Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd8e3e24288c9c2b…

MALICIOUS

PDF

67.5 KB Created: 2021-02-22 14:53:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 1a7bbf75d9f152a09955d73e354e9991 SHA-1: 090c1a40248c64d261aaefdcd585895e51c5a38b SHA-256: bd8e3e24288c9c2bad4e473eef559b79597d3a8f65237dbe909d772bdc52c752
156 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a link farm and an embedded URI pointing to a suspicious domain. The document body, though partially corrupted, suggests a lure related to appliance repair. The presence of numerous external links, including one to a PDF hosted on AWS, indicates an attempt to distribute malicious content or redirect users to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://maypoin.ru/wb?keyword=kenmore%20ultra%20wash%20dishwasher%20model%20665%20won PDF link annotation
    • https://cdn.sqhk.co/xovinexesun/hgibwHd/7968562027.pdfIn PDF document text
    • https://cdn.sqhk.co/zudilubal/WLCAJns/itranslate_translator_dictionary.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469128/normal_5fe15cc971973.pdfIn PDF document text
    • https://cdn.sqhk.co/zezoxomop/bodhcYq/karugisimugikulupe.pdfIn PDF document text
    • https://rizomoxus.weebly.com/uploads/1/3/4/5/134589692/1683614.pdfIn PDF document text
    • https://cdn.sqhk.co/velabolo/cjjhi01/zodosatesewijexaxe.pdfIn PDF document text
    • https://nimukebobe.weebly.com/uploads/1/3/4/5/134527887/7348857.pdfIn PDF document text
    • https://bunojero.weebly.com/uploads/1/3/0/8/130874162/niput-kanijej.pdfIn PDF document text
    • https://cdn.sqhk.co/zowonefaso/Yiebij0/funny_disney_quotes_about_friendship.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/viboxikuz/xejobaxikugedakododa.pdfIn PDF document text
    • http://zeborerafo.rf.gd/que_es_un_pronombre_relativo_en_ingles.pdfIn PDF document text
    • https://s3.amazonaws.com/bagisi/31843984496.pdfIn PDF document text
    • https://s3.amazonaws.com/wekibik/sars_logbook_template_2018.pdfIn PDF document text
    • http://nepumunu.rf.gd/poradazapopap.pdfIn PDF document text
    • https://s3.amazonaws.com/sinamozagemoger/dynamite_results_bleacher_report.pdfIn PDF document text
    • https://s3.amazonaws.com/gajakelegeza/22502760926.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_off0000cbb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBB6 5436 bytes
SHA-256: 0f5a53fb2d3601284109e74458ce0c4485ed2395c79a4de1e3fb43772338c4cb
font_01_sfnt_off0000de24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE24 10176 bytes
SHA-256: 1407e9ad509613008423b29bffa1db0ebc4e31ef71d8e8f7a878cf6962ceb7e9

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