Malicious PDF — malware analysis report

Static analysis result for SHA-256 c344da6110c100ef…

MALICIOUS

PDF

83.9 KB Created: 2021-02-02 11:07:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: e2176dcd115477239f48ef448b072149 SHA-1: 96148c693cf7c640617d4798063765010c68b1dd SHA-256: c344da6110c100ef9c1b7649d4a5f2c0b0ae67e422914a4cb41e262ab5a55a69
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm used for phishing or malware distribution. The document body, though heavily obfuscated, contains references to 'Michelin star guide 2019' and 'wkhtmltopdf', likely a lure to disguise the malicious nature of the embedded links.

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/aws?utm_term=michelin+star+guide+2019 PDF link annotation
    • https://kibapeti.weebly.com/uploads/1/3/4/5/134515129/javedagupimot.pdfIn PDF document text
    • https://cdn.sqhk.co/punipopi/iaieESa/rechargeable_batteries_with_charger_nz.pdfIn PDF document text
    • https://cdn.sqhk.co/risejesob/ijdhaih/madness_combat_project_nexus_unblocked.pdfIn PDF document text
    • https://tumumasozoborux.weebly.com/uploads/1/3/1/4/131453535/b595d78ed660.pdfIn PDF document text
    • https://fuxureriwixivo.weebly.com/uploads/1/3/0/7/130739224/7659f.pdfIn PDF document text
    • https://lovarewido.weebly.com/uploads/1/3/4/3/134322716/tatosafajakezu-roxaze-wuzofoj-fowedu.pdfIn PDF document text
    • https://cdn.sqhk.co/sonorizeluwi/JhefFuj/39050478747.pdfIn PDF document text
    • https://gipoxafevipetim.weebly.com/uploads/1/3/1/3/131398102/getako.pdfIn PDF document text
    • http://zikapipumimapo.22web.org/arteriovenous_malformation_brain_causes.pdfIn PDF document text
    • https://jovonawokemurif.weebly.com/uploads/1/3/4/6/134678447/pawutezo.pdfIn PDF document text
    • https://cdn.sqhk.co/rapowipijes/6wDxbhj/star_falls_season_2.pdfIn PDF document text
    • https://cdn.sqhk.co/kitujesijak/ejh1jgg/60249011015.pdfIn PDF document text
    • https://cdn.sqhk.co/sojowidaz/o9jjwgi/latest_mlb_covid_news.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sosozodazu.epizy.com/58877503316.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_off00010508.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10508 5688 bytes
SHA-256: b31c3552e81b4b4137602e867d3991c07d15693397c9ce8ff1e61205694b1c5d
font_01_sfnt_off00011867.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11867 14828 bytes
SHA-256: a93d6248c23482592dd105427e9b1fbbb96cc34a0b1f526981e13556ef92e8cf

Open this report in the interactive analyzer, or submit your own file for analysis.