Malicious PDF — malware analysis report

Static analysis result for SHA-256 65657189b693646a…

MALICIOUS

PDF

63.6 KB Created: 2020-12-09 09:43:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 9eaa80a2f3e9d330bab8c0b794f5344d SHA-1: 15edf678e6fa7e8a20f1eca7daea09fa6e969ca4 SHA-256: 65657189b693646acb4cdc2dd99fa764df9283598d2bb4c8f5b7cdbd0a3db233
214 Risk Score

Malware Insights

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

The PDF file contains embedded links that redirect to a malicious domain, identified as a redirector and link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to lead the user to malicious content.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://gettraff.ru/123?utm_term=how+to+find+a+unit+vector+parallel+to+another+vector In PDF document text
    • https://wepugimi.weebly.com/uploads/1/3/1/0/131070973/7911743.pdfIn PDF document text
    • https://sifizebutu.weebly.com/uploads/1/3/0/8/130814914/64843dcb51c1b.pdfIn PDF document text
    • https://tavumake.weebly.com/uploads/1/3/2/7/132740551/5331218.pdfIn PDF document text
    • https://puzagetidorijes.weebly.com/uploads/1/3/4/4/134495880/4678076.pdfIn PDF document text
    • https://wekonopu.weebly.com/uploads/1/3/4/8/134848362/07ef994f7e2939.pdfIn PDF document text
    • https://bajewenizuku.weebly.com/uploads/1/3/4/4/134475359/4227c95e9.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/lupuvogotog/87068750040.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd0d3c00f7af3919d5a26f/1606225212817/grey_water_tank_rv.pdfIn PDF document text
    • https://s3.amazonaws.com/mubefula/57707358176.pdfIn PDF document text
    • https://s3.amazonaws.com/wulotugadag/evaluation_report_template_free.pdfIn PDF document text
    • https://s3.amazonaws.com/muvevanepen/53150426394.pdfIn PDF document text
    • https://s3.amazonaws.com/warapagefasovi/chemistry_notes_form_3_the_mole.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_off0000b7b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB7B9 5180 bytes
SHA-256: a62ee8938594772b7832c1395153562e5fd0461870dfd7070fa5e0c6e201413d
font_01_sfnt_off0000c966.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC966 11692 bytes
SHA-256: f86d821e0716078c1e83466eff09a16c8f3bee8fcf1a57241c739ba7c57b2f6e

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