Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c46147c76a5af45…

MALICIOUS

PDF

81.8 KB Created: 2021-03-23 04:53:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: c04e504f2eb0507ff26464bf8e1f5041 SHA-1: 0d81a32e8eeb77bcf31904377d6991472e71ac8c SHA-256: 2c46147c76a5af458bedb2c00ad98f3f134139a414b43161eee7bed9740cf52a
126 Risk Score

Malware Insights

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

The PDF file contains numerous external URIs, many of which point to disposable hosting and are part of a link farm, indicating a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a phishing lure designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://zajinet.ru/strik?utm_term=presto+deep+fryer+06006+manual PDF link annotation
    • http://ru-1.casa/electronic_battleship_advanced_mission_replacement_pieceswszle.pdfIn PDF document text
    • http://oneitstore.info/tezumelivupixekadpvy.pdfIn PDF document text
    • http://xenuven.22web.org/gobop.pdfIn PDF document text
    • https://definifizuzum.weebly.com/uploads/1/3/4/7/134759181/0f2be10387667.pdfIn PDF document text
    • http://vir-tus.com/kathy_rain_ios_walkthrough5nzcx.pdfIn PDF document text
    • http://de-bewertung-id2842384.icu/pedagogy_urdu_book2w6tu.pdfIn PDF document text
    • http://belkwigs.com/sotujaronafesoe92e9.pdfIn PDF document text
    • http://blablablacar.online/what_does_typography_mean_in_poetry9tp7c.pdfIn PDF document text
    • https://joworuzofoluj.weebly.com/uploads/1/3/2/6/132683209/zejisoso.pdfIn PDF document text
    • https://wewebaviwipi.weebly.com/uploads/1/3/0/7/130775561/vuvaturajilubamidep.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485451/normal_602bb15dbcb2c.pdfIn PDF document text
    • http://nemogaguwexero.iblogger.org/171015227.pdfIn PDF document text
    • http://sovetnik53.ru/strategic_marketing_books_freeyu4ox.pdfIn PDF document text
    • https://saxeguwub.weebly.com/uploads/1/3/1/4/131406831/4257314.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378160/normal_5fdbdc9d89ab3.pdfIn PDF document text
    • http://fb-pageunderreview.com/refoxowivofutalubewebejob9ubbs.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/wegemebufojafak/20637357037.pdfIn PDF document text
    • http://tasetexogop.epizy.com/subway_menu_specials_trinidad.pdfIn PDF document text
    • http://fikikozazilut.rf.gd/sinixexivuzi.pdfIn PDF document text
    • http://mepusafufeja.rf.gd/cub_scouts_outdoor_code_game.pdfIn PDF document text
    • https://s3.amazonaws.com/kufazete/4515752482.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_off000100d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100D7 5584 bytes
SHA-256: cc421a0a7f9c41416f87047d5a1545c15d12c70309fa24fba04dc7fc52723c41
font_01_sfnt_off000113c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113C5 10604 bytes
SHA-256: 2d3859c29127301da6b433b30fbb320590f2d3e4685326950cfff4a37e78a74c

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