Malicious PDF — malware analysis report

Static analysis result for SHA-256 8167f4139e1989f4…

MALICIOUS

PDF

61.0 KB Created: 2020-12-20 20:11:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 879a2ff12840343d2341c8c31284e753 SHA-1: 75e3e066be1977afb01aae42a4b5788a0235487c SHA-256: 8167f4139e1989f4fb74be582ad4bbe72e8a6f9db79e30c9fd6bdc6e60208eba
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://traffking.ru/aws?utm_term=alter+ego+plus+a1+pdf+gratis'. This indicates the document's primary purpose is to lure the user to this malicious site. While no scripts were explicitly extracted, the nature of PDF redirects often involves embedded JavaScript to facilitate the redirection, hence the inclusion of T1059.007.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • 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.
  • 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://traffking.ru/aws?utm_term=alter+ego+plus+a1+pdf+gratis In PDF document text
    • https://mepafuxutare.weebly.com/uploads/1/3/4/6/134660934/6741250.pdfIn PDF document text
    • https://fosobezi.weebly.com/uploads/1/3/4/8/134898374/215714a7.pdfIn PDF document text
    • https://pitimonajavigo.weebly.com/uploads/1/3/1/3/131383860/xufuxunawizidu-pefuz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379987/normal_5fa5e11f1fbe4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489734/normal_5fba3f255bcfa.pdfIn PDF document text
    • https://jagevugabawe.weebly.com/uploads/1/3/4/6/134631244/ximuma.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fdc804350e6d73f00910ce2/t/5fdd22ff4bb64f0c604e8776/1608327935665/zuwodoxeg.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c113813-079d-458f-807e-5a0bc84257a1/jamivixedo.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc4f349e2fce462bca5d5b8/t/5fd05c9a125f6a657a4b52f2/1607490715380/smart_pulse_survey_app_download_2._6_version.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8b71c2b1-4dd2-44dd-bac7-40e2df28dfdd/radoluzazuvabokinivupor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/69af235c-fa90-4c9e-bbbb-79da84668c3c/black_hawk_middle_school_eagan_mn_home_page.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc3de39b-1418-4ac7-92eb-bd70b5c277fe/62790228489.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/86ec4703-79e5-484c-aceb-bec5f4301bc3/latokibovigadapubaw.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_off0000b283.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB283 5248 bytes
SHA-256: a9271c0b5c8b65cea8925ec07b084cec7d5a78c5a87018ba1d9ebb93e0943fa5
font_01_sfnt_off0000c477.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC477 10424 bytes
SHA-256: 88c311259346ebf0a62f8036a577c54d88e7d967a7a294dc302df1666405f4df

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