Malicious PDF — malware analysis report

Static analysis result for SHA-256 47bc0357147c8438…

MALICIOUS

PDF

76.8 KB Created: 2021-01-15 12:46:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 159177d8392e616c2546d74e08350867 SHA-1: 7236ceb537eae8bface828c261d91ac772859531 SHA-256: 47bc0357147c843861983a055fb04d45a6777218c0ae8ed04193d26cd6f43861
214 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one identified as a malicious redirector. The ML classifier and ClamAV also flagged this file as malicious, indicating a phishing or malware distribution attempt. The presence of embedded links suggests an attempt to direct users to external, potentially harmful, websites.

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
  • 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/wb?keyword=mystic%20messenger%20zen%20route%20day%206%20chat%20times In PDF document text
    • https://static.s123-cdn-static.com/uploads/4367311/normal_5ff64f0cd3e13.pdfIn PDF document text
    • https://site-1176903.mozfiles.com/files/1176903/mad_truck_racing_mod_apk.pdfIn PDF document text
    • https://nevonanopovew.weebly.com/uploads/1/3/4/3/134335048/2801254.pdfIn PDF document text
    • https://cdn.sqhk.co/tipefimex/hi6hg9V/police_car_siren_soundboard.pdfIn PDF document text
    • https://zaximasuxudaris.weebly.com/uploads/1/3/4/5/134590642/5021634.pdfIn PDF document text
    • https://site-1168115.mozfiles.com/files/1168115/sherlock_holmes_movie_free_moviescounter.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/xoguwavosuje/library_administration_and_management.pdfIn PDF document text
    • https://s3.amazonaws.com/defujo/87695527012.pdfIn PDF document text
    • https://s3.amazonaws.com/kefiperizonofu/30553015624.pdfIn PDF document text
    • https://s3.amazonaws.com/wovitiku/self_guided_motorcycle_tours_of_ireland.pdfIn PDF document text
    • https://s3.amazonaws.com/zufojadibi/pimujizagizosuwewewur.pdfIn PDF document text
    • https://s3.amazonaws.com/genedonapubefe/28553107686.pdfIn PDF document text
    • https://s3.amazonaws.com/timeziso/fusionner_deux_documents_en_un.pdfIn PDF document text
    • https://s3.amazonaws.com/jirebonudur/31727796941.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_off0000ee30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE30 5632 bytes
SHA-256: 21006bfd2a82c8800bb8698903a49cde2cc42f0c8fda1e1dd33f27eb763c989b
font_01_sfnt_off00010147.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10147 10632 bytes
SHA-256: 73aeb8b07dfba81a4e475c2bc25016d0fe8e3ffc1ad2bc5ad4be533322f0b6c6

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