Malicious PDF — malware analysis report

Static analysis result for SHA-256 35809019e94433fd…

MALICIOUS

PDF

65.2 KB Created: 2021-02-24 03:42:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 13b525027a50181ee283e9c473f27afa SHA-1: 913b953260a0a7168ea305e50eb085900253afeb SHA-256: 35809019e94433fd06d6d27193ce069c175c90ad8e74c9657fd55cc761331d47
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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=lillebaby+airflow+instruction+manual In PDF document text
    • https://cdn.sqhk.co/ranetixeba/h6KgeJ4/66478462741.pdfIn PDF document text
    • https://cdn.sqhk.co/gewanunu/gjbYgfS/tiktok_followers_no_human_verification_or_survey_2020.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475203/normal_602f9af221103.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4468554/normal_5ff7aacb10851.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393639/normal_602b8fcde96a1.pdfIn PDF document text
    • https://cdn.sqhk.co/bomumuxa/ejerWYe/medieval_war_horse_armor.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466367/normal_6025455f210ae.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369643/normal_602071333f899.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379964/normal_6035338b439fb.pdfIn PDF document text
    • https://cdn.sqhk.co/lewivapawo/fXXgcPc/13161599365.pdfIn PDF document text
    • http://gofimowekes.66ghz.com/26825741017.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375073/normal_5fd87fa69e383.pdfIn PDF document text
    • http://nigamenivikuki.iblogger.org/megisexevololil.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4504554/normal_600dfed2ac2a6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383156/normal_5fceb4f452cfe.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/bejenosugede/61864766542.pdfIn PDF document text
    • http://nebobabag.rf.gd/tuxunoxakidoropobofusepev.pdfIn PDF document text
    • https://s3.amazonaws.com/bojafazes/pegunukasosofa.pdfIn PDF document text
    • http://bakenexiradofo.epizy.com/41154328084.pdfIn PDF document text
    • http://nubirenewukuz.rf.gd/veeder_root_not_printing.pdfIn PDF document text
    • http://mepolubigujume.rf.gd/argument_essay_outline_template.pdfIn PDF document text
    • http://budekibume.epizy.com/american_megatrends_bios_beep_codes.pdfIn PDF document text
    • http://mapexas.epizy.com/sovifidupoxoxulivonexino.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_off0000c361.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC361 5304 bytes
SHA-256: 095f6813e195168295b198133855f765ea292acb3c7dc68299a112d9ac24001d
font_01_sfnt_off0000d572.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD572 9880 bytes
SHA-256: 5b8ed6a1e0ce3be580e4f230560f14072dbdf1efa13d979c0a5a6607184c6908

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