Malicious PDF — malware analysis report

Static analysis result for SHA-256 882f3e5b2d38e8c4…

MALICIOUS

PDF

96.5 KB Created: 2021-03-24 11:29:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 341a1bc9600581da23e25a0a7f475678 SHA-1: 121fcecaf9629a4ef340f1ea7ca8f704382d7f69 SHA-256: 882f3e5b2d38e8c44b0c60de1f530531a954df6db7604407fcb2fae960f3896b
214 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 and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/wix?keyword=galanz+microwave+manual+download In PDF document text
    • https://gifuliranofave.weebly.com/uploads/1/3/0/8/130873810/3874063.pdfIn PDF document text
    • https://cdn.sqhk.co/vadavenaw/88ib1x4/72923177297.pdfIn PDF document text
    • http://vivaxuza.iblogger.org/what_is_a_reset_button_on_computer.pdfIn PDF document text
    • http://zokumujanuni.iblogger.org/ap_biology_lab_1_osmosis_and_diffusion.pdfIn PDF document text
    • https://cdn.sqhk.co/vedanoderifu/Afagiif/62056166552.pdfIn PDF document text
    • https://xuxefakeni.weebly.com/uploads/1/3/4/2/134234722/c1787d21.pdfIn PDF document text
    • https://cdn.sqhk.co/tojofelekob/eDcnbgf/punivofekaruxefotoje.pdfIn PDF document text
    • https://cdn.sqhk.co/fogobewataja/ghNhbGu/puwexowakojefiwuwefi.pdfIn PDF document text
    • https://cdn.sqhk.co/xewafazuk/nuihw8z/mcdonald_s_breakfast_hours_covid-_19.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fugazite.epizy.com/25573890411.pdfIn PDF document text
    • https://s3.amazonaws.com/zaxawetawupo/what_is_made_of_membranes_that_contain_chlorophyll.pdfIn PDF document text
    • http://lavebaku.rf.gd/84265431831.pdfIn PDF document text
    • http://xatidewivi.epizy.com/midejizafenerenekenulajev.pdfIn PDF document text
    • https://s3.amazonaws.com/zidosozawok/39763847078.pdfIn PDF document text
    • http://mitijolazu.rf.gd/detailed_lesson_plan_in_science_grade_7.pdfIn PDF document text
    • https://s3.amazonaws.com/voxulija/vewulonosakat.pdfIn PDF document text
    • https://s3.amazonaws.com/vukujidor/libabode.pdfIn PDF document text
    • https://s3.amazonaws.com/tobaziw/template_powerpoint_school_free.pdfIn PDF document text
    • https://s3.amazonaws.com/sabegokek/burnside_high_school_uniform.pdfIn PDF document text
    • http://waruzav.epizy.com/guider_publication_gk_book.pdfIn PDF document text
    • https://s3.amazonaws.com/pipaneku/xulanipulutafinuvuzopita.pdfIn PDF document text
    • http://boromepi.rf.gd/lexique_des_termes_juridiques_francais_arabe.pdfIn PDF document text
    • http://vumavoralamo.rf.gd/rexozamabojegolezus.pdfIn PDF document text
    • https://s3.amazonaws.com/kozibowisenatu/salem_witch_trials_documentary_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/sixenogafopoj/wafime.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000120a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120A2 5140 bytes
SHA-256: d7b2467818925479f53c33c58329c982cacc87f3d0bacd55b1ac4116de219ecb
font_01_sfnt_off00013227.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13227 13904 bytes
SHA-256: e4ab82dc84f883940387098dc03c44ce131dac6dbaab15eec21b68f9e6489d8c
font_02_sfnt_off00015e0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15E0B 16260 bytes
SHA-256: efcda8d0ea25d013786d5cbe7517ed73f55ce1dfb17c74525e0554ea8b1a3d3d

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