Malicious PDF — malware analysis report

Static analysis result for SHA-256 996dbb64e78a261f…

MALICIOUS

PDF

85.7 KB Created: 2021-03-10 09:29:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: b6a2d9acae525e5eefe9e8cc882c1165 SHA-1: f415fbdc178b8bcc241d85630ff3044c615620fe SHA-256: 996dbb64e78a261fd5d3a85851aa8a2af67569690452df89be899eb0da1e4d1b
126 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains an embedded URI pointing to 'botokaw.ru', which is likely a malicious domain used for further exploitation. The document body, though heavily obfuscated, appears to reference a book title, suggesting a social engineering lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://botokaw.ru/strik?utm_term=artemis+fowl+the+atlantis+complex PDF link annotation
    • http://premiumpornclips.com/circuitos_amplificadores_de_audio_para_armar4zlmo.pdfIn PDF document text
    • http://instasale.company/what_do_you_mean_by_patriotism_how_can_you_show_your_patriotism4micd.pdfIn PDF document text
    • http://fringigejy.site/tefapevaygm.pdfIn PDF document text
    • http://look-hotel.com/chess_rush_guide_combokwy7h.pdfIn PDF document text
    • http://vidclips.design/a_writers_reference_9th_edition_ebookmxbr2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/3f3e9e89-49a1-48d5-ae1b-074a216b1c66/calories_in_dominos_small_cheese_burst_pizza.pdfIn PDF document text
    • https://s3.amazonaws.com/jaxesabi/librecad_dwg_ffnen.pdfIn PDF document text
    • https://57eba762-b826-4879-8d7a-7f480aba2934.filesusr.com/ugd/e89c2b_0c5ae28b72244d0fb219437d41b7bee7.pdf?index=trueIn PDF document text
    • http://bevivose.rf.gd/33279469729.pdfIn PDF document text
    • https://s3.amazonaws.com/wizidimawag/anaphylaxis_epipen_guidelines.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cff0de89-6ca1-4562-a660-a53e349a051c/xagapojusiga.pdfIn PDF document text
    • https://368af19b-b9be-4417-8ea7-dfc4611f9fec.filesusr.com/ugd/abd4c0_fa1a097052eb43e4b713f942d4f81dfc.pdf?index=trueIn PDF document text
    • https://2ddc7431-ff91-46e9-9708-195efd6cc195.filesusr.com/ugd/ffe0d3_cfb922d7db864bf3a1d486355920f030.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/e4d358b5-6182-4e1c-af6a-fef8f63e5e49/buruto.pdfIn PDF document text
    • http://zufabilo.rf.gd/kapixovawak.pdfIn PDF document text
    • https://07e0a16e-b77d-475b-b724-88bbaedb347c.filesusr.com/ugd/8e9e2f_610695fd7efe42bba28067186bcd54a0.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bisazabe/guigang_weather_report.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e4f5c87a-e12c-43ae-a87f-ba0286569d3d/86438825893.pdfIn PDF document text
    • https://737bf953-b780-43bc-8af0-312ed5328a40.filesusr.com/ugd/017c44_95e6563c60134e0896ae8cfb80374f11.pdf?index=trueIn PDF document text
    • https://d5aacb37-8766-4234-9cc8-c2ec3b911aba.filesusr.com/ugd/1e723b_ff76a29e1ecc4f13bdf89e9c2679dab4.pdf?index=trueIn PDF document text
    • https://569961a5-e6b5-462d-8b38-7193d5e7b20b.filesusr.com/ugd/a37a2e_6b7d5313d13744698028bb99c8404107.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/66454969-b0c5-4490-a7c8-d45224f82dbb/53736585067.pdfIn PDF document text
    • http://fenetidataj.rf.gd/sodixebubuka.pdfIn PDF document text
    • http://gelulunex.epizy.com/the_alienist_season_3_tnt.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010283.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10283 5192 bytes
SHA-256: 69ed7f71a1005a567d6551d6354593e412134a9a2abf07a44d0482e6009f06a4
font_01_sfnt_off0001140a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1140A 11580 bytes
SHA-256: febc129661cc7dac70f1bee407baad6f9ae457edc9098d2a5a20eac6e847a0ab
font_02_sfnt_off00013aaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13AAA 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c