Malicious PDF — malware analysis report

Static analysis result for SHA-256 48661ab7c7a2dfb0…

MALICIOUS

PDF

81.3 KB Created: 2021-05-15 12:12:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: dc730760c374e0fd589b9c5f6ecd84a7 SHA-1: b0363621e96dd16dda1117ea0cef6f78d5a82e11 SHA-256: 48661ab7c7a2dfb033143185a479d6084a309043d3d13467c024001c9733c2a9
166 Risk Score
Tags
free-cdn-ebook-manual-lure

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. It uses a password-protected-archive lure. 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 0.9998

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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://druttle.ru/strik?utm_term=biblia+hebrea+traducida+al+espanol+gratis PDF link annotation
    • http://rasezatoxefu.mygamesonline.org/17531109076.pdfIn PDF document text
    • https://cdn.sqhk.co/lepudijazur/3ijdDia/voxikegononaxolidalasemiz.pdfIn PDF document text
    • http://malolufixanovas.sportsontheweb.net/bible_dictionary_in_telugu.pdfIn PDF document text
    • https://cdn.sqhk.co/kitujesijak/4gfCKjx/personal_sticker_for_whatsapp_cara.pdfIn PDF document text
    • http://zevibeponakat.getenjoyment.net/mp3_bangla_book_free_download.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nunavaxukozu.onlinewebshop.net/wulafiw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4cc617a0-7175-4cf4-9879-ceb4bd5f1b53/how_to_draw_cartoons_easily_step_by_step.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/817d3153-635e-43ef-bd16-9399f9216471/momolulov.pdfIn PDF document text
    • http://popofisofol.myartsonline.com/38485449523.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0a4caeed-90ec-4542-8565-9b45086673d6/reading_comprehension_test_class_8.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8b5fb5db-892d-40f4-87ed-d13e148e1698/bemozuveb.pdfIn PDF document text
    • http://bitenozof.atwebpages.com/49610957191.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/840004cd-d32c-48a4-b287-78df483ff59c/mokugawuxowexeb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3763ab10-fd3f-44c8-a94b-f188bddce6af/56219504310.pdfIn PDF document text
    • http://belibivizonojo.myartsonline.com/92453918381.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/638318fa-4d8d-4135-ae94-d395a4d0e1a2/vocabulary_workshop_level_d_unit_4_answers_antonyms.pdfIn PDF document text
    • http://rujidafedisezu.atwebpages.com/important_awards_2020_in_tamil.pdfIn PDF document text
    • http://namepafubi.atwebpages.com/how_to_fight_hand_to_hand_in_cyberpunk_2077.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/71967a65-e69e-4cba-9325-b88888be34a4/casio_g-shock_ga-110mb-1a.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_off0000f7b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7B6 5524 bytes
SHA-256: fb28915ec9d3ece598e41e5e4fe2033dc3df4f664b6cb908f8dae9c33aa4ceda
font_01_sfnt_off00010a73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A73 13744 bytes
SHA-256: 2ac59040b0b50214f2d37caddad796b33c31c65b8b0f34aa316b7d3533ff3af2

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