Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc7f87dc0e26fd40…

MALICIOUS

PDF

90.9 KB Created: 2021-04-28 03:21:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 9616d27bbdb45d10659ecb31fdfda799 SHA-1: 92a91da3ee660f81147e7a24558f4b54a93db555 SHA-256: fc7f87dc0e26fd407ffdba9f2d3209e8c170443ba853a8a079d92c4b863879b9
156 Risk Score

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 0.9992

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://crophysi.ru/strik?utm_term=x3+terran+conflict+building+stations+guide PDF link annotation
    • https://cdn.sqhk.co/fokofike/uzAhbjd/dixemosorasigijaxevajup.pdfIn PDF document text
    • https://cdn.sqhk.co/zoluxoni/2angj7P/jukewebodopum.pdfIn PDF document text
    • https://cdn.sqhk.co/nifodotiriru/bqgeQgd/10470373473.pdfIn PDF document text
    • https://cdn.sqhk.co/ditetona/TKtLiZJ/photo_editor_app_for_windows_10_free.pdfIn PDF document text
    • https://cdn.sqhk.co/nosimasiv/iMVYpy3/57046820228.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/wolawatin/declare_variable_in_template_angular.pdfIn PDF document text
    • https://12350a4d-732a-4148-85a7-4fa27f2a77ec.filesusr.com/ugd/17beed_cfb512cd218b4ef5947dcf2ba0ac0c86.pdf?index=trueIn PDF document text
    • https://ba10d46a-d7c1-43af-8542-f1a50f31aa8a.filesusr.com/ugd/4dded2_415bc2bccdfb4e3c838d902b7d5d7de1.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bomifabipi/format_factory_setup_for_pc.pdfIn PDF document text
    • https://2ae8fa2d-8b21-4cd7-bd94-b44763fb9b4d.filesusr.com/ugd/8e1ec7_12a3a0d18f7b45b4a268fc3c13db9d5a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vexeliku/star_wars_trumpet_sheet_music_easy.pdfIn PDF document text
    • https://f7e05ffc-afae-4d19-be15-7e9c659e5e5f.filesusr.com/ugd/72f62b_ee279030ec644753a545a9e90e25c725.pdf?index=trueIn PDF document text
    • https://9e77dbea-16d6-438e-9859-4a68c5388828.filesusr.com/ugd/3225da_cab702ff60b04b1b8d9a600aadc52e17.pdf?index=trueIn PDF document text
    • https://c580675e-8888-491d-8c80-3106eaac86fb.filesusr.com/ugd/c8a981_956f184d7ee84ad1b239bb3108db2f9a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vogubivajavofu/92386353788.pdfIn PDF document text
    • https://425e2ee7-996f-4c6d-a593-b44a2a39b733.filesusr.com/ugd/bb05c1_167ee6e5ca774583b7b1db4361b24b88.pdf?index=trueIn PDF document text
    • https://9e0ebcba-7e04-41ac-afc6-cfc574163c15.filesusr.com/ugd/6725b5_9cff20249ecd4f08aaebb5318eddff8d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/ritoma/esic_accident_report_form_16.pdfIn PDF document text
    • https://f1ddcea9-c323-452c-a4d3-aaefec61e50a.filesusr.com/ugd/defd8a_05c8966cb6804c528d83fe4f16bb1655.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tugabijenovili/tinaz.pdfIn PDF document text
    • https://s3.amazonaws.com/pivetuzadujo/75472156634.pdfIn PDF document text
    • https://s3.amazonaws.com/saziwijaxodav/unbearable_lightness_of_being_amazon.pdfIn PDF document text
    • https://s3.amazonaws.com/jeromopelurab/vugedivategag.pdfIn PDF document text
    • https://018ae6bf-5b6e-4bf7-bb5f-89503284f855.filesusr.com/ugd/b7931c_94349e3613444fbdbf0577d284af15db.pdf?index=trueIn PDF document text
    • https://7162416e-a815-4e2e-b4b4-2f1b6d3d7a1b.filesusr.com/ugd/0723a7_adf11ec473544179b9d84729835e59f7.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_off000122f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122F8 5472 bytes
SHA-256: 546e90686554d9b2c8515735b0120c3fc6b0da8a7d74b6ed6f2186467d833485
font_01_sfnt_off0001359c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1359C 11416 bytes
SHA-256: e228e46df2807c3455487707f9e48f12cec34a99f450ceaad2453fc455c81298

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