Malicious PDF — malware analysis report

Static analysis result for SHA-256 78bd42028b8ef7de…

MALICIOUS

PDF

80.9 KB Created: 2021-03-13 17:27:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 07ee94aafbca9901f6604f829cef4dba SHA-1: f3eef0a4819b71a7af537c12a03d45cff3e41615 SHA-256: 78bd42028b8ef7de978dece3ced24378c5eb6848e76e9321ab3a13785defeb99
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many of which point to domains associated with link farms and potentially malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. The embedded URLs suggest an attempt to redirect the user to a compromised or malicious website.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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
  • 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://jottigo.ru/wb?keyword=flow%20of%20heat%20class%207%20questions%20and%20answers PDF link annotation
    • https://cdn.sqhk.co/dipimimimewi/ggfzNNu/25760278488.pdfIn PDF document text
    • https://cdn.sqhk.co/lovojekaboxi/igoxgjY/scp_6789_siren_head_game.pdfIn PDF document text
    • https://cdn.sqhk.co/rumomezojeku/cgg8hf2/veginuxobemuzujuxiw.pdfIn PDF document text
    • https://cdn.sqhk.co/sezelijimofi/G7ggWge/jazevewakafiw.pdfIn PDF document text
    • https://cdn.sqhk.co/gaxobenona/itiehad/60629967763.pdfIn PDF document text
    • https://cdn.sqhk.co/govonesed/NrOZihq/missing_person_search_techniques.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/jadere/jokunusimitetudarawajibo.pdfIn PDF document text
    • https://s3.amazonaws.com/bokofapig/68367275192.pdfIn PDF document text
    • https://s3.amazonaws.com/zumomasugipeno/tagojenijamise.pdfIn PDF document text
    • https://a121017b-3fb3-450c-9156-48dd71a9bf80.filesusr.com/ugd/07625c_e586457b4280417087cced9e0d87aa79.pdf?index=trueIn PDF document text
    • https://b5d51143-f34a-4a4f-9265-6917490cb775.filesusr.com/ugd/9f69bd_c8401bd456dc4371b7a943572db4a9a0.pdf?index=trueIn PDF document text
    • https://c4bedd8b-a3e9-4aa8-9751-a6fde4035b7e.filesusr.com/ugd/037f08_411f128e8c7d477181a3b3a68512a1de.pdf?index=trueIn PDF document text
    • https://97a45c9e-1ab5-462a-bfe2-fded34b9a8b9.filesusr.com/ugd/b50c55_23ec5b54901a49d78a319f5e46946744.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xeponodij/shaken_baby_syndrome_case_report.pdfIn PDF document text
    • https://21a67f6d-2aea-439f-a910-ed4feb6be009.filesusr.com/ugd/173616_646f90d75d0944bb8834d5143dd7975c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/boduxatavepe/sofilulowunovopuzom.pdfIn PDF document text
    • https://s3.amazonaws.com/zesixefe/lanewizenikubo.pdfIn PDF document text
    • https://s3.amazonaws.com/xalasawu/28437829107.pdfIn PDF document text
    • https://4b5f4e46-8b81-4257-bf39-61fc08ba57b0.filesusr.com/ugd/7ea8bb_67eeb908ce6b4d2bbe5f6a56dedd45b7.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gezejoputiwinu/65729509219.pdfIn PDF document text
    • https://435a888a-8f80-410d-aa77-77edd6e4491d.filesusr.com/ugd/51fec0_febf5870568c4fd2bf0279cf49ad9ce0.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zepifudoxapo/3764150382.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_off0000f0f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0F3 5244 bytes
SHA-256: 9f0223afc9f397bffb5321a133aebc4e1c92d82c702436812d9875eb9b418379
font_01_sfnt_off000102d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102D1 10852 bytes
SHA-256: b7daef8181ba32b247a9caf1d6334a7367b30a03a432d78f271f99445e17348d
font_02_sfnt_off000127bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127BD 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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