Malicious PDF — malware analysis report

Static analysis result for SHA-256 045b1f1dface55ec…

MALICIOUS

PDF

79.6 KB Created: 2021-02-21 04:40:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 2a355c663bc7b9b404f521dc44432a2a SHA-1: e0cb1bea52590ed5a46482366f84508d0495f04f SHA-256: 045b1f1dface55ec95a012e82b8357a368f6f7d2c358e06ddac10042190fc73a
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a link to a known malicious redirector, which is designed to lead users to further malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded URL suggests a phishing or credential harvesting attempt disguised as educational content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://yafferge.ru/wix?keyword=campbell+biology+9th+edition+chapter+12+powerpoint In PDF document text
    • https://cdn-cms.f-static.net/uploads/4369626/normal_6027bc43859a9.pdfIn PDF document text
    • http://de-bewertung-id-q2e5t23.top/wigomimzlwug.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489428/normal_60318d37325ac.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410414/normal_5fd782d671200.pdfIn PDF document text
    • http://raicen.com/variable_costing_unit_product_cost_calculatorx65fw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446275/normal_602286198d974.pdfIn PDF document text
    • http://characduwe.space/348905328334106f.pdfIn PDF document text
    • http://businessoutsourcing.info/54927482094oth7o.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409627/normal_5fcdb71790fca.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403539/normal_5fee97d17261d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455183/normal_602ce4b1a63e6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415081/normal_600470f1eb444.pdfIn PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zesotat/dog_anatomy_bones.pdfIn PDF document text
    • https://s3.amazonaws.com/xuzakob/cell_organelles_worksheet_answer_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/pirofopafu/pipomifezujanugu.pdfIn PDF document text
    • https://s3.amazonaws.com/fixararololu/wevawajadewadamagamubi.pdfIn PDF document text
    • https://s3.amazonaws.com/dutuzanob/75866326251.pdfIn PDF document text
    • https://s3.amazonaws.com/dinigugaxej/74783744813.pdfIn PDF document text
    • https://s3.amazonaws.com/povelenavuviw/deed_of_assignment_of_debt_template.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_off0000efbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFBF 1636 bytes
SHA-256: 0a2e4d9274195423913154c8a7386442debaa5599bba726f837b993d3f048c68
font_01_sfnt_off0000f7ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7ED 5888 bytes
SHA-256: 422833157a938d54a59d92894bd92b182021b486ef82ce76767adeb63a582bd8
font_02_sfnt_off00010be0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BE0 10700 bytes
SHA-256: a373c023099dafabd0c9c0dff89ed385eaca97d6042fa535b03b1eaba5995f4f

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