Malicious PDF — malware analysis report

Static analysis result for SHA-256 dbc6a6ffb97d1e61…

MALICIOUS

PDF

70.0 KB Created: 2021-03-20 17:22:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: e0013b30430b95f9d7a4c558c5e24ccb SHA-1: 10c2bc6a5b08a7722e5893c25e4ba855bee3340e SHA-256: dbc6a6ffb97d1e6144579386d2c748bb5efb8d64a73beb73245c1100b091ee72
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9996

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 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://lozipotod.ru/award?keyword=audio+amplifier+design+handbook+pdf PDF link annotation
    • http://rigojakivuvemi.iblogger.org/android_10_oneplus_7_pro_update.pdfIn PDF document text
    • https://cdn.sqhk.co/norowitidot/ihHBhjO/75630714590.pdfIn PDF document text
    • http://lifizix.22web.org/nutis.pdfIn PDF document text
    • https://cdn.sqhk.co/luwokiseg/gjdjbzB/vivi_bubble_tea_popcorn_chicken_calories.pdfIn PDF document text
    • https://cdn.sqhk.co/ledodatefu/zhczUg5/teachers_union_laredo_texas.pdfIn PDF document text
    • https://cdn.sqhk.co/besimiwi/cjhGMFH/pejojezovabekajap.pdfIn PDF document text
    • https://cdn.sqhk.co/xurajalijok/jeOehcH/tiktok_songs_lyrics_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/lilokimoz/gehakje/plagiarism_checker_turnitin_free_full_version.pdfIn PDF document text
    • https://cdn.sqhk.co/pegatorapo/djhifjc/ivry_hall_montgomery_advertiser.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/19f68fdd-6b1d-4112-978b-9261dade9623/weber_7130_grill_cover_for_weber_genesis_ii__genesis_300_series_gas_grills.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/16a0c856-07c6-4caa-8cc2-b5d89b0c58da/59838532820.pdfIn PDF document text
    • http://mevediruzorapaz.rf.gd/87409957656.pdfIn PDF document text
    • http://fubefav.rf.gd/allyn_and_bacon_guide_to_writing_7th_edition_free.pdfIn PDF document text
    • http://weboxezave.epizy.com/sumiwarenatulatuj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f874364b-13ef-4c08-8473-00764e1e3757/giwuti.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4651d3da-5b43-4ce8-a951-6d26c5cb1b05/bamari.pdfIn PDF document text
    • http://wowimes.epizy.com/singular_possessive_noun_worksheets_for_2nd_grade.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f7a770c0-4dfe-4f20-9d3f-d5f227f57faa/goxulus.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d74a0eed-7e67-40b9-938f-fe4550eaef97/omron_model_hem-711dlx_manual.pdfIn PDF document text
    • http://ralorepozariti.rf.gd/math_operations_key_words_worksheet.pdfIn PDF document text
    • http://gofosuxubajo.epizy.com/webcompanion._ui._appcore._services._installer_service.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_off0000d2b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2B6 5648 bytes
SHA-256: b96a1578caab4225e014f76137ab94210771b7539c6c1dbd7187c034373e9fed
font_01_sfnt_off0000e5c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5C0 11340 bytes
SHA-256: 006fd9784d375028e7b1f8879521ff7ef17ed89dc30e45aa58dac4756c862c7e

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