Malicious PDF — malware analysis report

Static analysis result for SHA-256 92b74afd9b2cccfa…

MALICIOUS

PDF

68.7 KB Created: 2021-03-12 14:32:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: 1d56a8cb1215e2e4dcfb48e29b1275e8 SHA-1: f26f1044787b39124f25e3e9c3cf5c825bc26e2e SHA-256: 92b74afd9b2cccfa328a1f96ba6c9cc899c75697ee009e2ba32a579e22f3b5da
126 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, identified as a link farm on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest it's designed to redirect users to a malicious site, potentially for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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 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=guns+of+mayhem+redux PDF link annotation
    • http://stroy-level.ru/bohemian_rhapsody_trumpet_sheet_musicsdu2k.pdfIn PDF document text
    • http://ostanni.fun/7551850886366dee.pdfIn PDF document text
    • http://iclod.tech/31499653033do036.pdfIn PDF document text
    • http://ditumen.22web.org/fha_streamline_refinance_without_an_appraisal_worksheet.pdfIn PDF document text
    • http://pegiwikepideke.iblogger.org/69148968327.pdfIn PDF document text
    • http://tesubozapo.22web.org/what_is_the_possible_theme_of_everyday_use.pdfIn PDF document text
    • http://soul-felt.com/30446125738uqsg6.pdfIn PDF document text
    • http://soribowunalosu.22web.org/solving_word_problems_with_fractions_worksheet.pdfIn PDF document text
    • http://itrom.fun/vebiwupedofixuw9zee5.pdfIn PDF document text
    • http://wwbook.org/vajegzkoyw.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/falevi/siwipejefidabepugef.pdfIn PDF document text
    • https://198d5876-2e36-4a54-a59d-b4c1060b65be.filesusr.com/ugd/4733ca_8b14fc249c85456a89c6cda541e59c32.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pekatikisuruki/acer_aspire_one_532h_2588_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/sudevejerifu/dolitavit.pdfIn PDF document text
    • http://fesamemosonug.rf.gd/48550932297.pdfIn PDF document text
    • http://zigubogujivo.epizy.com/samefinamodag.pdfIn PDF document text
    • http://sejojoxo.epizy.com/niwuzene.pdfIn PDF document text
    • http://kunijudodo.rf.gd/how_do_you_evaluate_a_checklist_observation.pdfIn PDF document text
    • https://c78267de-509c-4cb0-9394-6b21b7876e04.filesusr.com/ugd/290ce3_17bf0679358b4930b297ab9dd752ae55.pdf?index=trueIn PDF document text
    • https://03dfb0eb-7fe6-4188-ad87-ea2b88df7b19.filesusr.com/ugd/f967ac_51e1415dba224ade9cbfdf0f9fbd8eb0.pdf?index=trueIn PDF document text
    • https://3cd6846c-369c-4875-9c63-132df726a2dd.filesusr.com/ugd/7ab50f_5e56ca4d135648fa9454e206ab73da3c.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_off0000d180.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD180 5316 bytes
SHA-256: ccf95fd2bba6f9a1c70ccab3825b88b100bccb1af1b9263228ef9468696fd1d0
font_01_sfnt_off0000e374.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE374 10136 bytes
SHA-256: ef19e33b4e27182e34857c4330b1f8a775b8e4dcef0a489a8d4c2f02b9c57477

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