Malicious PDF — malware analysis report

Static analysis result for SHA-256 4fe6b6e5f6ed6913…

MALICIOUS

PDF

77.0 KB Created: 2021-01-29 07:52:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: a2780b5afcba3c48ef43fd3f77ab5b65 SHA-1: 3c4cd5f5ca901f85a44c38fa0dc03667301c8533 SHA-256: 4fe6b6e5f6ed6913969025cee121c6bb574e346db192591c910b2ebdfaf1e7fa
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, with the primary URL pointing to a suspicious domain associated with SEO manipulation or phishing. ClamAV and ML classifiers also flagged this file as malicious, specifically as a phishing trojan. While no scripts were explicitly extracted, the PDF structure and the presence of numerous external URIs suggest an attempt to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://jottigo.ru/wb?keyword=extraordinary%20parenting%20rickman PDF link annotation
    • https://pebawozo.weebly.com/uploads/1/3/4/8/134865175/155be05f0412.pdfIn PDF document text
    • http://copyrighthelpbusiness.net/57351679560jsg1x.pdfIn PDF document text
    • http://seedcraft.online/pesajiwomininexipin58me.pdfIn PDF document text
    • http://ing-cliente.com/rinetudowefatonusewofefu7di54.pdfIn PDF document text
    • http://ruzazeruduzelu.22web.org/94817143534.pdfIn PDF document text
    • http://doniposebuk.iblogger.org/kingdom_hearts_union_x_guide_2019.pdfIn PDF document text
    • https://vanazufir.weebly.com/uploads/1/3/2/7/132740694/fidipirunokimo.pdfIn PDF document text
    • http://testersairf.xyz/baxuwaduroxegemen5h54h.pdfIn PDF document text
    • https://dawikuwavuvuka.weebly.com/uploads/1/3/4/8/134866752/9870905.pdfIn PDF document text
    • https://cdn.sqhk.co/jesotipo/gfoldDm/jadaz.pdfIn PDF document text
    • https://tesegedoveveda.weebly.com/uploads/1/3/4/8/134891870/2552078.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/bokofapig/adjust_column_width_google_sheets_ios.pdfIn PDF document text
    • http://joxumokuri.epizy.com/business_formal_vs._business_casual.pdfIn PDF document text
    • https://s3.amazonaws.com/suzujewa/dolopixofaduri.pdfIn PDF document text
    • https://s3.amazonaws.com/pegozegi/cell_communication_the_inside_story_worksheet_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/fajujiju/vorubufamakedewarazanu.pdfIn PDF document text
    • http://kotasogova.rf.gd/occupational_health_and_safety_policy_template_ontario.pdfIn PDF document text
    • https://s3.amazonaws.com/feliso/ecg_test_questions_and_answers.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d151.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD151 5376 bytes
SHA-256: d33a82bd975c63288aba0079d1e10a9cde3ebb2a8e63e0d88f025ab3ec0a5d5f
font_01_sfnt_off0000e391.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE391 2252 bytes
SHA-256: ee967336568f77ff61a5ae04097864f25fb24cf77b94457ab20e22408cc95c1c
font_02_sfnt_off0000ecf8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECF8 9992 bytes
SHA-256: f78b058f5d7d2dd0a0e333007016ac750714ed73fc0c8d967efec3543618933c
font_03_sfnt_off00010f76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F76 16636 bytes
SHA-256: 3a1662b091690ab1c7a909dc16fce2690319fe294eda2dca2f77ae82a6008262

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