Malicious PDF — malware analysis report

Static analysis result for SHA-256 407d5fc3448272fd…

MALICIOUS

PDF

74.4 KB Created: 2021-03-28 13:46:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 7fd129c8c4c5c48ffc7075a7e198206c SHA-1: 54367bb704e9bd8af06bb49e3c32fede6d41def1 SHA-256: 407d5fc3448272fdff4618c32a1aa034fef646d45f0fcec4f36c952c31f03b43
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous external links, with one prominent URL pointing to a domain associated with potentially malicious content. The document body, though heavily obfuscated, appears to be a lure related to 'Di pasquale anabolic diet pdf', suggesting a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://xajibur.ru/123?utm_term=di+pasquale+anabolic+diet+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4471941/normal_601b578e61b48.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368245/normal_60057cfcb9aad.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421970/normal_5ff78fe3765be.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488582/normal_6024292276fd3.pdfIn PDF document text
    • http://nejuwenazi.iblogger.org/40452831141.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393208/normal_602d6f3d82241.pdfIn PDF document text
    • http://pelabinowoguk.getenjoyment.net/xezimivuvavaribewusaj.pdfIn PDF document text
    • http://zatodawu.iblogger.org/2005_dodge_caravan_owners_manual.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://roxegut.rf.gd/75748158367.pdfIn PDF document text
    • http://wotofuwib.epizy.com/39281503518.pdfIn PDF document text
    • https://s3.amazonaws.com/zarusegibitumet/medical_report_request_letter_template.pdfIn PDF document text
    • https://s3.amazonaws.com/xasovewipeje/software_testing_methods_and_techniques.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/567bc600-220c-41bb-adf4-72b46e45967c/general_chemistry_petrucci_10th_edition_solutions_manual_free.pdfIn PDF document text
    • http://kepinud.rf.gd/capitalization_and_punctuation_paragraph_worksheets_with_answers.pdfIn PDF document text
    • http://ziboporo.epizy.com/3222178299.pdfIn PDF document text
    • http://wazeniwemir.onlinewebshop.net/literary_devices_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/45b93f5e-b1a7-4dbf-b15d-8b080adbb786/wodogejaduwudilagejadani.pdfIn PDF document text
    • https://s3.amazonaws.com/baxadelefofibuz/poultry_diseases_in_urdu.pdfIn PDF document text
    • http://nifiloxoburufi.rf.gd/bavifisibes.pdfIn PDF document text
    • https://s3.amazonaws.com/xomudufe/marriage_contract_sample.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a649b3b0-6fcc-4296-82e9-7daa63498483/kodak_technical_pan.pdfIn PDF document text
    • http://lebelolejesupo.rf.gd/atomistique_cours_paces.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_off0000e5f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5F1 5316 bytes
SHA-256: cf293f1153504ab751f992be237969d5b76384d03436a967712222615f599518
font_01_sfnt_off0000f814.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF814 10716 bytes
SHA-256: 1265d59915928b4e18ecefd1363620868881c917e32e6fb0de389b2be749ee26

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