Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2c037d732c7a508…

MALICIOUS

PDF

109.8 KB Created: 2021-05-26 13:31:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 14a156c2aeb6379d79fdb32f20882ae5 SHA-1: c1758f937e69b2c0054955ea732c47a39df4046f SHA-256: e2c037d732c7a50806e82db75915bfc6e886c1f82b023af563db5da507cdec97
186 Risk Score

Malware Insights

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

This PDF file is identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, directing users to numerous external URLs, including one that appears to be a phishing lure related to chromatography applications. The presence of multiple external links and disposable hosting suggests an attempt to distribute malicious content or engage in SEO manipulation for malicious purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://pelibifir.ru/strik?utm_term=what+are+the+three+applications+of+chromatography PDF link annotation
    • https://nazokorebuvawir.weebly.com/uploads/1/3/0/7/130776058/dolumakudukezo.pdfIn PDF document text
    • https://mavezuwunokil.weebly.com/uploads/1/3/4/6/134627141/530998.pdfIn PDF document text
    • https://gilepinewuje.weebly.com/uploads/1/3/4/0/134096317/db9701b047b0.pdfIn PDF document text
    • https://dogusomuribe.weebly.com/uploads/1/3/0/8/130814063/7483e958.pdfIn PDF document text
    • https://dewanuraxode.weebly.com/uploads/1/3/4/3/134324700/zalalo_naxumosinedo.pdfIn PDF document text
    • https://buvawaxeve.weebly.com/uploads/1/3/0/8/130874113/281291.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/41c97916-98c5-4128-8264-8c0576a04019/what_temperature_does_a_morphy_richards_slow_cooker_cook_at.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8bbbde73-94d4-45a6-9051-005767fa447a/kipoxuzup.pdfIn PDF document text
    • https://s3.amazonaws.com/lunojol/galogeledajaton.pdfIn PDF document text
    • https://s3.amazonaws.com/tumasun/dolce_gusto_nescafe_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/sabobenuwe/dusigog.pdfIn PDF document text
    • https://s3.amazonaws.com/gaxuremewuger/long_vowel_sounds_worksheets_for_grade_1.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3686cc75-f168-4828-88b2-9a9f5321c22e/93270227161.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0672946a-cea0-40bf-8605-7ff62a536cde/how_to_get_started_writing_an_ebook.pdfIn PDF document text
    • https://s3.amazonaws.com/jifedefujodu/format_date_field_in_crystal_reports.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1ea0d01a-1178-4fe0-a7d8-7f282f135193/hp_officejet_4500_wireless_all-in-one_printer_driver_download.pdfIn PDF document text
    • https://s3.amazonaws.com/petikamov/zosufaporo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d294670b-5a3a-4b45-94d2-93b46d20d34b/christopher_paolini_eragon_book_6.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/21d12372-8bfb-4d9c-a6d9-f6ca95cb919e/8174702969.pdfIn PDF document text
    • https://s3.amazonaws.com/baxunaf/mudab.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/789f582d-7a2f-451b-b753-ed0108079e17/cuisinart_coffee_maker_grinder_not_working.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd9541ab-974b-4348-9d4f-b7408b47aa52/how_to_study_color_wheel.pdfIn PDF document text
    • https://s3.amazonaws.com/nawuvud/honeywell_vision_pro_8000_wifi_manual.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_off000168f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x168F6 5544 bytes
SHA-256: 53872b79eb220ba8ece72dfa4f7adb1716748fadb97221befbf88227adef3ed7
font_01_sfnt_off00017bba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17BBA 14136 bytes
SHA-256: 1cd8393264cf57d830a840c37dfef22d5e002a1ce4da638c4e12341a606cad3a