Malicious PDF — malware analysis report

Static analysis result for SHA-256 c79ba39d9dd56837…

MALICIOUS

PDF

73.2 KB Created: 2021-03-25 18:24:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 77b2462d7705da227c9ed25587d65ad7 SHA-1: 93b94c3411dab2019a98f10d44b9ca3fa6710db9 SHA-256: c79ba39d9dd568376aac62c54987ea6164d6a0301d451d68a4a3950be113f097
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 0.9997

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/123?utm_term=cambridge+fce+practice+tests+answers PDF link annotation
    • http://rodsfish.club/tracker_app_nows7jc2.pdfIn PDF document text
    • http://oficialshoes.site/41716539249mx210.pdfIn PDF document text
    • http://xuwuvewisin.mypressonline.com/brochure_template.pdfIn PDF document text
    • http://anyita.space/10485082273udp4j.pdfIn PDF document text
    • http://wisitens.online/cocktail_semi_formal_dress_code_malej1pec.pdfIn PDF document text
    • http://topmassage.net/zudapulqzsy.pdfIn PDF document text
    • http://nobupefigobir.iblogger.org/fefudunasejifazad.pdfIn PDF document text
    • http://cocobuka3.xyz/62338816307ul7rf.pdfIn PDF document text
    • http://topsalon.xyz/1439176678uz49w.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/5b08863d-e843-47dd-ab1e-4366dd184dd6/lowrance_hds_7_gen2_touch_price.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/37ed3f5d-f9ba-437c-9c4a-caaa30738bcb/20186324297.pdfIn PDF document text
    • http://bexovivuvere.myartsonline.com/xiloj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c9c54cf-8d95-4bab-add8-b3a2e5ebd47b/the_100_book_2.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/194389ee-c022-4722-8849-c26e1d9583b7/how_does_it_make_you_feel_jw_lyrics.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/62186efd-fc62-485f-97be-de6d773d78a3/4_words_game_level_21.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/59576c3b-612b-462f-bd92-4c7e1051502f/vezalulizokavazet.pdfIn PDF document text
    • http://tubuzezaw.rf.gd/zaminab.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b5b13a5d-c6eb-46b0-a479-54617bcd1a82/newtons_laws_of_motion_brainpop_quiz_answers.pdfIn PDF document text
    • http://dogiwexor.myartsonline.com/harry_potter_movies_streaming_service.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ccd4b122-b3f1-468b-ba1b-704e2959bb46/kenmore_600s_washer_lid_lock_bypass.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db7247a7-c51d-46cd-ba52-3e4ac7189556/los_tipos_de_comunicacin_verbal.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000df0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF0D 5580 bytes
SHA-256: a9a4960eb55d35ab95ec37c6a5dc1e7a50613eb13fa5fe7124590a7785d04892
font_01_sfnt_off0000f1fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1FA 10512 bytes
SHA-256: 28d4d7de1f33299721367469c4ef2d93444d821ba87087fb4c02c883418d4fdc

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