Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc047ad904486167…

MALICIOUS

PDF

87.8 KB Created: 2021-04-07 01:42:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: e42312790ec84dae1e38b37628ab75e5 SHA-1: 5a6d18bd46ddd0274cdf8a8b3d854375e719b234 SHA-256: dc047ad9044861676d13e120ce180daa1af6cb42daca581e84a9fe888d71d6be
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 0.9993

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://zajinet.ru/strik?utm_term=what+is+there+to+do+on+a+monday+night+in+atlanta PDF link annotation
    • http://nogefiri.iblogger.org/vuwigojuziselero.pdfIn PDF document text
    • http://gokojemisivuf.22web.org/fowagimotogolovomixusi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://54957a25-093b-4cbd-a4f0-8eb5fea931f0.filesusr.com/ugd/8ba634_e2cd2059552748aab699385b29243140.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fadadedezeker/xuxanemabefefaforu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/449987f1-d0f1-4e0c-a3d5-5982d5fc9b2e/galopololofojepusow.pdfIn PDF document text
    • https://s3.amazonaws.com/dofufiri/deloitte_brand_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/bulujono/56264886601.pdfIn PDF document text
    • https://297de083-771a-4730-a3b8-a2afe8c7d209.filesusr.com/ugd/47424f_c4e942863edc4413b5cfba6d6a70ca22.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/f1783ac7-9863-4ead-b123-7f26cb9c38b9/keravokidujebeziset.pdfIn PDF document text
    • http://tatasoge.epizy.com/persona_5_max_confidant_guide_gamefaqs.pdfIn PDF document text
    • https://35057dd6-1d18-4acd-96c9-af3b7fddc7cd.filesusr.com/ugd/978dd5_e99e215bf97543e5b420260bdf22629f.pdf?index=trueIn PDF document text
    • http://naremijex.epizy.com/oxford_thesaurus_dictionary_free_download.pdfIn PDF document text
    • http://xomulaseropo.epizy.com/36210996948.pdfIn PDF document text
    • http://futotaze.epizy.com/kufomilapojuwiwatagad.pdfIn PDF document text
    • http://patafisowu.rf.gd/xeletebef.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d58e908-88eb-4aa3-975d-49aa2deb6a64/jump_force_ps4_gameplay_espaol.pdfIn PDF document text
    • http://jipokogave.epizy.com/vegopoxusoz.pdfIn PDF document text
    • https://s3.amazonaws.com/gafedupeba/pusevitojuguwerovon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/176402c2-1fd5-415b-af50-90382d04a58c/2007_club_car_precedent_parts_list.pdfIn PDF document text
    • http://loxupib.rf.gd/how_to_fax_from_epson_wf-2630.pdfIn PDF document text
    • http://vozerurivuboki.epizy.com/functional_foods_market_report.pdfIn PDF document text
    • https://s3.amazonaws.com/kumasala/schengen_visa_application_form_france_south_africa.pdfIn PDF document text
    • http://beruleruz.rf.gd/87184217152.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_off000117e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117E6 5352 bytes
SHA-256: cfcaa6418b346da9400c9903075856ad32788c85624ffe0306dd29b61a858cd6
font_01_sfnt_off00012a02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A02 11124 bytes
SHA-256: ee89b9c9f0a3684d53b01e9b4ec280be0df87e62e6c4a6e2617cc21fdcb5ea6a

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