Malicious PDF — malware analysis report

Static analysis result for SHA-256 dab1ca587d80213b…

MALICIOUS

PDF

65.4 KB Created: 2020-12-09 15:40:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 9195f520f07894e2e0437893f0b8500e SHA-1: ec10b32318f0247464484a492ab877f6e89afc36 SHA-256: dab1ca587d80213b8ed7d9cbdd689f2d97b3dfa37b0ae7a71e97fd8d3c3736c9
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with a critical heuristic identifying a link farm designed to direct users to other PDFs. One of the primary URLs, 'https://traffset.ru/strik?utm_term=contabilidad+de+costos+pdf', is flagged as suspicious and likely serves as a landing page for phishing or malware. The ClamAV detection and ML classifier strongly indicate malicious intent, consistent with a phishing or trojan delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://traffset.ru/strik?utm_term=contabilidad+de+costos+pdf PDF link annotation
    • https://wigewowatabosaz.weebly.com/uploads/1/3/4/3/134352056/wozazozot-zixetejototerog-digaxamejosulot-pelebomotilo.pdfIn PDF document text
    • https://rijadotijijani.weebly.com/uploads/1/3/4/4/134470018/508d0e19f.pdfIn PDF document text
    • https://wowifowukanu.weebly.com/uploads/1/3/4/6/134634936/dajunejesofuj_bulas_rezada.pdfIn PDF document text
    • https://kevegojap.weebly.com/uploads/1/3/4/8/134863313/2913832.pdfIn PDF document text
    • https://fufirixosidewo.weebly.com/uploads/1/3/4/8/134868093/1f5361be.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/fatisake/88057583968.pdfIn PDF document text
    • https://s3.amazonaws.com/tudawufed/gnossienne_2_piano_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/tudawufed/dialog_semiconductor_plc_annual_report.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3edb5bce-b773-42f9-89f3-4e83844fe1dc/famejo.pdfIn PDF document text
    • https://s3.amazonaws.com/tabobujimo/47984442868.pdfIn PDF document text
    • https://s3.amazonaws.com/vezumobigodub/87862604687.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_off0000c2de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC2DE 5096 bytes
SHA-256: 2671792698f7b6b1142b92fc338eae7f7316ba82061621f2df0b930e7985b9c8
font_01_sfnt_off0000d43b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD43B 10864 bytes
SHA-256: ef15bf48f09e486f9fe6817371f325fc214d784cbb9d5792d0260b827c86d3b3

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