Malicious PDF — malware analysis report

Static analysis result for SHA-256 04e2b2683df70eae…

MALICIOUS

PDF

72.4 KB Created: 2020-11-24 20:46:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: c888ee47d84afaf7f90bc3d743c64b73 SHA-1: db61e3c9c35c438c6b02531378c500da4f500ad7 SHA-256: 04e2b2683df70eaeb983570a9625a12a139178a883129300126495ddc7323bdc
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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.
  • 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://traffine.ru/123?utm_term=the+rest+of+us+just+live+here+chapter+1+summary PDF link annotation
    • https://menedusuwoguv.weebly.com/uploads/1/3/4/6/134699995/xisovi-luxajonapudo-goviloxuk.pdfIn PDF document text
    • https://kikuvabafot.weebly.com/uploads/1/3/4/3/134332304/gudil-fikisixunof.pdfIn PDF document text
    • https://lebotisoko.weebly.com/uploads/1/3/4/5/134597635/dijokatuvaji.pdfIn PDF document text
    • https://zimiduninu.weebly.com/uploads/1/3/1/6/131637103/jakadomabutot_limufawidivaw_zalowabi_dubukikowavoti.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/murudute/36508560471.pdfIn PDF document text
    • https://s3.amazonaws.com/xakajoziwibi/62982787718.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/02896106-8952-4a6c-9c9a-365dcdf2151a/fenawojelepoxukaboxaboku.pdfIn PDF document text
    • https://s3.amazonaws.com/gavapozalilup/89408956206.pdfIn PDF document text
    • https://s3.amazonaws.com/rurovikejigibu/android_apps_on_chromebook_2018.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3bce0d09-689c-417b-a5f3-38af332a438e/genes_and_chromosomes_mutation_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/nerugiraxura/intrusion_detection_system_report.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_off0000dd61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD61 5492 bytes
SHA-256: 168aa62c577cf17f1e9063766a56a90701449a8f6a7b57074f602a708c9936b6
font_01_sfnt_off0000f004.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF004 11056 bytes
SHA-256: 6445ff089ff1ef3d7fbd15979fd895b35dac9d967de2478f0fd436760f441a6c