Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ec1bb3a2ef89bf2…

MALICIOUS

PDF

73.1 KB Created: 2021-02-14 22:57:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 1b4c8c7c13f11f2f1c3a61c73ba9d9bd SHA-1: cccfeb31e57cf24582e157e0666b951c98de5abe SHA-256: 7ec1bb3a2ef89bf2cbbd07c29ebacff360ca7c5eca4d36aff3ee571f04268ce3
184 Risk Score

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
  • 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 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=population+ecology+study+guide+answers In PDF document text
    • http://lubegow.iblogger.org/72373393174.pdfIn PDF document text
    • https://kedabivaj.weebly.com/uploads/1/3/1/4/131438143/tajonowa.pdfIn PDF document text
    • http://levantemosaic.com/bijexeneloshh79.pdfIn PDF document text
    • http://mobevusujezuno.22web.org/byomkesh_bakshi_stories_free.pdfIn PDF document text
    • http://indital.fun/28620171488ejkda.pdfIn PDF document text
    • http://shoppermarket.online/adding_and_subtracting_fractions_word_problems_grade_7sp2ya.pdfIn PDF document text
    • http://indonesia2health.online/92011613375wedgf.pdfIn PDF document text
    • http://picsonair.com/pubg_sensitivity_settingskwav4.pdfIn PDF document text
    • http://odebayitrafikhizmeti.com/338547203263pcik.pdfIn PDF document text
    • http://bosnoslovnoejelaniekupit.xyz/putudejemwhu5t.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://volomuladifute.rf.gd/98281407245.pdfIn PDF document text
    • http://jilovin.epizy.com/mathematical_lateral_thinking_puzzles_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/wifiduxezo/guidelines_for_antibiotic_use_in_primary_care.pdfIn PDF document text
    • http://sanemogoxidiwus.epizy.com/92296009920.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_off0000e143.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE143 5436 bytes
SHA-256: 4b53b41fa3e4c5eaa7ca1f8c53eec0e78f956d7bf7dedb3165cfdcd4792a5353
font_01_sfnt_off0000f3e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3E8 10428 bytes
SHA-256: a7a9e5667cdd94d1e0db8446356fc9f891aff2e81e8b10419ebe00ce9c71d34b