Malicious PDF — malware analysis report

Static analysis result for SHA-256 84209e74dacbeb44…

MALICIOUS

PDF

72.5 KB Created: 2021-05-13 19:39:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 937d20aab57e2bad14ddb55e4e0ede8e SHA-1: f911bb10e69bcd3c77d20016828106c34a3dc173 SHA-256: 84209e74dacbeb441dd782e95d5b14b2329f444d7cfac01c4ad3caac267e4fbc
184 Risk Score

Malware Insights

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

This PDF file contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing campaign. The primary URL appears to be a lure related to a common technical support query. ClamAV and ML classifiers also flagged this file as malicious, specifically as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7853

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
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://vilenefex.ru/strik?utm_term=why+does+my+razer+headset+keep+beeping PDF link annotation
    • https://labifunuvi.weebly.com/uploads/1/3/4/8/134847398/guwozozudodorupare.pdfIn PDF document text
    • http://towufato.mywebcommunity.org/spanish_2_textbook_answers.pdfIn PDF document text
    • http://nosinoski.shop/sofewumezagadelipijugs08g.pdfIn PDF document text
    • http://about-central.com/75313527200lulb7.pdfIn PDF document text
    • https://podogavefa.weebly.com/uploads/1/3/1/4/131438056/5926345.pdfIn PDF document text
    • https://bigidogeto.weebly.com/uploads/1/3/0/8/130874652/5993643.pdfIn PDF document text
    • https://kijidagidopijub.weebly.com/uploads/1/3/0/7/130776406/5694238.pdfIn PDF document text
    • https://pabedowilopore.weebly.com/uploads/1/3/1/1/131163579/8997e6.pdfIn PDF document text
    • https://lisesadavageg.weebly.com/uploads/1/3/1/4/131438313/7701d92d8b0d.pdfIn PDF document text
    • http://raxawevamavox.getenjoyment.net/68119082227.pdfIn PDF document text
    • https://berajuvexoru.weebly.com/uploads/1/3/1/8/131860787/290563.pdfIn PDF document text
    • https://lolovegadagofi.weebly.com/uploads/1/3/1/6/131636941/8288984.pdfIn PDF document text
    • https://vaxamapex.weebly.com/uploads/1/3/4/0/134017084/f8643.pdfIn PDF document text
    • https://jevilorusijugif.weebly.com/uploads/1/3/0/8/130874204/9243728.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/91602a4b-4e76-4f3a-865f-6b37f56e81ef/mekadobowafebukuj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb28dc07-2632-44be-bf41-2174c7cf6b9f/36540316366.pdfIn PDF document text
    • http://kojenixerog.myartsonline.com/fafefuvepapedofipodetep.pdfIn PDF document text
    • https://7ae52be2-ba3c-41fb-8935-29281088223e.filesusr.com/ugd/affaa6_e90f145c4a1643a79b1ef74831f87566.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/b15d34d1-56f9-4ab8-beb1-a60d7e533718/duxepuxatasaxixexobi.pdfIn PDF document text
    • http://pawepeg.atwebpages.com/auditing_and_assurance_services_16th_edition_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7462fff7-06df-4e0e-8142-aa248f24b9c8/100_sat_words_list_answer_key.pdfIn PDF document text
    • https://81da36f4-dec6-4bf4-836b-19ed67500659.filesusr.com/ugd/5fd5c1_8d7d84ea910242a5923484ca60c76d7e.pdf?index=trueIn 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_off0001009c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1009C 5712 bytes
SHA-256: 1562822d0281e613de6044fbc1094ad533262467301181f5d83946388af987f5

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