Malicious PDF — malware analysis report

Static analysis result for SHA-256 45e9643a415402f0…

MALICIOUS

PDF

73.4 KB Created: 2020-12-11 04:12:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 52b334f22cdefe41ec5d6660f29f6d9b SHA-1: 50cfce615f7876c031ad63ee84a0bce6bd166315 SHA-256: 45e9643a415402f0c13891bdf137b24e2e1ee6ef19908d2e627f2ae41a77deda
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged as malicious by multiple heuristics, including a critical ClamAV detection and an ML classifier. It contains numerous external links, with a significant number pointing to a link farm, suggesting a phishing or SEO poisoning attack. The presence of embedded URLs and the overall structure indicate an attempt to redirect users to malicious websites.

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
  • 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.
  • 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://traffine.ru/aws?utm_term=cozy+house+bamboo+sheets PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4404503/normal_5faf0bad452ae.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4423195/normal_5fcf82cbab6df.pdfIn PDF document text
    • https://dopotalufiru.weebly.com/uploads/1/3/4/6/134601398/c31b0d7f7f7607.pdfIn PDF document text
    • https://xajadigosulibab.weebly.com/uploads/1/3/4/6/134650053/0d55230b90.pdfIn PDF document text
    • https://zomusabizexeko.weebly.com/uploads/1/3/4/3/134317177/zifurowujimanod.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/5fc0e526c6229360ecacefcf/t/5fc606fa61e25426e106d384/1606813434937/deforest_high_school_athletics.pdfIn PDF document text
    • https://s3.amazonaws.com/xapijifas/whatsapp_web_for_windows_10_pro.pdfIn PDF document text
    • https://s3.amazonaws.com/pegebunov/affine-_transformation_parameters_regression_for_face_alignment.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2eb45214-3c02-44bd-8cde-2013e050a3a4/7751780886.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc6bf6a8b9e860b7b1c590b/t/5fd072245ec17a4c6691a63d/1607496228978/pub_quizzes_general_knowledge_free.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc4bfa2bd14ff0dd2b5522a/t/5fc742e65060c93fcd7a6cf8/1606894311134/europe_empire_2027_hacked_apk.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc2a60b1c8c7413143d24fc/t/5fc3871f3c6ccf69f3cbcb61/1606649631858/bomusutugekabug.pdfIn PDF document text
    • https://s3.amazonaws.com/zepifudoxapo/best_reader_for.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc779470d716e027b043af0/t/5fcf75d568c18617d412daa5/1607431638186/67892079142.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_off0000e275.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE275 4996 bytes
SHA-256: 7069b729f9b27e45f09f0a2b743a408436c2fbac9dddd7dda313bfec8837ce37
font_01_sfnt_off0000f359.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF359 11280 bytes
SHA-256: ae2a886c89a345329b8ffc8f0e7b7d87e8f284a445cd205cc2a851c40a92db8a

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