Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae74ffa6daf4a619…

MALICIOUS

PDF

81.3 KB Created: 2021-02-28 04:09:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: a731bd1272c3e20d3b66f5901517348a SHA-1: 2a4ee0a8de75536528e3e4386648c53869436e2e SHA-256: ae74ffa6daf4a6191f587a76834ed6334e6ca7800e62791d56419da68fb271d5
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The sample was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs, with at least one pointing to a link farm on disposable hosting, suggesting a phishing or malware distribution scheme. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of techniques used to redirect users to malicious sites.

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://baarspo.ru/strik?utm_term=what+is+digital+zoom+in+photography PDF link annotation
    • http://jodefugivu.22web.org/sample_medical_school_letter_of_recommendation_template.pdfIn PDF document text
    • https://lumixomenuvaw.weebly.com/uploads/1/3/4/7/134745504/7660420.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452626/normal_5ffeedb24dab2.pdfIn PDF document text
    • https://zexaloguf.weebly.com/uploads/1/3/4/5/134576330/4713035.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420604/normal_5fcb971ad999a.pdfIn PDF document text
    • http://xekuluw.iblogger.org/maluvawewuzinuxev.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454677/normal_5fd305e725bb5.pdfIn PDF document text
    • http://tezosomebapixim.22web.org/tinkle_comic_books.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4461484/normal_5fff021a9e0cd.pdfIn PDF document text
    • http://pimegaxonubaz.22web.org/hoover_windtunnel_vacuum_attachments.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496582/normal_600366e953468.pdfIn PDF document text
    • https://noruwapawufibem.weebly.com/uploads/1/3/0/9/130969999/33dcc.pdfIn PDF document text
    • http://watenaz.iblogger.org/finding_slope_worksheet.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zasegusof.epizy.com/subtracting_fractions_and_mixed_numbers_worksheet.pdfIn PDF document text
    • http://nigowona.rf.gd/bizukulizijixe.pdfIn PDF document text
    • http://zarusorujot.epizy.com/human_development_report_2017_undp.pdfIn PDF document text
    • https://s3.amazonaws.com/nufidibodudulad/gamesir_z1_android.pdfIn PDF document text
    • https://s3.amazonaws.com/xidulumexi/mid_heel_platform_shoes_for_ladies.pdfIn PDF document text
    • http://dejamatokato.rf.gd/cadsofttools._com_to_dwg.pdfIn PDF document text
    • https://s3.amazonaws.com/jezobasit/65575906062.pdfIn PDF document text
    • https://s3.amazonaws.com/zuguvoxoki/free_printable_contraction_worksheets_for_second_grade.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fe88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE88 5536 bytes
SHA-256: 2c9e703edd39d1fca13dd852cef827bfb73d4bc49771c2582a2c5f2fcd4d2a80
font_01_sfnt_off0001114b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1114B 11360 bytes
SHA-256: eed49eefa95d79395128bd271f6d9817fd601e781813df119ac3bcd49eca564b

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