Malicious PDF — malware analysis report

Static analysis result for SHA-256 cbf050828f229864…

MALICIOUS

PDF

71.2 KB Created: 2021-04-22 01:02:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 6d954d7184e31e6a009cdc127d68a516 SHA-1: e909efc24badfe61f417fb5c6e25d9b0e1f9ddd3 SHA-256: cbf050828f229864ed697787e6737234348cde5715ed938598495299a5bae15b
156 Risk Score

Malware Insights

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

The file was detected as malicious by multiple heuristics, including ClamAV and an ML classifier, and contains a large number of external links. The primary external link, 'https://pelibifir.ru/strik?utm_term=juegos+del+hombre+ara%25C3%25B1a+en+moto+y8', suggests a lure related to online games, potentially leading to phishing or further malware. The PDF structure and embedded links are indicative of a link farm or phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://pelibifir.ru/strik?utm_term=juegos+del+hombre+ara%25C3%25B1a+en+moto+y8 PDF link annotation
    • https://tumuzisokume.weebly.com/uploads/1/3/5/3/135351536/0087603d.pdfIn PDF document text
    • https://cdn.sqhk.co/woselukafo/zpPigOK/30994686865.pdfIn PDF document text
    • https://dowozazufexu.weebly.com/uploads/1/3/4/6/134606261/difolaxa-risele-kobonevefamo-xexafutemi.pdfIn PDF document text
    • https://cdn.sqhk.co/xorudonox/ihitiai/y_intercept_form_to_standard_form_worksheet.pdfIn PDF document text
    • https://busekedogipu.weebly.com/uploads/1/3/1/4/131454033/c9766dda10ab.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/73ce7ddf-a890-45e1-bc5a-ef9dea108842/rijonuloku.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc68be7b-e26c-4c13-9b77-f24d6640da6e/rangers_apprentice_the_royal_ranger_4.pdfIn PDF document text
    • https://s3.amazonaws.com/xonaxevetaf/dummy_admit_card_2020.pdfIn PDF document text
    • https://s3.amazonaws.com/fadedosi/27226239709.pdfIn PDF document text
    • https://s3.amazonaws.com/wufujudisu/clariant_chemicals_india_ltd_annual_report_2018.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/268a6020-3ecc-45d8-bbca-f1e42ce416a0/feregefitevew.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/debaac9f-d7b9-4e9b-9fc8-7f174dfdd15d/gunademuwopofusu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0813f594-3957-411c-b14d-190c6f96cd91/73857395216.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/522a7b57-ea92-4c72-bcb5-0b92de575fb0/what_channel_is_fox_on_directv_today.pdfIn PDF document text
    • https://s3.amazonaws.com/julaxel/android_studio_install_ubuntu_16._04.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/229ee25b-4962-4b4f-91e5-b12f050bd36c/witcher_netflix_season_2_vesemir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c11fe691-6186-4d52-b4b9-0378901a41ea/ernest_hemingway_museum_key_west_florida.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8b1489e3-b9f5-4572-b3df-f700186058db/what_does_it_mean_when_a_pension_plan_is_fully_funded.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6c5ae245-3ef1-4612-afcd-56646c1d4587/gm_socrates_help_desk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fc31c090-ecea-4c0a-8cf4-b605e7bd716d/2458780134.pdfIn PDF document text
    • https://s3.amazonaws.com/lososimap/bafibafexes.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_off0000d50d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD50D 5876 bytes
SHA-256: 9d9707ab8d21a2ef67c3568c01bfaaea51f178f75c3859e9f5808de686bc3559
font_01_sfnt_off0000e893.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE893 11252 bytes
SHA-256: 31a0b2652a92a8d5f2f82750a98e47d6a8bf6d8844ad7c7e674b4109ba843abf

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