Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5a6b21331638016…

MALICIOUS

PDF

120.1 KB Created: 2021-03-15 05:19:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 2701ccfdd72fc1f4ea2c73fd084c3f4d SHA-1: 832214b8272650e28b4f7ab2e564d87babffbdff SHA-256: f5a6b21331638016782dc912516b700de497f08bfde79b6365253e3219973575
186 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. 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 0.9997

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://dugedepap.ru/123?utm_term=bandar+wala+game PDF link annotation
    • http://jaralet.getenjoyment.net/zuxebatatubagijesigomuv.pdfIn PDF document text
    • http://usblighter24.site/jusogasigufe61qg.pdfIn PDF document text
    • http://realwockyc.info/is_maritime_law_lucrativeakcks.pdfIn PDF document text
    • http://copyright-securityx.com/lanimalisme_est_un_anti-humanismec5g0r.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://uploads.strikinglycdn.com/files/7c2d1079-ffcf-4026-8816-a42011a16a3e/74695074292.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3a77d0f8-ba18-49ee-9529-892a2a953f4a/what_are_the_first_five_books_of_the_law.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b42d05b9-7edf-4646-8355-8c0842269fda/gilizixeto.pdfIn PDF document text
    • https://e6676b24-921d-4f57-8fca-beda98688f3c.filesusr.com/ugd/144d27_ad4c30598f624150befd50a6cb74fada.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/75563967-1f87-45d9-a6aa-1d1385f72ee3/50791199702.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b7fc0496-564b-420b-aee6-e4b5db662287/lonely_planet_eastern_usa_book.pdfIn PDF document text
    • https://58eafb2e-ea74-4523-a1b2-d2e0fe9bfe54.filesusr.com/ugd/466fa0_a59156f4391740b79f73c28686c06a6b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/negonanopix/74510675781.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5933e8c2-8f7a-4f7d-bee6-8bbd017bc66b/renuruxufoxigeviwux.pdfIn PDF document text
    • https://s3.amazonaws.com/rurosaveruk/electrical_questions_and_answers_for_interview.pdfIn PDF document text
    • https://s3.amazonaws.com/mesixadelomomo/64070133092.pdfIn PDF document text
    • http://gozidonozali.myartsonline.com/mitsubishi_mr_slim_inverter_error_codes.pdfIn PDF document text
    • https://s3.amazonaws.com/wolina/aloker_ei_jharna_dharay_bengali_song.pdfIn PDF document text
    • https://s3.amazonaws.com/wegemebufojafak/dun_and_bradstreet_company_credit_report.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b5fc80e6-3622-4959-b08f-db127bd4c744/joel_goldsmith_meditation.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2324268c-261e-4ffc-8d28-fbdb70e15347/xupugifumi.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_off00018eb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18EB1 4660 bytes
SHA-256: 9961158d4be4c73b60222db3497d879e47a627fdbdd5c2490b14224ad8165cab
font_01_sfnt_off00019e66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19E66 11180 bytes
SHA-256: fccf63e9d0eabc97881aec078b9d3a866336355bc275db7b831135541d41788d
font_02_sfnt_off0001c489.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C489 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e