Malicious PDF — malware analysis report

Static analysis result for SHA-256 c164bec0b045c54f…

MALICIOUS

PDF

81.6 KB Created: 2021-03-27 09:57:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 0152eff0b55871919ef94c12eddb0fb7 SHA-1: 739bee2842c06d224363635ee95361b2a18de6b0 SHA-256: c164bec0b045c54f921a59f6941e91891f81c09ab3e182434756df3eb597e387
156 Risk Score

Malware Insights

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

This PDF document was flagged by multiple heuristics as malicious, including ClamAV and an ML classifier, indicating it is likely a phishing or trojan delivery mechanism. The PDF contains a large number of external links, many of which are to other PDF files, suggesting a link farm designed to obscure malicious destinations. One of the primary external links points to 'jacksth.ru', which is likely the initial lure for a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • 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://jacksth.ru/strik?utm_term=what+is+trust+as+per+indian+law PDF link annotation
    • https://cdn.sqhk.co/jotepomi/HeMgcWK/82239405019.pdfIn PDF document text
    • https://cdn.sqhk.co/nosamese/OZbgibz/nuzutagemafokutejajeseni.pdfIn PDF document text
    • https://cdn.sqhk.co/xuwifoviwalo/dk8PhbB/mufowibizubisot.pdfIn PDF document text
    • https://fidimamafiw.weebly.com/uploads/1/3/4/6/134624465/3d19aa9c6.pdfIn PDF document text
    • https://cdn.sqhk.co/fabunavaxa/jeKgg3S/tujogurime.pdfIn PDF document text
    • https://cdn.sqhk.co/revipidamog/ibhe6bu/nemifowebisu.pdfIn PDF document text
    • https://cdn.sqhk.co/ranetixeba/Xjghfic/planet_earth_3_episodes.pdfIn PDF document text
    • https://cdn.sqhk.co/miwiwefe/CKgcmPJ/red_ball_gown_dresses_ebay.pdfIn PDF document text
    • https://cdn.sqhk.co/noluxokeruma/jgfzjhN/best_barcode_scanner_app_for_android_2019.pdfIn PDF document text
    • https://monezoxikaxusoj.weebly.com/uploads/1/3/1/4/131453753/govosavikuzal_kavata_rinesabazaze_novuvogoxuti.pdfIn PDF document text
    • https://cdn.sqhk.co/semexixok/jixvP3z/32161601670.pdfIn PDF document text
    • https://cdn.sqhk.co/lajoroteb/jgkighf/25982329545.pdfIn PDF document text
    • https://lagomide.weebly.com/uploads/1/3/5/3/135304015/3501116.pdfIn PDF document text
    • https://cdn.sqhk.co/masunidupag/buHhjjg/pepeferawasiwavo.pdfIn PDF document text
    • https://cdn.sqhk.co/joraxeneli/gdZjjOo/madenusibik.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://413f70bc-0247-4a04-a3fc-eabb14e2b93f.filesusr.com/ugd/f18ee6_32bf7351e5eb4871823819b9df6d6a49.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/103901c6-64ef-4796-a682-119ef6a99680/what_is_the_best_crochet_stitch_for_a_blanket.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8330bf3b-3d48-4241-a30d-b7406ed6dde1/mamazadewisidumefefawox.pdfIn PDF document text
    • https://083189c9-8220-4687-a375-57be19a37228.filesusr.com/ugd/909b15_06e15fd523204fc4a7fae604155bb79f.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/4153e59d-56fb-4369-97d6-826945f9d234/kijusitibixame.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c0d5de71-9b2c-4345-887d-8c5385381fa1/68926892025.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_off0001010e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1010E 5152 bytes
SHA-256: 8a016e6af19e6f3ac57b4e804456eafc2136b061114c52f89ada2557cc5962c7
font_01_sfnt_off000112a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112A1 11312 bytes
SHA-256: 5bcc7bc051cf5751902c4d0ca9e545f0b34838844f98a57c0413559b569ca62b

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