Malicious PDF — malware analysis report

Static analysis result for SHA-256 209ef25c54c5d6c0…

MALICIOUS

PDF

76.7 KB Created: 2021-03-05 04:37:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: d93cc2c9a5156326b710bfe1f45217e0 SHA-1: 781ac6ef176c75b6b946dcccc94da74a56296b8a SHA-256: 209ef25c54c5d6c07bf982063d485a62c2cc542207784a333fd93a698a5a9f39
156 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains a large number of external links, many of which are likely part of a link farm designed to manipulate search engine results or direct users to malicious sites. The primary malicious URL identified is dugedepap.ru.

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://dugedepap.ru/wix?keyword=palm+desert+charter+middle+school+boundaries PDF link annotation
    • https://pudorexejuvaw.weebly.com/uploads/1/3/1/4/131455832/4f2c6e.pdfIn PDF document text
    • https://tukumexof.weebly.com/uploads/1/3/4/7/134721389/d0f1ea7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389361/normal_602284a301435.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466679/normal_602308c16e2e0.pdfIn PDF document text
    • https://geridaradekod.weebly.com/uploads/1/3/1/4/131437552/2248431.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/dotivaf/calendar_template_school_year_2018-_19.pdfIn PDF document text
    • https://4ad55601-b8ab-4ae0-bc0e-e90069072326.filesusr.com/ugd/3aca14_03b6b48d84a14607a7e3cde0c3e1deae.pdf?index=trueIn PDF document text
    • https://98771922-91e4-4673-aa0d-7794f4435593.filesusr.com/ugd/b6aaa0_656791ff34ee498b84ec16cab78eae29.pdf?index=trueIn PDF document text
    • https://f7cac2f2-528f-490f-9bef-cb2448a877de.filesusr.com/ugd/529ba0_87f5c5cc71d5413da64dd58d4a5cf6b2.pdf?index=trueIn PDF document text
    • https://45b0b119-5f8c-43e7-b437-4e12d17c1c81.filesusr.com/ugd/3826db_8ff310e6fe1c4283a5da90021dca5e37.pdf?index=trueIn PDF document text
    • http://levurugagizov.rf.gd/relationship_red_flags_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/fifuto/tennessee_williams_night_of_the_iguana_poem.pdfIn PDF document text
    • https://s3.amazonaws.com/bokexizometun/acid_reflux_dietary_guidelines.pdfIn PDF document text
    • https://3e3188f7-d9e9-48da-9af6-4e6760718ee0.filesusr.com/ugd/4f7562_e00fbe5ed574459c9b8336751e47ac5f.pdf?index=trueIn PDF document text
    • https://c3373aeb-ed74-4f2d-b631-fa679e0a3f6f.filesusr.com/ugd/cbe7f7_8e4337ce85124f99bf4f5eb29dc545f4.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/geraromu/gemevoxijomodudugi.pdfIn PDF document text
    • https://5a1138df-423b-4a5d-a7c7-36223740754e.filesusr.com/ugd/a72fa8_9796fbb98cf8462fac3df45e2f9d1715.pdf?index=trueIn PDF document text
    • http://funijapubuf.rf.gd/37243427565.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eef0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEF0 5320 bytes
SHA-256: 67e35af2e507e34cef950de5d36ef5bf705289145ac9d4a7ea32fb04e672a0f1
font_01_sfnt_off000100d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100D8 10616 bytes
SHA-256: 59cf76ce46afb90a9cedb0e5c51b7281968e869cc3e979422838e283d888dba8

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