Malicious PDF — malware analysis report

Static analysis result for SHA-256 61f3818fb7a8f326…

MALICIOUS

PDF

72.7 KB Created: 2021-03-11 07:47:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-13
MD5: 4e7d96a59b39e8d66d0725d8cac5a655 SHA-1: fa17af7aab8e9f1352a423b87949a8c2298d9315 SHA-256: 61f3818fb7a8f326deaa088bd6a50c88152ede1da295bbdb8d9c35c3726ae21e
126 Risk Score

Malware Insights

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

The PDF file contains embedded URLs and heuristic detections indicating it is a phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The primary URL points to a site that likely hosts further malicious content or phishing pages, disguised as a user manual.

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://seumenha.ru/wix?keyword=manual+de+usuario+lavadora+whirlpool PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4462992/normal_6048248b92e86.pdfIn PDF document text
    • http://igonlinesupport.com/gokano_points_generatoro0x3x.pdfIn PDF document text
    • http://rasprodavaika.ru/guzujagajimifufasijgdth.pdfIn PDF document text
    • http://gidpopiteru.com/ponateribexiretesekaziba4gusu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367952/normal_60023981264c4.pdfIn PDF document text
    • http://xariketixagat.mypressonline.com/bizebebup.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://6ba8113a-99dc-4618-97bf-d7180f10ff72.filesusr.com/ugd/b6edda_cfca1dd022dc4855a2dd120ccfb85ae5.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zoxewudunigus/wpf_listbox_datatemplate_different_types.pdfIn PDF document text
    • https://091a8774-b5bd-4fb7-8799-8d1ca0ca44ad.filesusr.com/ugd/8716ab_e456d86e88a2417bba640b4c74f57201.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/108ff5be-4002-4590-8f4f-71652baf96c2/xiwizixal.pdfIn PDF document text
    • http://jimomurapujivo.onlinewebshop.net/think_of_me_fondly_lyrics_phantom.pdfIn PDF document text
    • http://givetupazowo.onlinewebshop.net/74994346995.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d14b0575-969f-4c3a-82c5-09c3a4342908/xamiliwogugog.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5ebcf8fe-f5b9-4c15-97d1-37df913068aa/programming_data_structures_and_algorithms_using_python_nptel_answers_week_1.pdfIn PDF document text
    • https://s3.amazonaws.com/viboxikuz/grade_3_science_worksheets_free.pdfIn PDF document text
    • https://s3.amazonaws.com/xisefowu/beginners_guide_to_starting_your_own_business.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_off0000de27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE27 5204 bytes
SHA-256: a60f4facc2e2c3ea746d415b86fded5ae9e3065cc6f4bd369764c5b8a9be58de
font_01_sfnt_off0000eff2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFF2 11468 bytes
SHA-256: c3227e7601e4f894f6f4c3d9649ccb1b141f7a76c06fc5e5e93624b2f98b08f1

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