Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c72899ddec03ea6…

MALICIOUS

PDF

74.5 KB Created: 2021-03-15 08:00:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 302387fbc29faaaeae0cba5dcea55c76 SHA-1: 189b10dd4de7bd3c7bddc06009bc02a011f09adc SHA-256: 7c72899ddec03ea699d6d7a2752aba394841d382a640b3f20cc33e2789b4fb15
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9993

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://soxebez.ru/award?keyword=only+pdf+input+file PDF link annotation
    • http://birebap.scienceontheweb.net/kreepy_krauly_great_white_parts_diagram.pdfIn PDF document text
    • http://figupatofewox.iblogger.org/povam.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470029/normal_6000adab81ecb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380522/normal_600f954d42b98.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384647/normal_6007ec66524b4.pdfIn PDF document text
    • http://fuxezaboxekave.scienceontheweb.net/whats_another_word_for_touch_base.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475000/normal_602474d4cd998.pdfIn PDF document text
    • http://nosumiva.mywebcommunity.org/the_book_of_abramelin_the_mage_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424025/normal_60242e834f261.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://muzezal.rf.gd/android_assets_file_object.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ea719d0-1d04-4478-9b5d-a12c498d193d/7570043422.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f66e09e-2e93-4514-9259-3e04976f9a63/programa_de_honores_ala_bandera_para_bachillerato.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/49e02d60-0234-437a-900e-331cb2030916/nileremusugelufapi.pdfIn PDF document text
    • http://faxanudof.epizy.com/koparamigomibijom.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/004c8e2b-f7c6-4609-b058-6823df242ce1/9992624581.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e641213d-3090-4385-93fb-09c736a52a14/breville_crazy_scoops_ice_cream_maker_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/74a6fe03-1bf0-4c2d-948e-2fc60b5f592a/do_you_have_to_flip_meat_on_george_foreman_grill.pdfIn PDF document text
    • http://vivizegijarugip.epizy.com/business_card_maker_creator_premium_apk.pdfIn PDF document text
    • http://lugopupi.rf.gd/tagizefelafumagetiwijana.pdfIn PDF document text
    • http://kunaraxanoxun.epizy.com/xexamulojave.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fa9b543c-ca07-44d4-bc25-683cbcc22aa5/lalis.pdfIn PDF document text
    • http://sorajapiliwixod.rf.gd/email_asking_for_contact_information.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e638418-19b1-4b8f-a9b2-520a0624882d/can_you_share_a_on_facebook.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_off0000e669.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE669 4680 bytes
SHA-256: 54fb9bbb287cc9fe00fbe4e21925bce9adc5d366ff4d9497d4eaf2ec7cf7fc15
font_01_sfnt_off0000f678.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF678 11288 bytes
SHA-256: b21f15c9f8c09c0c66be4a668d5a191d483e049a401215d51637ae816d6ca8ad

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