Malicious PDF — malware analysis report

Static analysis result for SHA-256 cec8e404bd8485f0…

MALICIOUS

PDF

81.1 KB Created: 2021-04-20 08:57:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 61d2d838ca8f0854dddbb0bd5fc4efa7 SHA-1: 59472beebe68e45752390de4943e361a39a24f22 SHA-256: cec8e404bd8485f0bf7a1966cb9dd34327e9a792443c395c0127df16df76c38e
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 0.9992

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://botokaw.ru/strik?utm_term=the+lottery+pdf+full PDF link annotation
    • http://kind-insta.site/soundarya_lahari_telugu_free_downloade905a.pdfIn PDF document text
    • http://moneymaya.site/55920306728d0kzh.pdfIn PDF document text
    • http://tevfikyuce.xyz/when_breath_becomes_air_online_buyznbt3.pdfIn PDF document text
    • http://esclub.pro/south_africa_visa_application_form_dha-_846n0cq.pdfIn PDF document text
    • http://allieshouseofhope.com/being_in_love_osho_download58uyn.pdfIn PDF document text
    • https://fatagodudun.weebly.com/uploads/1/3/4/3/134327877/7361735.pdfIn PDF document text
    • http://4d-5d.com/gmhba_silver_extras0iksq.pdfIn PDF document text
    • http://cancandance.org/285932755hbku2.pdfIn PDF document text
    • http://yoptan.space/991572444303ix57.pdfIn PDF document text
    • http://winoorama.website/how_to_solve_the_rubiks_cube_in_5_easy_stepshszvp.pdfIn PDF document text
    • http://fastnoutservice.ru/red_itchy_burning_spots_on_facedm79v.pdfIn PDF document text
    • http://wspring.space/636028497374hk97.pdfIn PDF document text
    • http://saudiautoinsurance.com/87183764546pja4k.pdfIn PDF document text
    • https://gawenowufiwozup.weebly.com/uploads/1/3/1/3/131383543/762125.pdfIn PDF document text
    • http://bcpzonasegur4viabcp.com/48226805944rpjpl.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/tafogusegabomu/logitech_f710_controller.pdfIn PDF document text
    • https://s3.amazonaws.com/mesotodimus/2988279795.pdfIn PDF document text
    • https://s3.amazonaws.com/zolerazowubow/what_is_terrorism_law.pdfIn PDF document text
    • https://s3.amazonaws.com/tubukeganuji/libro_la_anatomia_de_los_sueos_gratis.pdfIn PDF document text
    • https://s3.amazonaws.com/datarofapakil/theory_of_relativity_definition_for_dummies.pdfIn PDF document text
    • https://s3.amazonaws.com/bogeguva/us_army_reserve_pay_scale_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/robumuduluwise/lotus_elise_buyers_guide_s2.pdfIn PDF document text
    • https://s3.amazonaws.com/turip/13299022310.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f2ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2FF 4520 bytes
SHA-256: 5ed13148651af9d7d92b709f2c7f64c0f47a14cef164fb7207ea3917ae3fc452
font_01_sfnt_off0001027f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1027F 11476 bytes
SHA-256: 7ac2595e809b0b520effb86346c2af4f1cbc87068d3cb5ec655c51cbf26e822f
font_02_sfnt_off0001293e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1293E 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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