Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e1d1ef74c5ea8e9…

MALICIOUS

PDF

64.6 KB Created: 2020-11-13 23:50:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: bb25db16884e899650a39572b298488f SHA-1: 718db33732aff85337a58e56578b4cdf121c4898 SHA-256: 5e1d1ef74c5ea8e93b88a8bf55058ef606ec42a200e15141962bce925749853c
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to other PDFs, suggesting a link farm or redirection mechanism. The primary URL, 'https://traffnew.ru/aws?utm_term=bajaj+allianz+claim+form+part+a', is likely a lure to download a malicious payload disguised as a claim form. ClamAV and ML classifiers also flagged this PDF as malicious, indicating a high likelihood of malicious intent.

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://traffnew.ru/aws?utm_term=bajaj+allianz+claim+form+part+a PDF link annotation
    • https://lotagixowila.weebly.com/uploads/1/3/1/1/131164100/wuwepuvupebukoxasaz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479688/normal_5fa9a5a66875c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372702/normal_5f888b9d71207.pdfIn PDF document text
    • https://favasebuwakule.weebly.com/uploads/1/3/4/3/134328846/8128950.pdfIn PDF document text
    • https://kadefetu.weebly.com/uploads/1/3/4/4/134471860/vazokadet.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370547/normal_5f8bcf1659c76.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388063/normal_5f8e61d444c61.pdfIn PDF document text
    • https://pefuxagofir.weebly.com/uploads/1/3/4/3/134359429/daxalubu-pedik.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391898/normal_5f9b1936a2d0a.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/gupuso/pajefizugexiretuzebapin.pdfIn PDF document text
    • https://s3.amazonaws.com/punurum/49687179173.pdfIn PDF document text
    • https://s3.amazonaws.com/xifabilejilab/papamojuw.pdfIn PDF document text
    • https://s3.amazonaws.com/vogubivajavofu/pufupuji.pdfIn PDF document text
    • https://s3.amazonaws.com/bevekizadoxuj/techos_verdes_y_jardines_verticales.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_off0000bec4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBEC4 5156 bytes
SHA-256: 97755329a95295f74cd34d89bc5f78abff5daa6277c32425711a056059d40b87
font_01_sfnt_off0000d049.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD049 10528 bytes
SHA-256: cb3b062d205d7c87c5aaf14fefa2751d0a57b0d0a7507b8a0777e4152060fd57

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