Malicious PDF — malware analysis report

Static analysis result for SHA-256 105477a7d32528cb…

MALICIOUS

PDF

63.8 KB Created: 2020-12-22 01:13:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: ffade56475376fe15e97156b6f456bfc SHA-1: 9ef6c9c43f058dbdff6705a77d79ca3cdb051016 SHA-256: 105477a7d32528cbdc6c37955c5621544e3e2e31fb5d3525db75506b988e1762
286 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1539 Steal Web Session Cookie T1056.004 Web Browser

This PDF file is identified as malicious by multiple heuristics and a machine learning classifier, including specific detections for credential phishing and MFA lures. The document impersonates PayPal, directing users to a redirector URL that ultimately leads to a disposable Weebly domain, likely to harvest sensitive information. The presence of numerous external links suggests a link farm intended to obscure the final malicious destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://wikabolodaj.weebly.com/uploads/1/3/4/6/134648749/guniza.pdf.
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • 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://traffnew.ru/strik?utm_term=lebara+top+up+code PDF link annotation
    • https://wikabolodaj.weebly.com/uploads/1/3/4/6/134648749/guniza.pdfIn PDF document text
    • https://katebobuwusa.weebly.com/uploads/1/3/1/3/131384636/visijizo.pdfIn PDF document text
    • https://wubinuju.weebly.com/uploads/1/3/4/6/134642725/d16e64f5a.pdfIn PDF document text
    • https://rixapozati.weebly.com/uploads/1/3/4/4/134456921/f9fa762eb3e3.pdfIn PDF document text
    • https://virubavu.weebly.com/uploads/1/3/4/7/134755547/dotexafexe-mobesurinofile-wakuti.pdfIn PDF document text
    • https://jitolubupiloz.weebly.com/uploads/1/3/4/6/134637312/5857271.pdfIn PDF document text
    • https://fakazurirogedim.weebly.com/uploads/1/3/4/7/134743668/sixuko.pdfIn PDF document text
    • https://wusafasugulub.weebly.com/uploads/1/3/4/5/134586051/1311865.pdfIn PDF document text
    • https://tanezogifa.weebly.com/uploads/1/3/4/3/134321065/juvovij.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/gavobawum/parking_management_system_project_report.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5bb0acd1e280355f54485/t/5fc8e1b5b74dd54858e40c79/1607000502084/fisowagurati.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/549188d6-ce9d-4369-b1bd-0162a9868c23/81649555568.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/da64fb73-c9da-4881-862e-64b132ee67e8/83337845916.pdfIn PDF document text
    • https://s3.amazonaws.com/mejifavo/blood_cancer_report_india.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_off0000be3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE3D 4940 bytes
SHA-256: 5e0ab586316282b9c0b7e17fa917dc1aa0a8e3df393ca91f137df77a2b553972
font_01_sfnt_off0000cf11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF11 10468 bytes
SHA-256: 2aeb801fd7a94109e377c3c5d91800345af16b00082f7908b100a3aee34f3fdd