Malicious PDF — malware analysis report

Static analysis result for SHA-256 b68f880c1fae153a…

MALICIOUS

PDF

78.4 KB Created: 2021-03-22 04:48:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 36ec6c712114fc1a046fe91cb3376d40 SHA-1: 82d8f106dfa576102f64dcb5572d6b48b0a43685 SHA-256: b68f880c1fae153ab97fd6ebae9e900bdb9c6b02eae700cf5ac6b3eb7b63b6a7
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 0.9999

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://pelibifir.ru/wix?keyword=toy+story+4+live+stream+reddit PDF link annotation
    • http://b4shop.icu/771247922074n7zf.pdfIn PDF document text
    • http://chtotakoevuxom.biz/lowelobediwovivulovaxnmry.pdfIn PDF document text
    • http://bnl-jobs.com/craftsman_c3_19.2_volt_lithium_ion_battery_charger_manualncp2t.pdfIn PDF document text
    • http://tk-pobeda.site/losaxoniromok7wtp.pdfIn PDF document text
    • http://amaryllis.space/79559050381p5ajw.pdfIn PDF document text
    • http://idslim-italia.site/sky_cinema_now_tv_guidet7q2t.pdfIn PDF document text
    • http://idealica-italy.site/gugelenomiy2fcr.pdfIn PDF document text
    • http://item-get.top/lords_mobile_hero_stages_guide_7-_12trr6p.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/a82a2b78-a7c7-4cf4-80fd-7a2231492a5c/oppo_bdp_105_4k.pdfIn PDF document text
    • https://s3.amazonaws.com/lerezazo/clark_forklift_dealer_ontario.pdfIn PDF document text
    • https://s3.amazonaws.com/rolefosiju/7893880937.pdfIn PDF document text
    • https://s3.amazonaws.com/fadedosi/power_of_attorney_template_florida.pdfIn PDF document text
    • https://s3.amazonaws.com/baposivarabuj/46112359464.pdfIn PDF document text
    • https://s3.amazonaws.com/tugumeb/growth_strategy_ppt_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/51151549-fef0-46e6-890c-8e3ad63403df/23406174784.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d74d22ae-ce26-43f4-8c37-955c6807ab8b/kosadazokosoxan.pdfIn PDF document text
    • https://s3.amazonaws.com/takateg/excel_vba_copy_cells_with_formatting.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/240b225a-abe0-431e-87cb-44d15b97f485/the_practice_season_8_cast_changes.pdfIn PDF document text
    • https://c8070bf9-ed42-4c5d-8eb8-ca35ee70f136.filesusr.com/ugd/d38238_834a1b8f73944eb3b4ff1e6d21b29b7c.pdf?index=trueIn PDF document text
    • https://df9240ce-57b4-430e-a582-521170ca5232.filesusr.com/ugd/10b03a_db13ecbcc194457792479211fdba8e43.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wotodedaruzuk/assistant_banquet_manager_interview_questions_and_answers.pdfIn PDF document text
    • https://ebcfae26-b4e4-4f1a-a5b2-c5bdbddc1bdf.filesusr.com/ugd/259f90_0073982bf6af47e3ae2d845343ced668.pdf?index=trueIn 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_off0000f3e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3E4 5168 bytes
SHA-256: c95f66853ff45391b499d18d9d177409b16281468747b6b83db50a93571ade75
font_01_sfnt_off00010573.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10573 11424 bytes
SHA-256: 74061aef75a78a84c5121e1194828b7177c7db7b0b55a01c69eafe6f5f02417e

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