Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3702ad2a6b064d6…

MALICIOUS

PDF

77.3 KB Created: 2021-06-03 15:48:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 5f2f27cf6ecb3bf0c0f140000ebe7e7f SHA-1: 11a48b7216423f9aa3df043029c05a306189aea4 SHA-256: b3702ad2a6b064d6ec4d027f7e9cd833b0564e07bf3bdd3e3065309893ad031e
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 0.9996

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://infrive.ru/pbw?utm_term=cuanto+es+un+metro+y+70+centimetros+en+pies PDF link annotation
    • https://vejegiraforid.weebly.com/uploads/1/3/4/3/134311029/2587462.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372085/normal_601493d0b2bef.pdfIn PDF document text
    • https://bipixexomalexu.weebly.com/uploads/1/3/4/3/134349320/7fb42407b.pdfIn PDF document text
    • https://dudegakabiwuzab.weebly.com/uploads/1/3/1/4/131406663/3943849.pdfIn PDF document text
    • https://jinokafolamod.weebly.com/uploads/1/3/4/3/134310646/jidawigapol.pdfIn PDF document text
    • https://salapabozob.weebly.com/uploads/1/3/5/3/135326799/2adb98f45a.pdfIn PDF document text
    • https://fezuxikazosulav.weebly.com/uploads/1/3/1/3/131398093/vopasuxujuxuledip.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446399/normal_60674686d3b0d.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4475720/normal_60b6b1c7d020e.pdfIn PDF document text
    • https://denosuzasagi.weebly.com/uploads/1/3/2/7/132712615/xibajejudifip-vuwubote-vefonaxatekijex.pdfIn PDF document text
    • https://nozojotama.weebly.com/uploads/1/3/4/5/134585139/mifekulonitew_xogimopukipige_jezurumejemed_nepenego.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jedilukiwo.pbworks.com/f/how_do_you_reset_a_3_digit_combination_lock_if_you_forgot_the_code.pdfIn PDF document text
    • http://xojifot.pbworks.com/w/file/fetch/144425820/81247938612.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ba87920d-c69d-429e-abac-103eee1371d1/66284930178.pdfIn PDF document text
    • http://wuranosa.pbworks.com/f/how_to_consolidate_data_from_multiple_workbooks_in_excel_using_vba.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe130ef2-52f4-4455-8dd2-68cc3538a6b1/what_is_the_most_famous_quote_in_the_world.pdfIn PDF document text
    • http://biwonuv.pbworks.com/f/teri_ankhe_bhul_bhulaiya_mp3_download.pdfIn PDF document text
    • http://ronakiko.pbworks.com/f/the_business_of_the_21st_century_in_telugu.pdfIn PDF document text
    • http://fixulirulafa.pbworks.com/w/file/fetch/144491259/55758876723.pdfIn PDF document text
    • http://vawijoj.pbworks.com/w/file/fetch/144463407/16043004036.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a18e837e-2589-422f-bdef-911640aa1d07/why_hydrogenation_of_vegetable_oil_is_done.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_off0000ed2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED2A 5276 bytes
SHA-256: f3a48b577cb1466fb1f145f12ee6c27457efbd3b73fee1616a9b883a599f1cca
font_01_sfnt_off0000ff13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF13 11808 bytes
SHA-256: 72e37cfadbbe1f9c3402ac4fd4857079433b75a18d648aeae06b9a4fe37c03db

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