Malicious PDF — malware analysis report

Static analysis result for SHA-256 43320972bd62c2f4…

MALICIOUS

PDF

68.9 KB Created: 2021-05-08 06:42:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: d6507d047efe7aee17e2d4a903d01bda SHA-1: 13ab54443d6c7fdbd01e3f94c0657e53315a8978 SHA-256: 43320972bd62c2f4593a73eb33d8d0c24d9927a2e59e4ee28504a4374992a91b
242 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical finding for linking to known malicious redirector infrastructure. The document contains a large number of embedded URLs, many pointing to disposable hosting, suggesting a link farm designed to direct users to potentially harmful sites. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9001

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 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.
  • 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/strik?utm_term=kenmore+elite+smart+air+conditioner+manual In PDF document text
    • https://panikelixiguju.weebly.com/uploads/1/3/4/4/134478359/lokefadisema.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455403/normal_604ebc6de15f6.pdfIn PDF document text
    • https://vuderuxedus.weebly.com/uploads/1/3/4/6/134692959/3142283.pdfIn PDF document text
    • http://tiktokcopyrighthelpteam.com/what_is_the_book_the_spook_who_sat_by_the_door_aboutp9le1.pdfIn PDF document text
    • https://dejegudiferu.weebly.com/uploads/1/3/1/8/131857494/4726734.pdfIn PDF document text
    • http://wordwild-store.com/mitufatavaxufopabatass1co.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372707/normal_5fcf44363e224.pdfIn PDF document text
    • https://jefaganogebe.weebly.com/uploads/1/3/1/4/131437435/9373796.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426675/normal_605b77a4d53c3.pdfIn PDF document text
    • https://dowolozudatu.weebly.com/uploads/1/3/4/0/134000293/9791856.pdfIn PDF document text
    • https://zilakakazaxo.weebly.com/uploads/1/3/4/4/134442972/1709573.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408001/normal_5fcf212747856.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460466/normal_5fd94a83dd79d.pdfIn PDF document text
    • http://titanovyi-filtr.ru/what_are_the_rules_for_positive_and_negative_numberszxqcd.pdfIn PDF document text
    • https://dagakaxogofawi.weebly.com/uploads/1/3/4/6/134699425/xuziro-lakegoxedup-vajuwifuwepe.pdfIn PDF document text
    • http://mishabelle.ru/2125384328024hvf.pdfIn PDF document text
    • http://texno3ua.com/degegewanalufuboreberur63nz.pdfIn PDF document text
    • https://wilitixovin.weebly.com/uploads/1/3/4/3/134351513/3309177.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://doxesuxiweki.epizy.com/capitalism_and_industrial_revolution.pdfIn PDF document text
    • http://jigiwema.epizy.com/what_age_is_24_months.pdfIn PDF document text
    • http://bexuzovizapifar.rf.gd/carestation_650.pdfIn PDF document text
    • https://s3.amazonaws.com/tonisefoteka/gutinawovugilomevarum.pdfIn PDF document text
    • https://s3.amazonaws.com/nosepevozux/georgia_guidestones_address_for_gps.pdfIn PDF document text
    • https://s3.amazonaws.com/xovekolamoxe/fejosenuwijuniliwigex.pdfIn PDF document text
    • https://s3.amazonaws.com/sowirutelevolur/yelp_based_fact_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/pasutiz/brain_teasers_worksheet_answer_key.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000102e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102E1 5052 bytes
SHA-256: 4f628fea1a35f2a6f6f69e1bff8f7adf6c3a26a2bc723afa84a00f3123c142c1

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