Malicious PDF — malware analysis report

Static analysis result for SHA-256 74c4ba53ed19d045…

MALICIOUS

PDF

69.5 KB Created: 2021-02-17 03:12:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: e2e5b844c9f13873673ccf00635786c1 SHA-1: 01ab443af9a4b6cb1cfc68b7040aecbf44e7f755 SHA-256: 74c4ba53ed19d0459fce98dfe60db2a4cbde7b8618d5042362ee1a0fcfdaf5c0
184 Risk Score

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 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=manual+vivitar+universal+remote+codes In PDF document text
    • http://steelsho3.club/89385978283h6m54.pdfIn PDF document text
    • https://cdn.sqhk.co/lirisakaxam/Kjhhg2T/lip_artery_lump.pdfIn PDF document text
    • http://wetebopoxegubu.iblogger.org/93682502696.pdfIn PDF document text
    • http://imedo.ru/42850982481qf4m1.pdfIn PDF document text
    • http://geosen.net/zurekabozoderf1n92.pdfIn PDF document text
    • https://livadekawa.weebly.com/uploads/1/3/5/3/135317457/80f715041.pdfIn PDF document text
    • https://cdn.sqhk.co/pulununese/5cHOggE/62476367664.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
    • http://zoxokukazo.epizy.com/10039715040.pdfIn PDF document text
    • https://s3.amazonaws.com/jevedijadiki/last_affair_full_movie.pdfIn PDF document text
    • http://fuwuwiri.rf.gd/dasizalegogadab.pdfIn PDF document text
    • http://sewekovekejir.epizy.com/prokaryotic_and_eukaryotic_cells_worksheet_middle_school.pdfIn PDF document text
    • https://s3.amazonaws.com/xafaxotaful/arabic_font_for_android_free.pdfIn PDF document text
    • https://s3.amazonaws.com/pesetufavo/68037160376.pdfIn PDF document text
    • http://gisonebabi.epizy.com/lysol_wipes_msds_sheets.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_off0000c741.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC741 5032 bytes
SHA-256: 777072863ce58d8dc23ede5f6653f9f0652e0dd40f3468b0d819fa92d8dceb35
font_01_sfnt_off0000d843.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD843 10140 bytes
SHA-256: 6545369201882c55caf105f9e2f9fce2dfedafb660f347bb009cd82ccf7f5770
font_02_sfnt_off0000faf3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAF3 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2