Malicious PDF — malware analysis report

Static analysis result for SHA-256 ffb0d7c83d3e4479…

MALICIOUS

PDF

76.4 KB Created: 2021-04-23 05:32:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 9d1460816efb6e4970ca6a15867957fd SHA-1: 177623a6a02804e91f3e4a37c82a4c87c45a30f7 SHA-256: ffb0d7c83d3e44792faad1d853ee0c62a4066b7109ab5dc8bc8a863e3a826ae1
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://pelibifir.ru/strik?utm_term=avaya+2420+digital+telephone+manual PDF link annotation
    • https://cdn.sqhk.co/dedizozife/ggcPEcW/stack_on_gun_safe_manual.pdfIn PDF document text
    • http://premiumpornclips.com/kivizutamatadoluvid7g4vu.pdfIn PDF document text
    • http://espaceabonne.com/20407461821npfgs.pdfIn PDF document text
    • http://bilkaita.space/raghuvaran_b_tech_movie_hdswk6k.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480414/normal_5ffca2dcc4d1d.pdfIn PDF document text
    • https://cdn.sqhk.co/busibelifiv/fhihkjd/mountain_bike_pedals_best.pdfIn PDF document text
    • https://cdn.sqhk.co/sowuwinadapu/7qQ4geV/the_irishman_parents_guide.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383446/normal_5ff65496b279a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448744/normal_60111efc5cfd5.pdfIn PDF document text
    • http://juxowupekabaf.mygamesonline.org/rixonutebekufu.pdfIn PDF document text
    • http://fosireditoj.mygamesonline.org/how_to_program_suddenlink_remote_to_tcl_tv.pdfIn PDF document text
    • http://ladyso.ru/black_and_decker_20v_lithium_cordless_trimmerro4h4.pdfIn PDF document text
    • http://kifisafobubupo.mygamesonline.org/kitaxedovawapek.pdfIn PDF document text
    • http://nariwunuzaw.scienceontheweb.net/apologize_one_republic_partition_piano.pdfIn PDF document text
    • https://cdn.sqhk.co/bimolixumotu/3jhSzsv/telehealth_definition_wikipedia.pdfIn PDF document text
    • http://fetedeju.mygamesonline.org/inside_bureaucracy.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424007/normal_5ff34dbef4142.pdfIn PDF document text
    • http://pidawudimo.scienceontheweb.net/tikefojifewewuregapaka.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/3a5e13f5-66e9-4e25-8f81-ba84381a816a/90652415335.pdfIn PDF document text
    • http://palexibibiw.atwebpages.com/javanese_english_dictionary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/21a34975-5568-4330-8f76-f8c2560a317f/33645500555.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f8c36fad-97c6-4a01-89a5-fbfe87ccab0b/18537090374.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_off0000ed82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED82 5612 bytes
SHA-256: b1ec63e55b6e96e5603074a63d4a95457f4809fefc6ac96a76a12cf3b90c9797
font_01_sfnt_off00010095.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10095 10356 bytes
SHA-256: 21a1083134db640e590a4e2dec4725adb7037332ca33b8a4bb687f9051d37a70

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