Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ba373b2790fc29e…

MALICIOUS

PDF

75.7 KB Created: 2021-06-07 00:12:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 0ef52839c22177c7c424585887bbd738 SHA-1: dc0cdfae2645cb635dc18d891daea1962b837003 SHA-256: 2ba373b2790fc29ed744f1f4fbbcde852059456fadaa78bcc401493497c8bf62
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 0.9991

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://ketchas.ru/pbw?utm_term=lyft+car+inspection+form+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4389354/normal_606ab69391698.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412778/normal_5fd0e2cd30b5a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424982/normal_6047bd7e48061.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489054/normal_600b201ec202a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454668/normal_6035310da686e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374181/normal_60357355ca2d3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366628/normal_5ffe6fd4bb8a6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475987/normal_6037bd263fbcb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408481/normal_60bd39be173f7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369901/normal_601bc7a9f0bd3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495837/normal_603189fa8351a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459482/normal_60b85957b388c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452169/normal_605a38ca32aeb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://minuwaxiper.pbworks.com/w/file/fetch/144516921/4th_class_maths_ncert_book_solution.pdfIn PDF document text
    • http://siseraxoru.pbworks.com/w/file/fetch/144678567/how_old_is_snow_whites_prince_charming.pdfIn PDF document text
    • http://jetubabup.pbworks.com/f/williams_obstetrics_24th_edition_download_free.pdfIn PDF document text
    • http://dajodovilav.pbworks.com/f/how_do_i_find_my_banks_routing_number_without_a_check.pdfIn PDF document text
    • http://vojewukejiwu.pbworks.com/f/driver_booster_7.1_pro_key_free.pdfIn PDF document text
    • http://jawegele.pbworks.com/w/file/fetch/144670317/33978966665.pdfIn PDF document text
    • http://xuruzinijub.pbworks.com/f/baudrillard_simulacra_and_simulation_disneyland.pdfIn PDF document text
    • http://kokoxudalux.pbworks.com/f/nasa_meteor_warning_2022.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0331df2d-d700-40ac-8865-224740ff4e36/25543559707.pdfIn PDF document text
    • http://mujusevo.pbworks.com/w/file/fetch/144479400/how_to_use_rpcs3_emulator_on_pc.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3042f0d1-3715-4cbd-8784-de74085e0fb3/fopawirewogekivizavesise.pdfIn PDF document text
    • http://rugewenuzed.pbworks.com/f/best_digital_marketing_campaigns_2019_uk.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_off0000eafc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAFC 5312 bytes
SHA-256: d76b9acc85b176a99c5ee762a4c2daad95365ab7f24e2880a22d6ba73c60e088
font_01_sfnt_off0000fd0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD0A 10764 bytes
SHA-256: 288b507d9e618536e8e40d6780912258eec9117c89fb4e4dcfea72f27b4a8243

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