Malicious PDF — malware analysis report

Static analysis result for SHA-256 04ff50107bf74591…

MALICIOUS

PDF

80.4 KB Created: 2021-03-11 03:08:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 2bb08f98d873bd98d25a5d1f2b4e1969 SHA-1: bca25d88fd0a50a0fcf8a732f790f936266b9d55 SHA-256: 04ff50107bf74591f4cabd9c2a77ba678a143d79383ecec3cca787f35ee61b58
156 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 a large number of external links, suggesting a link farm designed to direct users to potentially malicious websites. The presence of embedded URLs and the 'PDF_SEO_LINK_FARM' heuristic strongly support this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://gimoguvi.ru/wix?keyword=vision+2020+conference+oprah PDF link annotation
    • https://zapineri.weebly.com/uploads/1/3/4/7/134707132/xusobogujukop-ziguriganunepu-nofamovifip.pdfIn PDF document text
    • https://nopewiviguzine.weebly.com/uploads/1/3/1/1/131164125/62b08.pdfIn PDF document text
    • http://sumagezemorewo.22web.org/solidworks_2018_system_requirements.pdfIn PDF document text
    • https://berajodisi.weebly.com/uploads/1/3/4/6/134651265/kijewemonobuxem.pdfIn PDF document text
    • http://wavarev.22web.org/pukipezajemivaturuliluzoj.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/1773fbb8-4656-4f0f-9f78-f4df1a23e70e/nofagajedekaraginagunejo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/16c7b496-c655-465d-8b1b-90885c67f43b/gemuga.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/83637780-59e8-4744-8c14-c5a055532d4d/resevaralujajaxajugetu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9a9e5d98-6f9f-4bcc-af85-477309268e9d/52206338086.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/df9883c9-320a-455e-8231-3d229bc84e82/tableau_training_for_beginners_part_2.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e8718cfb-a3cd-4ad1-9979-3df19cc0f058/69774194127.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a18527c2-e548-495d-9526-7d0f062dbbb1/black_blues_guitarist_from_texas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d7e2a02-9f01-4520-908e-df28e81176c3/93599753875.pdfIn PDF document text
    • http://sidogin.epizy.com/biological_anthropology_agustin_fuentes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b359e17f-9dee-48d0-bf68-cf367ed6535b/sunbeam_steam_master_iron_temperatures.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7dfa2762-3f6d-4d87-8d42-24997cfc1622/18767028762.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c7b744c-d275-4fd5-9911-004548d5a7fd/seafloor_spreading_is_occurring_at_the_boundary_between_the.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2f18fff3-eb69-45a8-905b-01af435e85ca/49393015111.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e75881e3-b164-4b6e-b534-7b5e2c12d897/blood_angels_codex_supplement.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/53ade1f1-261f-4176-a0b7-609da04bb108/what_is_a_1973_ford_mustang_mach_1_worth.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_off0000f200.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF200 5020 bytes
SHA-256: ca2f588e8a61d0fd776e62536b0dec1528f645ff0aff10e78498531d0225cde1
font_01_sfnt_off000102f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102F6 10380 bytes
SHA-256: 3b0cbbe4fd66c0291815e825b7f7f6e955be0cd9498121614c54bd62ad0ac1b9
font_02_sfnt_off0001266c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1266C 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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