Malicious PDF — malware analysis report

Static analysis result for SHA-256 6da6275f28ac9155…

MALICIOUS

PDF

78.4 KB Created: 2021-03-01 09:42:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 625eb6f7874262cab0f9bf7315e4da0b SHA-1: 32f7ab64d8144025fb003318b9cd066ad1c80c1f SHA-256: 6da6275f28ac91554fb8abafbb98636e6010ccc8f184afcda3b1ecf9945d232c
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The embedded URL 'https://leonvi.ru/strik?utm_term=what+did+the+constitution+act+of+1791+create' and the PDF link 'https://cdn.sqhk.co/pinufizugal/jdqlKPs/egg_free_pancake_recipe_uk.pdf' are key indicators of this activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://leonvi.ru/strik?utm_term=what+did+the+constitution+act+of+1791+create PDF link annotation
    • https://cdn.sqhk.co/pinufizugal/jdqlKPs/egg_free_pancake_recipe_uk.pdfIn PDF document text
    • https://texapusozos.weebly.com/uploads/1/3/1/4/131407592/masimupuwi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471464/normal_602a41529a850.pdfIn PDF document text
    • https://zodixezujiz.weebly.com/uploads/1/3/5/3/135345824/4509383.pdfIn PDF document text
    • http://site-shop.xyz/digital_signal_processing_using_matlab_and_waveletss3cm3.pdfIn PDF document text
    • https://fefumuvujudadi.weebly.com/uploads/1/3/1/6/131606087/dapajaf.pdfIn PDF document text
    • https://dutofubexel.weebly.com/uploads/1/3/4/6/134631161/9093154.pdfIn PDF document text
    • http://erogan-columbia.site/sewelamujovezirafasigocx9q.pdfIn PDF document text
    • http://busforpay.online/13848946965j0919.pdfIn PDF document text
    • https://cdn.sqhk.co/lexoxuxoluvi/iihijil/27862641244.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4483361/normal_5fe2bfd97c1ef.pdfIn PDF document text
    • https://fafevidelaxikez.weebly.com/uploads/1/3/4/4/134481631/2692366.pdfIn PDF document text
    • https://jenafowumavadas.weebly.com/uploads/1/3/1/4/131437472/9567168.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377102/normal_5fced53da39ac.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tanikanaw/setorevo.pdfIn PDF document text
    • https://s3.amazonaws.com/levumoduf/pezetesolu.pdfIn PDF document text
    • https://s3.amazonaws.com/wupiwupiwot/bomiximukamigar.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_off0000f48e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF48E 5380 bytes
SHA-256: 01e6390648331994c1cf3184bbd2579b44aca5a8799ebaa4e91d832da8c5423c
font_01_sfnt_off000106ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106ED 10360 bytes
SHA-256: bd92ec2dc6e5792e92f6e8ca08ece10ab94f113dd9a7ea55d78bb70d4795f98d

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