Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd09d1fc543cd7e8…

MALICIOUS

PDF

91.9 KB Created: 2021-02-22 21:10:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 1b20b49852327a078dc8ef7a042f5338 SHA-1: db9521fa06c36785f59bb9ae7c869d82ed352a7f SHA-256: dd09d1fc543cd7e846d5174920144dc7afdf29a24acaddf487f6feb6512354e1
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://seumenha.ru/123?utm_term=can+alexa+work+with+roku+tv PDF link annotation
    • https://ribupawotomimam.weebly.com/uploads/1/3/4/6/134694318/momolatasimel_kilofezekema.pdfIn PDF document text
    • http://avbox.org/affine_transformation_python_pointsbcul1.pdfIn PDF document text
    • http://baykamif.space/10844175500zshrz.pdfIn PDF document text
    • http://prizinsta.online/11403333719s6d7i.pdfIn PDF document text
    • https://wazivako.weebly.com/uploads/1/3/0/9/130969042/9694921.pdfIn PDF document text
    • https://mifabawir.weebly.com/uploads/1/3/0/7/130776047/desuvovidupili-totakuxa-nivazalawimezut-baxopowake.pdfIn PDF document text
    • https://tagewojozupuk.weebly.com/uploads/1/3/4/3/134358966/66ca8b60b0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460048/normal_600523ff1ebce.pdfIn PDF document text
    • http://tendernes.ru/raratezunamebio0vxq.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495050/normal_60198eb3bd1a8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489033/normal_5fc99e45bda87.pdfIn PDF document text
    • http://zoomita.fun/354298896871hau7.pdfIn PDF document text
    • https://rinotawobuv.weebly.com/uploads/1/3/4/7/134768279/bozejuvatawik_pesupixowo_fakunarovodo.pdfIn PDF document text
    • http://huaweistoreukr.xyz/android_7_minimum_system_requirementsprb7p.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jusuberu/57576883862.pdfIn PDF document text
    • https://s3.amazonaws.com/pukaridimupo/5x8_index_card_template_word.pdfIn PDF document text
    • https://s3.amazonaws.com/vukumesoj/marco_island_florida_red_tide_report.pdfIn PDF document text
    • https://s3.amazonaws.com/xesigeze/sony_vaio_laptop_brightness_control_driver.pdfIn PDF document text
    • https://s3.amazonaws.com/tobaziw/bharat_movie_songs_free_naa_songs.pdfIn PDF document text
    • https://s3.amazonaws.com/rivazixexuguri/entrepreneurship_class_11.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_off00012b07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B07 4784 bytes
SHA-256: db30c9ae80aaa4de0750a6e35ef2db84a4f0ed4c07e0cf9a57ba51910c7104ea
font_01_sfnt_off00013b56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B56 11392 bytes
SHA-256: d9dd5441900413c1d9aedbd129cbcf8ff00fc181a3b51267601d5f38f951c340

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