Malicious PDF — malware analysis report

Static analysis result for SHA-256 20cd8959bb5d2950…

MALICIOUS

PDF

85.3 KB Created: 2021-04-26 16:20:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 567f5cd99b3a78fd41f8687c2e2556f8 SHA-1: 1156c75ac096007fcff099a4d3b5d3b3b4a464f4 SHA-256: 20cd8959bb5d2950782c28b351bb70de515cb86e30c035f3d6e31607dd8672ce
156 Risk Score

Malware Insights

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

The sample was flagged by multiple heuristics, including PDF_SEO_LINK_FARM and ML_NYX_PDF_MALICIOUS, indicating a high likelihood of malicious intent. The embedded URLs and the PDF structure suggest an attempt to redirect users to external sites, potentially for phishing or distributing further malware. No scripts were extracted, but the PDF itself contains numerous links.

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 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://ponafet.ru/strik?utm_term=are+wild+rats+dangerous+to+dogs PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4385863/normal_5fceea91e460d.pdfIn PDF document text
    • http://botakezan.iblogger.org/gamupim.pdfIn PDF document text
    • https://sesuwulot.weebly.com/uploads/1/3/1/4/131438847/jadutedajenewopet.pdfIn PDF document text
    • https://cdn.sqhk.co/nobixapo/hhwgfrk/how_do_i_know_my_etisalat_number_egypt.pdfIn PDF document text
    • https://cdn.sqhk.co/viwiratoposu/jdigRy3/24495989482.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486548/normal_600fbd6c27a12.pdfIn PDF document text
    • http://dorisebadun.22web.org/newborn_jaundice.pdfIn PDF document text
    • https://cdn.sqhk.co/melobokodijo/gejhctp/zelexufemekigomigarexef.pdfIn PDF document text
    • https://viluvaxev.weebly.com/uploads/1/3/5/9/135974466/wigajasaregixezixa.pdfIn PDF document text
    • https://cdn.sqhk.co/tajavujexiz/vgiTyhf/holy_city_brewing_farmers_market.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373788/normal_5fdbfd3b00c6e.pdfIn PDF document text
    • https://gixebodaloru.weebly.com/uploads/1/3/1/3/131379223/lutikutawuxifi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/sefabe/tefuvezevutifodi.pdfIn PDF document text
    • http://wasokutuv.epizy.com/what_are_the_3_types_of_digital_media.pdfIn PDF document text
    • https://s3.amazonaws.com/jivuxo/wedunepasugitibegerimo.pdfIn PDF document text
    • https://s3.amazonaws.com/fulosobezur/istikhara_dua_meaning_in_malayalam.pdfIn PDF document text
    • http://patikogoxuxit.epizy.com/vifosawazuredukofif.pdfIn PDF document text
    • https://s3.amazonaws.com/purawuma/99449567615.pdfIn PDF document text
    • https://s3.amazonaws.com/goveruduzewoxu/charoen_pokphand_group_financial_report.pdfIn PDF document text
    • http://sudemididesiz.epizy.com/zitadukamexuxogo.pdfIn PDF document text
    • http://xovijoj.epizy.com/74809086575.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001038d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1038D 4956 bytes
SHA-256: cbf967dc1fb3675794796579248d6e6ed435d3ffcfd7f63c4bdcbf1460009743
font_01_sfnt_off00011480.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11480 10836 bytes
SHA-256: 9146fc8c9256bb49b680cc275e6d570489c2d6a7215807956728928cadcacf0f
font_02_sfnt_off0001399c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1399C 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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