Malicious PDF — malware analysis report

Static analysis result for SHA-256 79053c35c9cadc80…

MALICIOUS

PDF

77.5 KB Created: 2021-03-08 22:40:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 85be33a91fb0135369c7060ac41cb5bb SHA-1: 3e7266f87cb1f6b30a448cd69757b9936d3423f4 SHA-256: 79053c35c9cadc8090957217016a2b7a357c3a5add117ff0a1706ec7fe89566a
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://jottigo.ru/strik?utm_term=link%2527s+awakening+seashells+rapids PDF link annotation
    • http://lunamawel.22web.org/hit_the_ground_running_sheet_music.pdfIn PDF document text
    • https://cdn.sqhk.co/kedilexele/TZJncGo/five_nights_at_freddy_s_2_scratch_demo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501656/normal_602619307c878.pdfIn PDF document text
    • http://nekimul.22web.org/19851217357.pdfIn PDF document text
    • http://monetobo.iblogger.org/10521610245.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445889/normal_60028e40ece74.pdfIn PDF document text
    • http://zakozoxutujo.22web.org/40590297546.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425737/normal_5fdc6af406395.pdfIn PDF document text
    • http://sdfsdfsdf.shaketorch.com/63303879024.pdfIn PDF document text
    • https://cdn.sqhk.co/rapovebakeb/UlJgcl1/barcelona_events_august_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/ximirujusuxo/gql6hh3/acrylic_nails_set_cost.pdfIn PDF document text
    • http://pifibunevivumo.iblogger.org/92093203584.pdfIn PDF document text
    • http://limebago.iblogger.org/rodebufud.pdfIn PDF document text
    • https://cdn.sqhk.co/xumesapaxoku/jiN9jiM/sogebank_haiti_routing_number.pdfIn PDF document text
    • https://cdn.sqhk.co/botonerepap/exgcjet/36477875624.pdfIn PDF document text
    • http://pafiwuz.66ghz.com/animal_classification_worksheet.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gikosetopetidun.rf.gd/phyllo_pastry_sheets_woolworths.pdfIn PDF document text
    • https://aeedc83c-a41d-4179-9d48-e770e4c4cd47.filesusr.com/ugd/e010a7_bbfa9481238c4588b0d244252df60849.pdf?index=trueIn PDF document text
    • http://texagofudadeket.epizy.com/xekisujumo.pdfIn PDF document text
    • https://13fad4bf-7224-44b3-802b-16842e97d241.filesusr.com/ugd/b14664_29702b09d35948a3ae31842aff429456.pdf?index=trueIn PDF document text
    • https://76c9fb28-c10e-4950-85be-37de24a2ede8.filesusr.com/ugd/fa32a6_74dbb513b28042c6967bdbc8d391c5ea.pdf?index=trueIn 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_off0000f1a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1A1 5352 bytes
SHA-256: 9ea40729ce8ab29caf76dcfa917a43cded23efc296fd19324b2936fcecd6f9cc
font_01_sfnt_off000103f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103F1 10756 bytes
SHA-256: 0abb60fe5d82d5cebb5dfc5103333d16139b9665de717d3dca61a9d89f158c79

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