Malicious PDF — malware analysis report

Static analysis result for SHA-256 db9e7b1b47f5bf78…

MALICIOUS

PDF

82.2 KB Created: 2021-03-16 10:06:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 1026be3c9e29dcc0c53a2678c5e60506 SHA-1: 22a61cd9e240465a3ae4b54c736c1890bc112e55 SHA-256: db9e7b1b47f5bf78a3f056e50f6c412f42eaa23b629b253e09badf6ed0b10fa7
156 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, with heuristics indicating it contains a mass external PDF link farm. The primary malicious URL identified is 'https://lozipotod.ru/award?keyword=introduction+to+analytic+philosophy+pdf', which is likely used to host phishing content or distribute further malware. While no scripts were directly extracted, the PDF structure and the presence of numerous external links suggest an attempt to redirect users to malicious sites, aligning with phishing or malware delivery tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://lozipotod.ru/award?keyword=introduction+to+analytic+philosophy+pdf PDF link annotation
    • https://cdn.sqhk.co/tiruxugajo/cjoifge/junior_football_gloves_size_guide.pdfIn PDF document text
    • https://cdn.sqhk.co/dadakafopina/cgeCihT/best_good_night_stickers_for_whatsapp.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://s3.amazonaws.com/rumezo/gejusube.pdfIn PDF document text
    • https://87c8fc71-818b-4167-bf0d-2ac3bc49ffd1.filesusr.com/ugd/f9d4cd_05c58750028b4749b66b2daec419faa8.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zifozujiwi/gonodatuk.pdfIn PDF document text
    • https://s3.amazonaws.com/xurixado/coelom_formation_in_frog.pdfIn PDF document text
    • https://s3.amazonaws.com/wifiduxezo/akkada_chinnavada_naa_songs.pdfIn PDF document text
    • https://f3c4034a-4a94-4c47-b6c5-0445626d7bf8.filesusr.com/ugd/655f09_831be14d37f54c34988c45e0c5bf59b2.pdf?index=trueIn PDF document text
    • https://da99f664-88c7-4a27-98aa-0bbcec2e8f57.filesusr.com/ugd/66f3f9_2aa96d48ba4145f6b5d41b2ebab49b75.pdf?index=trueIn PDF document text
    • https://be1d055c-b83b-422e-9e68-1bf13cef350c.filesusr.com/ugd/5b1e3c_3af849a9d64b4e23ab4a6a8b52305568.pdf?index=trueIn PDF document text
    • https://c33c3ce4-fa2f-4f19-9477-7a801b41b29e.filesusr.com/ugd/ebbcbd_c221a0dfe2004b988ea2c555ad2bb05c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bipepezuwed/aqa_gcse_physics_equation_sheet_2018.pdfIn PDF document text
    • https://587b455d-cc79-4428-8e80-a8b75ce23bca.filesusr.com/ugd/021ec8_93ea9e6f5ecf455786de8ed720f78d54.pdf?index=trueIn PDF document text
    • https://237a2310-9536-43ad-add1-fe73b840a51a.filesusr.com/ugd/8b319d_a13bf181cda84e34a01fa66fab3fc756.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/mejigavukolu/tempstar_furnace_model_number_decoder.pdfIn PDF document text
    • https://s3.amazonaws.com/bufexa/pizef.pdfIn PDF document text
    • https://s3.amazonaws.com/pevuwarobuvowa/creditors_for_expenses_in_balance_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/najubu/los_angeles_county_property_assessment_information_system.pdfIn PDF document text
    • https://54179944-c6a3-49b3-9462-5d1939b6aff2.filesusr.com/ugd/49f5ef_d25068d7e5f1448f8ec1023d987b9852.pdf?index=trueIn PDF document text
    • https://37bdae34-bb2f-403f-997c-54a7c09d9c06.filesusr.com/ugd/dc98cc_5c999550138e4fd0aaf72abe533b2de5.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f6e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6E0 5048 bytes
SHA-256: 739b9faf36b2d38242823e0fedf48c1dd0644286fa117afaac81c171526db9b2
font_01_sfnt_off000107f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107F6 10940 bytes
SHA-256: 73c7f56f7a6fc5d6b99788711cba6c99cc242bf791be362077b990788863551d
font_02_sfnt_off00012cea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CEA 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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