Malicious PDF — malware analysis report

Static analysis result for SHA-256 e284a5a175a7d76e…

MALICIOUS

PDF

64.7 KB Created: 2020-11-27 07:01:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 2246c9acbe811fb0444aee99a4c0c5b9 SHA-1: 266332f096a3db1068e579b67ce6cc0d09d93914 SHA-256: e284a5a175a7d76efc4026f493afb2bc93b4297c9402fba9901561283d7697fe
222 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The sample is a PDF document flagged by multiple heuristics as malicious, including ML classification and ClamAV detection. It impersonates American Express to lure users into clicking a link, identified as a credential phishing attempt. The embedded URL leads to a known malicious redirector, which likely serves as a delivery mechanism for a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://jarapitoxedomel.weebly.com/uploads/1/3/1/4/131437170/mizeza_korila_woxalumo.pdf.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://cctraff.ru/strik?utm_term=d%2526d+gemstone+weight In PDF document text
    • https://jarapitoxedomel.weebly.com/uploads/1/3/1/4/131437170/mizeza_korila_woxalumo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402724/normal_5fb000816fdbc.pdfIn PDF document text
    • https://puwexisafiza.weebly.com/uploads/1/3/4/5/134586360/551d2747f.pdfIn PDF document text
    • https://zavomori.weebly.com/uploads/1/3/4/3/134335150/mijukozotam_lobepoko_motujudew.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463526/normal_5fc04f20ad442.pdfIn PDF document text
    • https://jevamupoledi.weebly.com/uploads/1/3/4/7/134712268/lawuzan.pdfIn PDF document text
    • https://rigagebefizo.weebly.com/uploads/1/3/4/6/134631069/zojobojowarabili.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366028/normal_5f8a66707aaee.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/povodijirig/how_to_get_rid_of_roof_rats_outside.pdfIn PDF document text
    • https://s3.amazonaws.com/muvarelo/constitution_handbook_guided_reading_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/vonusirukete/marinadukogaligule.pdfIn PDF document text
    • https://s3.amazonaws.com/sezebepit/35642818437.pdfIn PDF document text
    • https://s3.amazonaws.com/zewavidopexebi/dj_felli_fel_finer_things.pdfIn PDF document text
    • https://s3.amazonaws.com/pojojagajevuxa/clifton_davidson_attorney.pdfIn PDF document text
    • https://s3.amazonaws.com/kawotexulozax/othello_final_test_answers.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_off0000c5dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5DC 4156 bytes
SHA-256: 5bcf7f318894cd8667f709bf970fa8c582a8027402ea75fdf14ac0e15260a4d2
font_01_sfnt_off0000d40a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD40A 10100 bytes
SHA-256: 103b76ae3ade9bb4a1554e1e2fdc2f5bc5462be601660caf5bc2260d7ae123ff

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