Malicious PDF — malware analysis report

Static analysis result for SHA-256 67433fa6c62be586…

MALICIOUS

PDF

69.3 KB Created: 2021-04-27 19:41:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 6a7c3e88877b6bb000b7d2c0cebb8b5f SHA-1: 97f0a3d678d2d8bb8d21662e782882e61a095baf SHA-256: 67433fa6c62be586a7b85c69fb24603ae38c7f650c513c86743ca006e5ecefa0
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 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://mezovuduw.ru/strik?utm_term=mind+and+the+world+order+outline+of+a+theory+of+knowledge PDF link annotation
    • http://zozuwax.66ghz.com/xuzotazuxajekulegoli.pdfIn PDF document text
    • http://fujabum.iblogger.org/dajez.pdfIn PDF document text
    • http://tibagisuminove.sportsontheweb.net/1305911125.pdfIn PDF document text
    • http://ruzazeruduzelu.22web.org/suviwegesop.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tenowuwewid.epizy.com/animal_word_search_hard.pdfIn PDF document text
    • http://tebokemirutexus.rf.gd/annual_maintenance_report_format.pdfIn PDF document text
    • https://s3.amazonaws.com/didowugorokirug/96068565859.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b292bca9-8506-4ac2-a42f-e355cc46842b/xokag.pdfIn PDF document text
    • http://lukovim.epizy.com/ranakugumazurolu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a523a800-d184-4dd2-a200-84b49325efb9/zojeluxonapoge.pdfIn PDF document text
    • https://s3.amazonaws.com/neviwove/vumaf.pdfIn PDF document text
    • https://7ed754b6-a209-4558-9281-0032c7ee8ade.filesusr.com/ugd/4329d7_8464a89d93e14410bb6a7b75745a60e7.pdf?index=trueIn PDF document text
    • http://forezepolutaju.onlinewebshop.net/romeo_and_juliet_argumentative_paper.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1ba0dec7-4cdb-4956-9f98-1063fde80f56/divine_mercy_catholic_church_north_courtenay_parkway_merritt_island_fl.pdfIn PDF document text
    • http://xalezojo.epizy.com/zazofeminetid.pdfIn PDF document text
    • https://s3.amazonaws.com/werowibovezoje/56047862830.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/68193524-2297-495d-b082-c0845e81d99f/what_is_the_symbol_for_a_light_bulb.pdfIn PDF document text
    • https://s3.amazonaws.com/dojivewobasuval/85884911712.pdfIn PDF document text
    • https://7f03322d-63d6-449b-a8c2-a80beffeb2b6.filesusr.com/ugd/2994dd_f4f6caf99e4e42b381d0f088fca1fd4f.pdf?index=trueIn PDF document text
    • https://af18ad75-7652-4b25-b9e0-8da5fded0af1.filesusr.com/ugd/529385_4dd6b3e3794c40ad893de1ffa64fcc67.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_off0000d26a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD26A 5256 bytes
SHA-256: 660dbd8227e2f8dcb6c103401de25d0c0466152155ce8a2f1777faa6c5b76f3b
font_01_sfnt_off0000e46c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE46C 10280 bytes
SHA-256: 3c9d58de8c3b9cf1ef0b45760c8805e418d7b546b9a83cc00f47520ca58e0b2f

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