Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8941772d9147eeb…

MALICIOUS

PDF

72.1 KB Created: 2020-12-15 05:44:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 527703bcc92b62f0221df35fc81cca48 SHA-1: 7f9a0dc1ac29416ff19ce78aad8dcf4f83ed8640 SHA-256: d8941772d9147eeb674941bad67c1db918e71e0fe6cab526ed2b8553951c9bf4
214 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many of which point to known malicious redirectors or link farms. The heuristic firings indicate the document is designed to redirect users to malicious infrastructure, likely for phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest an attempt to compromise users through malicious links.

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://traffine.ru/123?utm_term=berkshire+county+property+records In PDF document text
    • https://sixutaxujarupi.weebly.com/uploads/1/3/4/8/134882582/509043afb8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369916/normal_5f88c5b2d8f0e.pdfIn PDF document text
    • https://kapaboni.weebly.com/uploads/1/3/4/5/134597735/woposenewataw.pdfIn PDF document text
    • https://jikeberu.weebly.com/uploads/1/3/1/8/131857846/9e4ebd5.pdfIn PDF document text
    • https://norajinojo.weebly.com/uploads/1/3/4/3/134381333/dovager.pdfIn PDF document text
    • https://savakorudefipe.weebly.com/uploads/1/3/2/3/132303238/041e6b.pdfIn PDF document text
    • https://megadezatesaram.weebly.com/uploads/1/3/0/7/130776649/8051375.pdfIn PDF document text
    • https://fekukutetixamam.weebly.com/uploads/1/3/4/6/134636283/7527100.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://static1.squarespace.com/static/5fc726358651a0475196622d/t/5fc9501903adf92d9ca8879b/1607028763211/22461285494.pdfIn PDF document text
    • https://s3.amazonaws.com/pululusodogi/zeriw.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc6f6e56339345018512de0/t/5fd61927e5ac5828961986c9/1607866664392/sakuzufilaki.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc6598f2cf09257bd909251/t/5fc96523ab0d1a26d95ace8b/1607034148158/tawegurawaxodimixizatinif.pdfIn PDF document text
    • https://s3.amazonaws.com/mupakijivuruzim/area_code_601_canada.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0f05df9866f3fd2d48fd4/t/5fd02d4e281783041119b407/1607478609736/taking_off_fake_gel_nails_at_home.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc1ae0cab79f442f22f189a/t/5fc2a2d87acac6192a16cf18/1606591192837/32475920865.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0f05df9866f3fd2d48fd4/t/5fc590a5eaf37e3b645b6a46/1606783141419/61787599888.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_off0000ce47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE47 5016 bytes
SHA-256: 67503999c280778e33fb2b8141d8a5a50a1886ed62819eeb32d89944d1cd8acf
font_01_sfnt_off0000df54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF54 11176 bytes
SHA-256: 559cc620d75289d4ca7aed3bfaac1e807d85116287a0b6febf21b1e3edfc296f
font_02_sfnt_off00010585.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10585 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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