Malicious PDF — malware analysis report

Static analysis result for SHA-256 fec07b46cd9dcc74…

MALICIOUS

PDF

68.1 KB Created: 2021-03-04 18:38:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 78b6990cc2cd49896fcc7e93fa078e6e SHA-1: 829e72b13004c97b1068a8706d89360759b779b6 SHA-256: fec07b46cd9dcc74318e4b639c978e3feb2b9bc07d06ffad4e776dde793daac0
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic suggests it functions as a link farm, directing users to numerous domains, one of which is https://maypoin.ru/wix?keyword=kroger+john+r+rd. The presence of embedded URLs further supports this, indicating the document's primary purpose is to redirect users to external, potentially malicious, sites.

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://maypoin.ru/wix?keyword=kroger+john+r+rd PDF link annotation
    • http://mojuwimonimo.22web.org/dna_fingerprint_analysis_worksheet.pdfIn PDF document text
    • https://cdn.sqhk.co/baxoladipezu/OxjcgiT/nirikipovamowep.pdfIn PDF document text
    • https://cdn.sqhk.co/xumupojamax/ie1Bhjc/dead_effect_apk_mod_1._2._2.pdfIn PDF document text
    • http://stixlife.info/whiteboard_animation_software_for_pc_freelmb3j.pdfIn PDF document text
    • https://cdn.sqhk.co/sifajoxojif/jDig5kI/50631231326.pdfIn PDF document text
    • http://netzamka.ru/14845891018uyaga.pdfIn PDF document text
    • https://cdn.sqhk.co/pivokazi/heicjsf/nabozavivizuxevamivimewi.pdfIn PDF document text
    • https://cdn.sqhk.co/vuxesojogugu/haJauAs/fifa_world_cup_qualifier_2019_asia.pdfIn PDF document text
    • http://weareanonymous.org/vukulukewudepuweturplfd.pdfIn PDF document text
    • http://com-signto5.xyz/gurejisuxur9jbi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://najanezajuv.epizy.com/74240590192.pdfIn PDF document text
    • http://pesuvomekujidi.rf.gd/84596891711.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8372a7f9-9a2b-49b2-93d9-2d50e76e55c4/77650392245.pdfIn PDF document text
    • https://aa3bb5c3-2bd4-4791-9e2a-6e31d5009b04.filesusr.com/ugd/60e703_f16e9ae770b641338023a805230b4d2f.pdf?index=trueIn PDF document text
    • http://zemoriwakaxi.epizy.com/waste_to_energy_journal.pdfIn PDF document text
    • https://f7f2eb1f-4ce6-40bf-b337-6bcc2c9c1a95.filesusr.com/ugd/dc6899_6da6a413a32e4c71abe0e91e5593f0f5.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dovulavavo/dojegedorenumurezanu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/20f35dcd-5f2b-47b6-9818-96e7cece6a62/skyrim_glass_greatsword_location.pdfIn PDF document text
    • https://s3.amazonaws.com/nagudo/3866682281.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_off0000cf6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF6F 4712 bytes
SHA-256: 0f40135cf6932f438d4cbcc06bd42574ffff13dbae0964d31e23111c2123adb7
font_01_sfnt_off0000df7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF7C 10424 bytes
SHA-256: 29c08db12c766a5334b2bef9d6203a2b802c83550265aa8b59867a531e623a68

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