Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3a27000afc73a04…

MALICIOUS

PDF

68.3 KB Created: 2021-02-13 15:27:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 7a49e67a70e31b34ccb976cec9aa26e1 SHA-1: e8d3a7a88029bf6a19389eb14d0171b927b4c96c SHA-256: f3a27000afc73a04075c27a3ecca6066db11f4e7a1b80572b2f2c34a1b86cdc7
226 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF document exhibits characteristics of a phishing lure, specifically referencing 'Capital One' and 'savings' to deceive the user. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to distribute malicious content or redirect to phishing sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely involving the exploitation of PDF vulnerabilities to execute a payload or redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise 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
  • 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://druttle.ru/123?utm_term=capital+one+refer+a+friend+360+savings PDF link annotation
    • https://lokejefu.weebly.com/uploads/1/3/5/3/135301848/sodirajisasuj.pdfIn PDF document text
    • https://zoveponezewuda.weebly.com/uploads/1/3/0/7/130738822/xipikidajowuxunuw.pdfIn PDF document text
    • https://cdn.sqhk.co/mafokesaxuvi/VYL6xQV/42474707880.pdfIn PDF document text
    • https://bifukedupojuxi.weebly.com/uploads/1/3/4/4/134498794/nowowekine.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379380/normal_6025a6cd2b886.pdfIn PDF document text
    • https://likunemotiro.weebly.com/uploads/1/3/5/2/135299998/412a829.pdfIn PDF document text
    • http://nakomajuvedina.iblogger.org/88383482751.pdfIn PDF document text
    • https://kadorupadidugi.weebly.com/uploads/1/3/1/6/131636929/b5877321.pdfIn PDF document text
    • https://cdn.sqhk.co/dajebala/Jejcfsh/ninda_sheebah_mp4_download.pdfIn PDF document text
    • https://pujuwofox.weebly.com/uploads/1/3/4/8/134882524/5823065.pdfIn PDF document text
    • https://kolokizegilo.weebly.com/uploads/1/3/4/3/134370221/663503.pdfIn PDF document text
    • http://wavolat.iblogger.org/2861310548.pdfIn PDF document text
    • https://ridoduna.weebly.com/uploads/1/3/4/5/134528127/1459979.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xawiponifazu.epizy.com/messenger_app_latest_version_2019.pdfIn PDF document text
    • http://tenedurexijipes.epizy.com/aggiornamento_android_asus_zenfone_2.pdfIn PDF document text
    • http://masusekokuberex.rf.gd/sue_former_employer_for_breach_of_contract.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_off0000cda2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDA2 5632 bytes
SHA-256: 5c5c127dcdee659717f2c37f73fe8ff0592cf0b1e19c7ed3fd7f6ee30b8f47de
font_01_sfnt_off0000e0d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0D6 10416 bytes
SHA-256: b660104a68740296be46ae2132cb0cb1348ece6d7b10ca252ede782ceafb9917

Open this report in the interactive analyzer, or submit your own file for analysis.