Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5a1c2edd9e5c2e0…

MALICIOUS

PDF

79.6 KB Created: 2021-03-10 18:03:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: edb2b165a3282239d5a498d5a9670a5c SHA-1: f2a669df58c69a57c7fc92602c12890cdfb4feea SHA-256: a5a1c2edd9e5c2e0fc0445ea45b16557624616eacea325b26320601c7fe12728
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 0.9998

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://baarspo.ru/wix?keyword=bissell+carpet+cleaner+instruction+manual PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4444123/normal_5fdba36c87ae0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402246/normal_5ffc472b8875c.pdfIn PDF document text
    • https://vabuxijipureg.weebly.com/uploads/1/3/4/4/134476882/pumexefeb_bakejatiz_posiguvotur_fevexivupijijex.pdfIn PDF document text
    • https://rebejudan.weebly.com/uploads/1/3/5/3/135316845/1590166.pdfIn PDF document text
    • http://tigatixe.iblogger.org/mafabokutepuxe.pdfIn PDF document text
    • https://nexijapa.weebly.com/uploads/1/3/5/3/135309594/ledavinusoxaf-tesiwadetajire-jufuwolituf-pafogozizoraj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444877/normal_5fd31cbaa8ac6.pdfIn PDF document text
    • http://vizezokope.iblogger.org/14095559156.pdfIn PDF document text
    • https://jofovumilaj.weebly.com/uploads/1/3/2/6/132681264/449f1f70b8c3613.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372719/normal_5fea35085121b.pdfIn PDF document text
    • http://negeduji.66ghz.com/9682022762.pdfIn PDF document text
    • https://nuvafuriwevejuf.weebly.com/uploads/1/3/2/8/132814848/rewipafazexuvux.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zasasopatadinu.epizy.com/difobalusake.pdfIn PDF document text
    • http://pifimofizo.rf.gd/campbell_hausfeld_5_horsepower_20-gallon_air_compressor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c21715a9-480d-4e70-a952-e096f6d0f48f/delonghi_safeheat_fan_heater_-_hfx65v15ca.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a68988b2-b5b1-41a6-afae-a009ff8e5963/blues_guitar_riffs_acoustic.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/84314e1a-5be4-4d15-ad35-0b6c97d4ec97/48708296378.pdfIn PDF document text
    • http://gasigigi.rf.gd/engagement_letter_template_for_solicitors.pdfIn PDF document text
    • http://witoluteg.epizy.com/doxewonerokafinakasuga.pdfIn PDF document text
    • http://zemadepa.rf.gd/certificate_of_conformity_template_australia.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_off0000fb5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB5D 5128 bytes
SHA-256: b4cb7751078553b0bbd9b0a4a6b0616d46a99b393fa6ab105b883f852a264090
font_01_sfnt_off00010cbc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CBC 10740 bytes
SHA-256: 4b8f12d41e61f854d7b3f8a8f0424b9039d11eda07cdbed255a1de0fe7347681

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