Malicious PDF — malware analysis report

Static analysis result for SHA-256 806b399ca8e91e03…

MALICIOUS

PDF

79.3 KB Created: 2021-05-14 16:06:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 9e7f46b443ee5b4915f469c8e4ff3983 SHA-1: 996c99e65326cb0c9a7e8a99291665630bf5bb1e SHA-256: 806b399ca8e91e039f0f24e95bffd1340a4a10c21dd64c6871b91a92d0d4df74
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are SEO-optimized, suggesting a link farm or phishing attempt. One prominent URL, 'https://xezojetit.ru/strik?utm_term=lincoln+mig+weld+pak+180+hd', is flagged as suspicious. ClamAV and ML classifiers also identified this PDF as malicious, specifically as a phishing trojan. While no scripts were explicitly extracted, the PDF structure and embedded links strongly indicate a malicious intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 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://xezojetit.ru/strik?utm_term=lincoln+mig+weld+pak+180+hd PDF link annotation
    • http://zawukinaloluku.sportsontheweb.net/annexure_6_form.pdfIn PDF document text
    • http://zuvalasit.mypressonline.com/4485037361.pdfIn PDF document text
    • https://wosowabo.weebly.com/uploads/1/3/4/3/134340570/1442073.pdfIn PDF document text
    • http://duwinijuj.mypressonline.com/brills_express_newspaper_download.pdfIn PDF document text
    • https://xowebanum.weebly.com/uploads/1/3/1/4/131453595/56e748309cc.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/zunaduxa/zuwejuzixexowakejagapax.pdfIn PDF document text
    • https://s3.amazonaws.com/kofabube/free_petty_cash_ledger_template.pdfIn PDF document text
    • http://metiguwuwezaza.atwebpages.com/bass_guitar_tab_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/kewuxejikiwe/wd_my_passport_ultra_does_not_showing_up_mac.pdfIn PDF document text
    • https://s3.amazonaws.com/gowupuzokowuxes/australian_dietary_guidelines_infant.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b4f8e35-5c84-4f38-ab86-4d39d1f00c2f/dometic_8500_plus_awning_parts.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/35aa8993-b00e-4421-8792-2f1558593643/pipibuza.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d05591c-3ae5-4ce8-8e14-be6bd1aaf7c6/adt_safewatch_pro_3000_clear_codes.pdfIn PDF document text
    • https://s3.amazonaws.com/fotojipifuzitul/bitvise_ssh_client_7._15.pdfIn PDF document text
    • https://s3.amazonaws.com/fovezewi/coliformes_totais_na_agua.pdfIn PDF document text
    • https://s3.amazonaws.com/dutimajizowa/how_to_do_standard_deviation_on_calculator_ti_30x_iis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/54f92816-9c07-4613-bee7-db48e6545bdd/4450848623.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/87931a93-6c3e-4ab1-85b6-2c80c4488516/norton_field_guide_to_writing_online.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/904d4790-f2fe-44a2-aca1-4f6de0a95b4e/pathfinder_armor_masters_handbook_download.pdfIn PDF document text
    • http://kuwijiti.myartsonline.com/beps_action_1.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/23e8d000-889b-4729-8839-0513c3a46cce/70346744548.pdfIn PDF document text
    • https://s3.amazonaws.com/jeworurowam/wibidevorawogexa.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_off0000f661.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF661 5696 bytes
SHA-256: 642a33a5f02d2fc175afb225ab293de722972a3167f8b6048fa6a40f866ffe0e
font_01_sfnt_off000109c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109C6 11100 bytes
SHA-256: 23b870e2ab1cfc55985dcd4b246e504b065f1eb1701a7517e5ccd86e707ea46f

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