Malicious PDF — malware analysis report

Static analysis result for SHA-256 c75444a7441931b6…

MALICIOUS

PDF

75.3 KB Created: 2021-04-01 02:44:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: b9509c17d592bc7487ac4dbed49ea15e SHA-1: 82c7abaa7cb91bcd1268e57d5b45e4ac83793ead SHA-256: c75444a7441931b61a628c50e2944ad731017218c9d73d499fa33559c4810533
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-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://xezojetit.ru/123?utm_term=sogc+guidelines+abnormal+pap PDF link annotation
    • http://vofanepukasur.22web.org/binimelegakazunuximuban.pdfIn PDF document text
    • http://guwaxata.iblogger.org/zibuzinubuneg.pdfIn PDF document text
    • http://trenketo.buzz/1923871150207nzl.pdfIn PDF document text
    • http://tokio-2020.fun/wosomop93f81.pdfIn PDF document text
    • http://nisiwitas.22web.org/woruridezujonopa.pdfIn PDF document text
    • http://sweetmeet.online/xexalovekokot4untw.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sonogobujajeva.rf.gd/761412413.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a91dbd21-c431-4ede-8ad6-7d73509b9d15/which_books_are_in_the_catholic_bible.pdfIn PDF document text
    • http://naxudafaxe.epizy.com/37346655942.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/65cd1da3-4230-494d-9474-265a3b433892/que_quiere_decir_ceir_los_lomos_en_la_biblia.pdfIn PDF document text
    • http://fevidubigozexa.rf.gd/clack_water_softener_error_codes.pdfIn PDF document text
    • http://gametasixomuk.epizy.com/fill_in_the_blanks_with_appropriate_words.pdfIn PDF document text
    • http://zakidudo.epizy.com/cellulase_enzyme_assay.pdfIn PDF document text
    • http://kitalanexu.epizy.com/74713315600.pdfIn PDF document text
    • http://zividovapajawuv.epizy.com/relion_ultima_test_strips_discontinued.pdfIn PDF document text
    • http://zimogaz.epizy.com/mau_c_o_form_aj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e6f81b5a-e3c3-47bf-b511-e60d44410c46/how_to_learn_logic_pro.pdfIn PDF document text
    • http://bunopudo.rf.gd/4453662409.pdfIn PDF document text
    • http://dozazorixogope.epizy.com/sap_payroll_process.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e75495c4-543b-478c-960b-0316e9ddc30f/polk_magnifi_max_review_cnet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9a9844b7-58f3-429a-93a0-28bf09b2689e/83298963694.pdfIn PDF document text
    • http://besaware.epizy.com/driving_performance_evaluation_score_sheet_california_meaning.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e8da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8DA 5636 bytes
SHA-256: 0070d9b671ff757d92f0b7cfb166de051c2da7d9c8b7d448776bdc9686b3ea6a
font_01_sfnt_off0000fbf1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBF1 10648 bytes
SHA-256: f1a38622219258a4542fca10f27e1968dc30cc414ee35ac59a156677b2710baa

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