Malicious PDF — malware analysis report

Static analysis result for SHA-256 08aaddb11277e885…

MALICIOUS

PDF

75.5 KB Created: 2020-12-30 02:02:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 384b29d8fde41a8a6f218c2deaac8443 SHA-1: 29fb3c37658e26702ef34865d83b4ab12c9f3568 SHA-256: 08aaddb11277e88504983c78bfea430eb4e67bc1be79fea68df12725e7557c05
216 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1059.007 JavaScript

The PDF contains multiple heuristics indicating it is a phishing lure, specifically impersonating Walmart. It directs users to a redirector URL which then leads to a malicious PDF hosted on Weebly, likely to harvest credentials. The ML classifier and ClamAV detection strongly support the malicious nature of this file.

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
  • 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://bujopulima.weebly.com/uploads/1/3/3/9/133997272/2863503.pdf.
  • 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=order+contacts+online+walmart+canada PDF link annotation
    • https://bujopulima.weebly.com/uploads/1/3/3/9/133997272/2863503.pdfIn PDF document text
    • https://zisibunekotif.weebly.com/uploads/1/3/4/9/134902626/lukiboburugikod.pdfIn PDF document text
    • https://bapixive.weebly.com/uploads/1/3/4/3/134393773/wipijeziguxibil.pdfIn PDF document text
    • https://merokiniperoj.weebly.com/uploads/1/3/4/6/134691049/fugini.pdfIn PDF document text
    • https://kovumagamu.weebly.com/uploads/1/3/4/5/134578336/rifetoradil.pdfIn PDF document text
    • https://cdn.sqhk.co/xulawajikigi/icBJ4FC/36776113543.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385436/normal_5feb2bcae8c60.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/5baca5de-b902-4f8b-97e0-b5f2f1195f09/gumuvor.pdfIn PDF document text
    • https://s3.amazonaws.com/xulepiwa/gsma_intelligence_report_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/gupawupigawono/56375619195.pdfIn PDF document text
    • https://s3.amazonaws.com/bidemewufa/bless_the_broken_road_chords.pdfIn PDF document text
    • https://s3.amazonaws.com/remufuzu/41732703276.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_off0000e8f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8F9 5204 bytes
SHA-256: 689f7620a5becc3250d8a828302300adfa053cd215351cab8a23ea7850d59b4e
font_01_sfnt_off0000faa7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAA7 11212 bytes
SHA-256: dd0c221dc7d95148e960f6fcd36c0389cd9180acc407463693c49f02b563f074

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