Malicious PDF — malware analysis report

Static analysis result for SHA-256 20b293a25eef4c09…

MALICIOUS

PDF

84.0 KB Created: 2021-04-23 18:32:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 2d928aa305391a95fb087fb767997314 SHA-1: 8a972ce57a88a86a53df34c72d7a18911047e992 SHA-256: 20b293a25eef4c09796bf6d799aabd6c0de9cb68d41f692d4dcf64cbc76985a2
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 0.9991

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://pelibifir.ru/strik?utm_term=what+is+tp+link+av500 PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4388407/normal_5fe3498e43aed.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454161/normal_600f07a55f953.pdfIn PDF document text
    • http://leadtop.co/delegation_poker_kartenzdh7y.pdfIn PDF document text
    • http://xazupadapafow.mypressonline.com/spelling_rules_english_language.pdfIn PDF document text
    • http://8gusevshop.space/heading_matching_exercises_ieltsfhose.pdfIn PDF document text
    • http://piwofoterif.sportsontheweb.net/spelling_exercises.pdfIn PDF document text
    • http://rollernefritmassage.xyz/vawugimobuvefiklqzkx.pdfIn PDF document text
    • http://straponartist.com/tesla_model_3_long_range_used_pricer11h8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379618/normal_5fcaf4371f2b6.pdfIn PDF document text
    • http://help-bluebadgecustomer.com/fawekaxojakobomon8mgb4.pdfIn PDF document text
    • http://twenty-promo2020.ru/what_is_the_difference_between_32_and_64_bit_computers05p0p.pdfIn PDF document text
    • http://my-favshopd.online/645986511765se4c.pdfIn PDF document text
    • http://vidclips.design/color_by_number_worksheets_free_kindergartenyipfj.pdfIn PDF document text
    • http://on-arenas.com/how_to_record_a_sale_of_an_asset_in_quickbooks0fvz9.pdfIn PDF document text
    • http://ipai.online/vevexetefipivonetfd9p.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/pidufozu/pogonugadetizonezosesafed.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/08913cf9-8bed-4ae6-9276-cd2fc680c9c9/wolf_oven_not_heating_evenly.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f493f06-af0b-4833-a0a0-66becbc237ac/how_to_read_coleman_hvac_model_numbers.pdfIn PDF document text
    • http://moxosutemow.onlinewebshop.net/hey_you_chords.pdfIn PDF document text
    • https://s3.amazonaws.com/zerepuzuze/how_fast_is_a_kawasaki_mule_4010.pdfIn PDF document text
    • https://s3.amazonaws.com/posaxugidut/52610857239.pdfIn PDF document text
    • https://s3.amazonaws.com/xapijifas/debussy_la_mer_piano_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/fixararololu/89102173349.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ef32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF32 5212 bytes
SHA-256: 7591c62c2ef4f4143f59e4a6883ff24c05ff9b94bdd2fa1d8a470ffebefa8375
font_01_sfnt_off000100fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100FD 12808 bytes
SHA-256: a5b53526d23c1cba126d13ad7295be9c5981fb3bcf3b6dba08a104a40eb36d6e
font_02_sfnt_off00012b42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B42 16204 bytes
SHA-256: 541fa2b6826b0add99b7d5a173ef1e6a5567607b5192f75b810eb17d6a563501

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