Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd0dfef47fe71004…

MALICIOUS

PDF

80.6 KB Created: 2021-03-03 18:23:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 1c43dbc8302fc2b87bc3efc693c5a4d1 SHA-1: 29dcb9bb6486187aab9b714bd168a378f7b763f1 SHA-256: dd0dfef47fe7100458333d05e2d5892b4aafd9da6b5e89c9357340e3c7aa8409
214 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains multiple embedded URLs pointing to known malicious redirectors and a link farm, indicating a phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly suggest malicious intent. While no scripts were directly extracted, the PDF structure and embedded links are indicative of exploitation techniques to redirect users to malicious sites.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://dafemum.ru/aws?utm_term=quadrafire+classic+bay+1200+auger+motor In PDF document text
    • https://cdn.sqhk.co/gederanew/xIgjji5/fiboko.pdfIn PDF document text
    • https://cdn.sqhk.co/jujuziwe/QhghfXX/car_racing_games_2019_free_play_online.pdfIn PDF document text
    • http://b2b-servis.ru/27279446716vc9dc.pdfIn PDF document text
    • http://christmas-gift.ru/cercle_de_la_forme_bd_magentafpyvp.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455876/normal_602c6ddf1a36f.pdfIn PDF document text
    • http://plusstore.pro/wajolugivepuvinif23ydl.pdfIn PDF document text
    • http://lovukexux.iblogger.org/77320801902.pdfIn PDF document text
    • https://lusimijibujadex.weebly.com/uploads/1/3/4/6/134677052/7c6084e72.pdfIn PDF document text
    • https://cdn.sqhk.co/jujirepak/djghg6P/vipub.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/zubata/lokexepafawodotupoxeg.pdfIn PDF document text
    • https://s3.amazonaws.com/bokofapig/letepaviki.pdfIn PDF document text
    • https://s3.amazonaws.com/dejazuvorira/building_permit_form_philippines.pdfIn PDF document text
    • http://xaveretirelepum.epizy.com/star_trek_beyond_streaming.pdfIn PDF document text
    • https://s3.amazonaws.com/gozifep/85806066976.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_off0000faf5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAF5 5972 bytes
SHA-256: 995def91ee63775b1f83e06606a5fff785c219ee45506d9821a4665551cf3bda
font_01_sfnt_off00010f3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F3E 11308 bytes
SHA-256: e32ba6c9905b71645a85b3695df99076914812255f7163eebb001d192869ef5a

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