Malicious PDF — malware analysis report

Static analysis result for SHA-256 66bdb75942fb3c7f…

MALICIOUS

PDF

73.6 KB Created: 2021-02-14 15:49:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 16b26219b4ca609919f388e63a8d10ac SHA-1: 077a51a966d6fa9fabc2ce75a94b730831e78539 SHA-256: 66bdb75942fb3c7f923e4087eed26e57982c5e95b71ed57d49acab9ff3f1e00f
164 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical PDF_SEO_LINK_FARM rule indicating a large number of external links, and ClamAV detected it as Pdf.Phishing.Trojan. The presence of urgency language in the document body further supports a phishing or malicious lure attempt. The file likely serves as a dropper or phishing page, directing users to external malicious resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 6

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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/aws?utm_term=blue+cross+nova+scotia+forms PDF link annotation
    • https://rodinesupogoj.weebly.com/uploads/1/3/1/3/131384539/6678064.pdfIn PDF document text
    • https://xutativapejan.weebly.com/uploads/1/3/4/5/134521393/67e78642d6f.pdfIn PDF document text
    • https://cdn.sqhk.co/tagisaxozof/jdFoZic/lego_star_wars_tfa_red_brick_codes.pdfIn PDF document text
    • https://motoburibekisi.weebly.com/uploads/1/3/4/6/134623685/777183.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384655/normal_6020638fe5fcc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403410/normal_5fdc4fdf852f6.pdfIn PDF document text
    • https://xukifunizagopo.weebly.com/uploads/1/3/4/0/134013279/gabases.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4498678/normal_5fc81ba531be8.pdfIn PDF document text
    • https://sofamilases.weebly.com/uploads/1/3/5/4/135401016/4737979.pdfIn PDF document text
    • https://cdn.sqhk.co/jesovolavig/cjcgfge/woodsmith_magazine_subscribe.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/bezegoluzose/video_from_twitter_online.pdfIn PDF document text
    • https://s3.amazonaws.com/kefodek/aspca_adoption_form.pdfIn PDF document text
    • https://s3.amazonaws.com/dixaleko/33530740805.pdfIn PDF document text
    • https://s3.amazonaws.com/gavobawum/cost_budget_management_template.pdfIn PDF document text
    • https://s3.amazonaws.com/dabatisew/cz_file_manager_mod_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/jidosatikim/deficiencia_de_carnitina.pdfIn PDF document text
    • https://s3.amazonaws.com/vasofirida/65104878317.pdfIn PDF document text
    • https://s3.amazonaws.com/bulolimepol/2338371389.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_off0000e492.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE492 5136 bytes
SHA-256: 892fcdc6bbf2627841cad712d5dda4d3cd5f843f70c8a5dd68383871e64e766b
font_01_sfnt_off0000f601.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF601 10356 bytes
SHA-256: 4f028e7c7016ea9491662761f847993b57bf191bd1cd91788df1c464c019e0a7

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