Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e4f4375739073a1…

MALICIOUS

PDF

79.2 KB Created: 2021-03-11 06:36:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 0fe59d9c754757487faae768488d1517 SHA-1: 0290e8b125fe96ea2c0425de58850a1c94ba5a1c SHA-256: 2e4f4375739073a1155b9caf755bdd841ab57f9cea45e9b5ade7476b532d7f8c
126 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external URLs, with several pointing to disposable domains and identified as part of a link farm, suggesting a phishing or malware distribution scheme. The PDF's structure and embedded URIs are consistent with attempts to redirect users to malicious sites.

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://xajibur.ru/award?keyword=receptores+de+angiotensina+2+pdf PDF link annotation
    • http://babobekoru.66ghz.com/68768345388.pdfIn PDF document text
    • http://takipleskazan.org/nofasoyjyor.pdfIn PDF document text
    • http://tourist.fish/benefipibasidesusiptk5i.pdfIn PDF document text
    • http://salopkisa.website/toberetinesofuso8hg1g.pdfIn PDF document text
    • http://lidlid.xyz/1862340772xhn90.pdfIn PDF document text
    • http://bbflowers.net/metro_2033_review_ps4l169j.pdfIn PDF document text
    • http://the-job.ru/dofesematafapa31fd6.pdfIn PDF document text
    • http://artyom.guru/great_by_choice_chapter_6_summaryd7s14.pdfIn PDF document text
    • http://you-bestshop.xyz/crafting_and_executing_strategy_conceptsj76ai.pdfIn PDF document text
    • http://lasns.fun/35243745vdmgu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4487381/normal_5fe56d89508e6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366311/normal_602f5f7388bde.pdfIn PDF document text
    • http://trynon.xyz/annamacharya_video_songs9hsum.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485939/normal_6015816d7096b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383806/normal_5fe81207f0b6a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392650/normal_5ff922b5b533a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://6c71f620-b6e5-46cc-9e58-526c5f0a7a41.filesusr.com/ugd/1c90dc_dddffb804e74426bb2ab8d73ef73d9fc.pdf?index=trueIn PDF document text
    • http://puvuvijafu.rf.gd/26616338154.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/78c4575a-f5dc-449a-a8b9-0fed97909c2b/how_to_delete_dvr_recordings_on_verizon_fios.pdfIn PDF document text
    • https://8c56b32b-3398-45d6-9c0b-b55146621f16.filesusr.com/ugd/6924eb_a9828680a8ac4411ae50f15e56731359.pdf?index=trueIn PDF document text
    • https://994180ce-385f-4272-9833-4a204a825e0f.filesusr.com/ugd/ec0c41_0fa47134f8624a5a8f17155a42c2e98f.pdf?index=trueIn PDF document text
    • https://eb62986f-0112-409a-9ebe-777412bc5c19.filesusr.com/ugd/26938b_1598ce1079e742469d4855eb28511cb1.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/87cc93db-ddcd-4a85-8dc6-f163afa0bca3/is_samsung_5_series_n5300_a_smart_tv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/574410ed-d174-4aa5-803c-8f2862498dc8/baketaranodot.pdfIn PDF document text
    • https://e86c6366-0652-46cb-9e1f-5633a133dba9.filesusr.com/ugd/510a18_f0b9872688fa4fba94fb387ac192e1ab.pdf?index=trueIn 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_off0000f36d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF36D 5428 bytes
SHA-256: 0fdb2da68eb2254261dfbb7b873057458f17d98b735c1c390bac1bf49559aa7d
font_01_sfnt_off000105f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105F7 12508 bytes
SHA-256: 6e5415927def74f3e94287791831aa08e42bef97eceb4694e97bfaf2174d9065

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