Malicious PDF — malware analysis report

Static analysis result for SHA-256 5dc6d98ee69160d5…

MALICIOUS

PDF

100.1 KB Created: 2021-03-19 03:43:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: fb0ac7cf6d8ca32b8bbd3c25afef64de SHA-1: 9683535232d5880308707ff2f7e366156c1a6025 SHA-256: 5dc6d98ee69160d5b2978ff7e290ad0e7e60961fd48129fbd76673975b7ed9ad
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 0.9997

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 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://zajinet.ru/strik?utm_term=metal+gear+solid+5+ground+zeroes+achievement+guide+and+roadmap PDF link annotation
    • http://bukejasinopa.22web.org/buffalo_wings_and_rings_franchise_information.pdfIn PDF document text
    • http://bilapak.66ghz.com/cisco_academy_exam_answers_chapter_2.pdfIn PDF document text
    • http://daimontimur.org/litupitijoxosajijemnkn.pdfIn PDF document text
    • http://good-production11.site/40922264498out4y.pdfIn PDF document text
    • http://uspehdnyaaxyz.xyz/barfi_full_movie_with_english_subtitdc3f4.pdfIn PDF document text
    • http://sbrf.link/forrest_fenns_treasure_location_confirmed6xjyy.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fatugogav.rf.gd/raymarine_e80_firmware_update.pdfIn PDF document text
    • http://funazowo.rf.gd/siwiwegir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f6ee99c-3bd5-4b65-b4f6-e7711aae33e1/how_to_set_up_your_teeter_inversion_table.pdfIn PDF document text
    • http://sanukut.rf.gd/adobe_reader_full_version_free_download.pdfIn PDF document text
    • http://vomematomeze.epizy.com/hotels_with_jacuzzi_in_room_near_washington_dc.pdfIn PDF document text
    • https://s3.amazonaws.com/metubevozisul/loduk.pdfIn PDF document text
    • http://fereralud.epizy.com/java_freshers_interview_questions_and_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/510c5543-380f-480b-a2bf-813ad6b704c2/olympus_om2n_light_meter.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/65781153-92c2-42e6-bd08-b3978e09f74c/17547608683.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/808eed80-8bb5-4bf8-a828-1455c346dd22/jojo_part_7_release_date.pdfIn PDF document text
    • https://s3.amazonaws.com/tamovagag/integers_powers_and_roots_worksheets_grade_7.pdfIn PDF document text
    • https://s3.amazonaws.com/jagux/best_android_phone_2019_sim_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b54a163d-83bd-4878-89b8-29c3b597fa89/80368765093.pdfIn PDF document text
    • https://s3.amazonaws.com/bejeseja/nusokusuxopetu.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_off000148cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x148CB 5724 bytes
SHA-256: 46d8987481c75dc6e04b733b0a13f50319945c08cff49e0d7a3556acf9b2fdf7
font_01_sfnt_off00015c3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15C3D 11112 bytes
SHA-256: 94985de87f65f9477d58dfa0a22380af04097e7f0fa23a5f2b3e5be71a4adf46

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