Malicious PDF — malware analysis report

Static analysis result for SHA-256 b791b5d4a8e78bee…

MALICIOUS

PDF

69.8 KB Created: 2021-02-13 05:11:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 8ab9af1d2318c82ee1d264b78f520972 SHA-1: 10731443cfb850482457cdc2f073b9355b1efd6a SHA-256: b791b5d4a8e78beefeaf891985e7cf486b3f32fb43fcb39995a88e43f703ac09
244 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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.
  • 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.
  • 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://crophysi.ru/wix?keyword=26+inch+tv+walmart In PDF document text
    • https://cdn.sqhk.co/bugininaxi/J4Olig7/dubipudezusexijenemi.pdfIn PDF document text
    • http://qlemelest.online/reading_comprehension_exercises_lower_intermediate_studentslrr4n.pdfIn PDF document text
    • https://cdn.sqhk.co/dujepiwewi/jhiipja/jexak.pdfIn PDF document text
    • https://cdn.sqhk.co/josozudibud/ifFVMhi/24410879514.pdfIn PDF document text
    • https://cdn.sqhk.co/jigotove/4yjagjZ/29476161401.pdfIn PDF document text
    • https://cdn.sqhk.co/pobojatizopa/Rhff3gc/75125920089.pdfIn PDF document text
    • https://cdn.sqhk.co/tivuzofep/hlFmlha/tojitiri.pdfIn PDF document text
    • https://cdn.sqhk.co/pajokiman/buhanhe/61322731995.pdfIn PDF document text
    • http://nesobaka7.xyz/cbt_core_beliefs_worksheet7nb2j.pdfIn PDF document text
    • http://theporte.xyz/63642299813jrxpq.pdfIn PDF document text
    • https://xigokujote.weebly.com/uploads/1/3/4/6/134649591/9465285.pdfIn PDF document text
    • https://wivixovipi.weebly.com/uploads/1/3/4/4/134442696/8b88a7847b7.pdfIn PDF document text
    • https://cdn.sqhk.co/momujolo/Ghchbia/samsung_galaxy_note_20_ultra_wallpaper_4k.pdfIn PDF document text
    • http://erogan-oficial.site/accounting_interview_questions_and_answers_in_uaew43z7.pdfIn PDF document text
    • http://remontlegko.info/takagapodowesukowikewumepv2kod.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/ditiruz/90629411854.pdfIn PDF document text
    • https://s3.amazonaws.com/mexavofezoxi/astm_a105_standard_specification.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_off0000d53d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD53D 5204 bytes
SHA-256: b9b8ca4769182d312f2051c609c7523b775ba180cdeb276e56872ba4f99d9abb
font_01_sfnt_off0000e6de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6DE 10428 bytes
SHA-256: caa6ce9b4def43b3d80a44868bed8f4c3d63cdf88d7f6240020bfbf31241231a

Open this report in the interactive analyzer, or submit your own file for analysis.