Malicious PDF — malware analysis report

Static analysis result for SHA-256 dbc9ab4a32b88c7c…

MALICIOUS

PDF

79.3 KB Created: 2021-04-06 13:56:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: a0df3f2177f8fac15d43be0e65b9dac4 SHA-1: 9c88a0375b071ac08f55c611d80c2e323bf7e1dd SHA-256: dbc9ab4a32b88c7c5920687dbd9268a4d739fcea05a03fd8383b9d0bc47f4dc8
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 0.9964

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://xezojetit.ru/award?keyword=reading+comprehension+grade+2+worksheets+pdf PDF link annotation
    • https://vigodabazo.weebly.com/uploads/1/3/4/8/134872933/bitajilalozo.pdfIn PDF document text
    • https://vumizopefi.weebly.com/uploads/1/3/5/3/135313358/nirevojun.pdfIn PDF document text
    • https://nifirasevaxo.weebly.com/uploads/1/3/4/7/134756957/jebidofepuwoxo_kilitapesor.pdfIn PDF document text
    • https://cdn.sqhk.co/vufebevefo/fpihOgh/82939772847.pdfIn PDF document text
    • https://cdn.sqhk.co/vofonowul/6hi5hdp/cooking_decor_home_design_house_decorate_games.pdfIn PDF document text
    • http://batizilojado.22web.org/55698185961.pdfIn PDF document text
    • https://cdn.sqhk.co/sezogitov/jsheVif/second_hand_designer_childrens_clothes_online.pdfIn PDF document text
    • https://gitikaru.weebly.com/uploads/1/3/4/9/134901111/d1e185cd.pdfIn PDF document text
    • http://vamofawevized.22web.org/electrical_network_problems_and_solutions.pdfIn PDF document text
    • https://cdn.sqhk.co/moserusoba/hhxeyku/nda_exam_syllabus_for_army_wing.pdfIn PDF document text
    • http://kurepez.22web.org/27781004090.pdfIn PDF document text
    • https://cdn.sqhk.co/mixaluwekitu/DLAgj5Y/totuzafukiwimogoruwurut.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/veraxawewib/zuvuvalunabekalilozizul.pdfIn PDF document text
    • https://s3.amazonaws.com/memexelu/espanol_santillana_level_4_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/zakunafu/49921237033.pdfIn PDF document text
    • https://s3.amazonaws.com/varolexexus/87297188203.pdfIn PDF document text
    • https://s3.amazonaws.com/tomaxade/pacman_30th_anniversary_game.pdfIn PDF document text
    • https://s3.amazonaws.com/legipalofi/jodolekovigumetem.pdfIn PDF document text
    • https://s3.amazonaws.com/bokofapig/stakeholder_engagement_and_communication_plan_template.pdfIn PDF document text
    • https://s3.amazonaws.com/kofabube/irobot_roomba_i8_vs_i7.pdfIn PDF document text
    • https://s3.amazonaws.com/vizegemawokaxe/nixipisovoxaxegozalos.pdfIn PDF document text
    • https://s3.amazonaws.com/dowesitobuga/libro_hind_bhagavad_gita.pdfIn PDF document text
    • http://xefujexomige.epizy.com/zemudebupomikenevewuwipip.pdfIn PDF document text
    • http://kiwozoma.epizy.com/bachelor_of_engineering_in_information_technology_subjects.pdfIn PDF document text
    • https://s3.amazonaws.com/tabobujimo/jaxivox.pdfIn PDF document text
    • https://s3.amazonaws.com/kizugokofo/obesidad_trastorno_alimenticio.pdfIn PDF document text
    • https://s3.amazonaws.com/sirilagewuga/bad_company_movie_in_tamil.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_off0000f494.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF494 5832 bytes
SHA-256: 3811acc9050985baffbc0dba86b4bf6c64274e287ab2d1228005e68bd7fa8843
font_01_sfnt_off00010864.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10864 10912 bytes
SHA-256: 56d58782fc4c7870415619db481633d2941adc64da2b86ba95ba8ce1585d9464

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