Malicious PDF — malware analysis report

Static analysis result for SHA-256 570e9143e9c2ae49…

MALICIOUS

PDF

84.7 KB Created: 2021-02-26 06:45:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 89184609a405db5b0ab7169f46d567ac SHA-1: 346ba069d76a4a8b00fe23d41bc2f13f20c4bbc6 SHA-256: 570e9143e9c2ae49f62995ed8f5767cf9b693486fe7786968552a457081aaeb9
184 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with at least one pointing to known malicious redirector infrastructure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were extracted, the PDF structure and embedded URLs suggest an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/wix?keyword=bmw+318i+manual+transmission+engine In PDF document text
    • http://sujabupinoda.scienceontheweb.net/25098627368.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392650/normal_5fd6965835c17.pdfIn PDF document text
    • http://lomigakorak.getenjoyment.net/what_elements_can_potassium_bond_with.pdfIn PDF document text
    • http://ruluzuzadol.mypressonline.com/how_to_start_an_observation_paper.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421937/normal_5fe4e2ffa688e.pdfIn PDF document text
    • http://wogivodugakovek.mygamesonline.org/redad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368752/normal_5fd711ce221e0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376612/normal_5fcc24c3057cb.pdfIn PDF document text
    • https://cdn.sqhk.co/pozusonitid/tMNiaid/max_express_delivery_service_kabul.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463803/normal_602ed560e8593.pdfIn PDF document text
    • http://tezibif.mygamesonline.org/how_to_find_volume_of_a_cone_given_diameter_and_height.pdfIn PDF document text
    • http://xoxuvajes.mywebcommunity.org/where_can_i_purchase_the_book_of_enoch.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://faxanudof.epizy.com/brushback_pitch_informally.pdfIn PDF document text
    • https://s3.amazonaws.com/fasudikek/magento_2_email_template_array_variables.pdfIn PDF document text
    • http://keberefan.rf.gd/how_are_flood_basalt_formed.pdfIn PDF document text
    • http://soxixebupi.rf.gd/sesivipam.pdfIn PDF document text
    • http://zuputes.atwebpages.com/lomenebijataluwadelif.pdfIn PDF document text
    • https://s3.amazonaws.com/zonivezada/99823806440.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f03f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF03F 5556 bytes
SHA-256: 897b0a40aa59984ec9e4f13d293d912930a2075423e09c50e82e3d1636408809
font_01_sfnt_off00010321.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10321 13916 bytes
SHA-256: 4208f23df19ebf5154292e64f2d1399d35a62da7d64e7799b521daeb4635d81c
font_02_sfnt_off00012ecb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12ECB 16060 bytes
SHA-256: b10e7a0583bf6b216a5471aeed10f14210f1dda3adb60ac5169fcb38ba12e60c

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