Malicious PDF — malware analysis report

Static analysis result for SHA-256 0352c1fba5a738b8…

MALICIOUS

PDF

72.9 KB Created: 2021-02-27 02:56:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 32c736ceb44e37b887f89ac8c23aabb4 SHA-1: 26b20bc199655702697864c35a401075c1ebd552 SHA-256: 0352c1fba5a738b8075f9015b88814fff22d244d7436ea3f7c8e02a12746e5a5
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are structured as SEO spam or link farms, suggesting a malicious intent to drive traffic to potentially harmful sites. The ClamAV detection and ML classifier further support its malicious nature, classifying it as a phishing trojan. While no scripts were explicitly extracted, the PDF structure and embedded URIs indicate a phishing or SEO spam attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://gimoguvi.ru/wb?keyword=dymo%20letratag%20not%20printing%20text PDF link annotation
    • https://cdn.sqhk.co/kosenopelid/wifOybr/camerafi_live_facebook.pdfIn PDF document text
    • https://zanobevaduj.weebly.com/uploads/1/3/2/6/132682049/4925ea0c1553edc.pdfIn PDF document text
    • https://cdn.sqhk.co/bepifopid/Cmtfpgd/minecraft_pe_mod_menu_2018.pdfIn PDF document text
    • https://dopapebo.weebly.com/uploads/1/3/4/8/134870178/wajisazokafe.pdfIn PDF document text
    • http://xurixekan.22web.org/jetenitodifokukasi.pdfIn PDF document text
    • https://sunanineriputa.weebly.com/uploads/1/3/2/7/132740954/8584715.pdfIn PDF document text
    • https://cdn.sqhk.co/medugagoviji/gfOxge3/follower_analyzer_for_instagram_online.pdfIn PDF document text
    • https://dajidavibaral.weebly.com/uploads/1/3/4/6/134606929/gonipadupuke.pdfIn PDF document text
    • https://xalovediluf.weebly.com/uploads/1/3/1/3/131380345/b0a87f608.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/mejigavukolu/33003187624.pdfIn PDF document text
    • http://gijuvaginitawaz.epizy.com/88344346381.pdfIn PDF document text
    • http://palalujopaxuv.epizy.com/22533874594.pdfIn PDF document text
    • https://s3.amazonaws.com/gateme/itc_audit_report_2019.pdfIn PDF document text
    • http://pixelub.rf.gd/gasewemutokidavibosas.pdfIn PDF document text
    • https://s3.amazonaws.com/xozeb/wemewukiponorupe.pdfIn PDF document text
    • http://sosesejuwukoga.epizy.com/pc_building_simulator_steam_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/defujo/how_many_types_of_appeals_are_there.pdfIn PDF document text
    • https://s3.amazonaws.com/farowug/gewujigupariwuxaziz.pdfIn PDF document text
    • https://s3.amazonaws.com/sisaxu/kesiwoje.pdfIn PDF document text
    • https://s3.amazonaws.com/likerajatob/meilleur_application_android_accordeur_guitare.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_off0000e221.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE221 5132 bytes
SHA-256: 334bc8e8fde575e9acb0ad7413f2e1593a912478fdcedc3df5d41d0f97a9da60
font_01_sfnt_off0000f398.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF398 10268 bytes
SHA-256: 72fcea9b98ce600d2db81b093a264f0bfd8c8be3c5fbee380fa753872b63a88d

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