ed41d3a8 SHA-256: 7f1ee973ac5a23bf4cce7acca1d679f4179156b8542004c88b888d61ec4e1787
126 Risk Score

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 0.9998

Heuristics 5

  • 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.
  • 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://crophysi.ru/strik?utm_term=node.js+design+patterns+-+third+edition+packt PDF link annotation
    • https://dazifonawifebi.weebly.com/uploads/1/3/4/7/134763946/konokifupedog-povasixepulom-jaxibivutufuvu-rodudelo.pdfIn PDF document text
    • http://scarcebook.com/cross_stitch_thread_storagek2gjg.pdfIn PDF document text
    • http://molefomisapeput.mypressonline.com/70417157678.pdfIn PDF document text
    • http://presentinsta.site/watercolor_happy_birthdaylje6r.pdfIn PDF document text
    • https://daxixulo.weebly.com/uploads/1/3/1/0/131070202/2366283.pdfIn PDF document text
    • https://gawigunemotiri.weebly.com/uploads/1/3/5/3/135320142/xegimifivomusiso.pdfIn PDF document text
    • https://lukazerud.weebly.com/uploads/1/3/4/3/134343231/8674988.pdfIn PDF document text
    • http://samyog.ru/7918911967gkcyk.pdfIn PDF document text
    • http://de-bewertung-id-q2e5t23.top/475888429567hmsz.pdfIn PDF document text
    • http://jigikujed.scienceontheweb.net/gusagepipaketog.pdfIn PDF document text
    • https://roxeviviko.weebly.com/uploads/1/3/5/3/135317288/8b8eb8.pdfIn PDF document text
    • https://dujililapute.weebly.com/uploads/1/3/5/3/135347223/4033672.pdfIn PDF document text
    • http://iranianvc.com/best_pressure_cooker_air_fryer_combo_2019e3wbt.pdfIn PDF document text
    • https://zavowije.weebly.com/uploads/1/3/2/6/132680855/zunukikubude_zevanarisebi_ripijesivebex.pdfIn PDF document text
    • http://physcoo.com/cmake_tutorialmo71s.pdfIn PDF document text
    • https://poxixarusel.weebly.com/uploads/1/3/4/1/134131789/798086.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/toguvaju/35245887829.pdfIn PDF document text
    • https://s3.amazonaws.com/datarofapakil/cisco_meraki_vpn_client.pdfIn PDF document text
    • http://wazeniwemir.onlinewebshop.net/paberunelajinow.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_off0000de4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE4E 5476 bytes
SHA-256: 366847ffe3a30d4c8658fc5f5c68bb653c777710bd08375cc5acb3a352c472a5
font_01_sfnt_off0000f0f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0F6 3348 bytes
SHA-256: 13117aa077090c3c0e68e93d7ba8ef8e9e4b5975f9a36d79aacf606a6ed765ce
font_02_sfnt_off0000fe2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE2B 10924 bytes
SHA-256: 5edcbfb027828b8737f845965b682740ed94fb504fe3076aaa4c4ea1751576e5

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