Malicious PDF — malware analysis report

Static analysis result for SHA-256 7324daf326d824d9…

MALICIOUS

PDF

73.6 KB Created: 2021-01-31 20:28:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 3887566a7336c3c537b551550713a8bd SHA-1: f7acfed03e7e9b782e3804f362f8c47f599df2dd SHA-256: 7324daf326d824d939108e668dec38a1984becb6db3a1f9e248821d9940eff6f
214 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, including a known malicious redirector and a link farm, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The document body, though corrupted, suggests a lure related to an 'oral presentation feedback form template'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://crophysi.ru/aws?utm_term=oral+presentation+feedback+form+template In PDF document text
    • https://cdn.sqhk.co/nuwezomu/cihiqOQ/96841692902.pdfIn PDF document text
    • https://wujipiledulom.weebly.com/uploads/1/3/4/6/134695719/616664c2da.pdfIn PDF document text
    • https://wovitinukid.weebly.com/uploads/1/3/4/3/134372120/bizizavubesaterap.pdfIn PDF document text
    • https://motanaweda.weebly.com/uploads/1/3/4/3/134316912/31657584.pdfIn PDF document text
    • http://lojotiwutorolad.22web.org/gedut.pdfIn PDF document text
    • https://cdn.sqhk.co/rujosupatebu/ejc9zhh/video_call_horror_cartoon_cat_liver.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/faduxodiwo/49388093303.pdfIn PDF document text
    • http://xowevabi.epizy.com/telugu_movies_tamil_dubbed.pdfIn PDF document text
    • https://s3.amazonaws.com/tevigotu/71700283841.pdfIn PDF document text
    • http://ziwivalotezeti.rf.gd/html_template_dashboard.pdfIn PDF document text
    • https://s3.amazonaws.com/megodipewukitoj/tusapifate.pdfIn PDF document text
    • https://s3.amazonaws.com/pasawexawinogad/butivavijuvuxiz.pdfIn PDF document text
    • http://getidevip.epizy.com/23594148130.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d761.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD761 5320 bytes
SHA-256: 7dd4fc9270d9f070a107e169660cb1b189c356730f22db3352df20decbc50919
font_01_sfnt_off0000e953.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE953 9916 bytes
SHA-256: cd12aec2ff703f3b0b451690306e4d716b78f5a64cc300456d3799d6aaa7a140
font_02_sfnt_off00010b27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B27 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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