Malicious PDF — malware analysis report

Static analysis result for SHA-256 e43ce6a198156695…

MALICIOUS

PDF

74.8 KB Created: 2021-03-16 04:24:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 34e5285a6d8d2b058d40848c8c549698 SHA-1: 8f146bcf7a71df6006395745b335cbb675df63a1 SHA-256: e43ce6a198156695da77f63e9f01bd6c03133676ceb94cf07793decbeac1287f
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 0.9998

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://jacksth.ru/123?utm_term=cheerleader+official+video+by+pentatonix PDF link annotation
    • https://cdn.sqhk.co/savageven/gjjhijb/duddu_my_virtual_pet_dinheiro_infinito.pdfIn PDF document text
    • https://zukodefikarux.weebly.com/uploads/1/3/4/4/134498552/5250195.pdfIn PDF document text
    • https://xovobinawulum.weebly.com/uploads/1/3/4/8/134883327/2489de61fd.pdfIn PDF document text
    • https://cdn.sqhk.co/xojelumegasi/HfhiiiR/4299107235.pdfIn PDF document text
    • http://bixekakazozerol.mywebcommunity.org/75005934488.pdfIn PDF document text
    • http://bodaweziwov.mypressonline.com/hp_officejet_4500_driver_for_mac.pdfIn PDF document text
    • https://cdn.sqhk.co/laxegipo/iguhjp3/final_heroes_guide.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/fonazuzixagizir/65830711269.pdfIn PDF document text
    • https://s3.amazonaws.com/mokixetat/sufaxuzevolava.pdfIn PDF document text
    • https://s3.amazonaws.com/webipejonavuv/connect_italian_avanti_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/daraniwekamidir/standard_of_excellence_book_1_flute_minuet.pdfIn PDF document text
    • https://s3.amazonaws.com/besafefaf/dell_precision_m4600_owners_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/dotivaf/chale_aana_pagalworld._io.pdfIn PDF document text
    • https://s3.amazonaws.com/gavapozalilup/90123098969.pdfIn PDF document text
    • https://s3.amazonaws.com/fonibinaraj/vifegufadumofekid.pdfIn PDF document text
    • http://tososite.onlinewebshop.net/how_to_fix_a_craftsman_air_compressor.pdfIn PDF document text
    • https://s3.amazonaws.com/zasepo/madame_bovary_movie_review_2014.pdfIn PDF document text
    • https://s3.amazonaws.com/kagedatabujo/lifojidavidu.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_off0000cfef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFEF 5340 bytes
SHA-256: 15a82579c771b622e418895e634f8c0f91e2ac630870e5980bffb4e36992bd06
font_01_sfnt_off0000e21e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE21E 11432 bytes
SHA-256: d4d94a3ac42d4276dd53126d0f8f5d01359d268cec703bcff65951f5e2b8638d
font_02_sfnt_off00010881.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10881 16140 bytes
SHA-256: 1ffca1ef16be5e2ec436e77f9211a88ad3199dc781cb76600401cc2e2c7dce6d

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