Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a594f38cf06bb12…

MALICIOUS

PDF

78.9 KB Created: 2021-04-09 19:30:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 5e4c0313f72f1e022a7caf149c8324c3 SHA-1: 57a072f83fed6aebcdc3cfed5982d0f2bf746579 SHA-256: 6a594f38cf06bb1217c5a7182ccd5585f05f219acdb315a1550337f2f40ff689
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains a heuristic firing for PDF_SEO_LINK_FARM, indicating a large number of external links, one of which is to 'kuzutuzo.ru'. The document body is heavily obfuscated and appears to be a lure related to reloading powder. The presence of external links and the nature of the heuristics suggest a phishing or malicious content distribution attempt, likely using a spearphishing attachment vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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.
  • 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://kuzutuzo.ru/strik?utm_term=hodgdon+reloading+powder+for+sale PDF link annotation
    • http://wewazer.iblogger.org/1753632583.pdfIn PDF document text
    • https://cdn.sqhk.co/jawefujivi/jwyRrid/62467980163.pdfIn PDF document text
    • https://cdn.sqhk.co/dewavasese/bigzif4/xeloxomodalogub.pdfIn PDF document text
    • https://cdn.sqhk.co/telivagawu/enheify/molipufitafevedomuwe.pdfIn PDF document text
    • https://cdn.sqhk.co/zonurubo/hjiigiF/34850869792.pdfIn PDF document text
    • http://worelimupuvefam.mywebcommunity.org/36172641803.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/zidenigad/89743306897.pdfIn PDF document text
    • https://ea0a6730-5b47-42bc-899c-5b27b21b32ea.filesusr.com/ugd/184298_cac2d18692094cd6ac105dbf047e085f.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/bc4318db-5afa-4214-bc53-748cc1ff9092/venosezoj.pdfIn PDF document text
    • https://s3.amazonaws.com/xuzakob/46889353512.pdfIn PDF document text
    • http://mibofive.epizy.com/harvest_moon_light_of_hope_crops_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/gawabog/domekinububi.pdfIn PDF document text
    • http://zijiwaras.onlinewebshop.net/active_and_passive_voice_tense_chart.pdfIn PDF document text
    • https://s3.amazonaws.com/muvojugejoxip/are_lazy_boy_recliners_guaranteed_for_life.pdfIn PDF document text
    • https://711a90e7-97f2-4eab-8690-3003ec1e9b64.filesusr.com/ugd/a0905b_29c3893fb77340b384bf607600be8bf9.pdf?index=trueIn PDF document text
    • https://4c72699b-aa2e-4dc8-8bd5-1a54e8f938a6.filesusr.com/ugd/f3cb45_959da6f145dd4ab7aeb7717b48e27b7a.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/984cac16-5319-43cb-8e39-861daa7f588d/what_is_the_best_rod_for_saltwater_fishing.pdfIn PDF document text
    • http://xuvuzonixo.onlinewebshop.net/fozupiwoxosiwutalis.pdfIn PDF document text
    • https://a4067306-84c0-45ce-9c36-3cbb795fcb37.filesusr.com/ugd/d5b970_bfa3c21f9b814e288b6fd031c40d15f8.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f5f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5F4 5260 bytes
SHA-256: 882b9b4404e380a6218722bbe14946e47ec3b7af6de4ac5a982b7605f4d7acbd
font_01_sfnt_off000107ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107FF 11300 bytes
SHA-256: 0080d12f9ab1f455060bc578d7a83cff0812a088c882d8ad081d90e2127f2a0a

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