Malicious PDF — malware analysis report

Static analysis result for SHA-256 569cc0cae92f4530…

MALICIOUS

PDF

75.0 KB Created: 2021-04-07 20:42:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 685820e0dc67457d244d2498eefeb8dd SHA-1: 91775b86eb49ad5493d8ae53b001d927b0d4068e SHA-256: 569cc0cae92f4530651b081f038f6e6a055d2f6eb33dfdcf9cc4f4371ad2d865
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/strik?utm_term=how+much+does+it+cost+to+maintain+a+honda+civic PDF link annotation
    • http://fresh-ita.space/376214952086kjp5.pdfIn PDF document text
    • http://registrat.space/lelufomuzal5veak.pdfIn PDF document text
    • http://lezirumari.sportsontheweb.net/4543827307.pdfIn PDF document text
    • http://cabinetsly.xyz/rt-ac66u_reset_admin_passwordtx50m.pdfIn PDF document text
    • http://d-youtube.com/introduction_to_sociology_seagull_ninth_editionn41la.pdfIn PDF document text
    • http://nesorus.mywebcommunity.org/commercial_real_estate_lease_abstract_template.pdfIn PDF document text
    • http://merovew.xyz/39068170535gy9a7.pdfIn PDF document text
    • http://pegijegur.mygamesonline.org/dumasowurawokirigububa.pdfIn PDF document text
    • http://honey-love.ru/real_book_christmasznh9k.pdfIn PDF document text
    • http://natiral.space/womasipakebulanidgsx2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369776/normal_604b1e78808fa.pdfIn PDF document text
    • http://walletelectrum.buzz/adventure_of_tintin_movie_720puc6u0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464871/normal_601bfc6ff0cbe.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gototura.myartsonline.com/zetigebefatit.pdfIn PDF document text
    • http://gubawakelu.onlinewebshop.net/case_files_surgery_4th_edition.pdfIn PDF document text
    • https://s3.amazonaws.com/zukogi/an_astrologers_day_summary_questions_and_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/fenatagazise/73679331641.pdfIn PDF document text
    • http://fegoluvarelewum.myartsonline.com/prepositional_phrases_as_adjectives_and_adverbs_worksheets.pdfIn PDF document text
    • http://velelakolifuvu.onlinewebshop.net/nikon_coolpix_l310_battery_price.pdfIn PDF document text
    • https://s3.amazonaws.com/wozowuledij/82299429129.pdfIn PDF document text
    • https://s3.amazonaws.com/dosipive/eagles_buccaneers_injury_report.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_off0000e96e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE96E 5164 bytes
SHA-256: dcf0f59ce5ebd90215ebdfabceaaa556930eaf88bc3c086b4eae7dbf33c35148
font_01_sfnt_off0000faee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAEE 10488 bytes
SHA-256: 3b2b57af4349fbc4c285e12b2c6ca83327f5ac0b2390d4cb6e5e50607071a915

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