Malicious PDF — malware analysis report

Static analysis result for SHA-256 fcbc8304ab91ed59…

MALICIOUS

PDF

74.9 KB Created: 2021-03-20 03:45:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 5942371275e1bc477ea91185b97b20c2 SHA-1: bdfff234ce9a75a5d8b57d29e7ff4d69091b7d54 SHA-256: fcbc8304ab91ed59a89e851ca123b063018eb8b322636f420d7c9bd35309d2b1
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://botokaw.ru/123?utm_term=sunderland+weather+report PDF link annotation
    • https://cdn.sqhk.co/lazujanaziri/jfgeSib/21327125702.pdfIn PDF document text
    • https://cdn.sqhk.co/tobamozusaj/Bhgptia/bizetibev.pdfIn PDF document text
    • http://xomerisupudegop.medianewsonline.com/fefoladukevut.pdfIn PDF document text
    • https://cdn.sqhk.co/nexetifosam/bjeVQjg/37607148813.pdfIn PDF document text
    • http://zuvalasit.mypressonline.com/subliminal_seduction_book_cover.pdfIn PDF document text
    • https://cdn.sqhk.co/menasimax/fibgesN/strategic_sales_plan_template.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://46b09160-81f9-4cb3-9cca-f7b5b0c0229e.filesusr.com/ugd/179cc6_21ca0c4fe7ba44248cd343904e1942d8.pdf?index=trueIn PDF document text
    • http://lazuletezofik.onlinewebshop.net/66860442705.pdfIn PDF document text
    • https://s3.amazonaws.com/fotojipifuzitul/64595905586.pdfIn PDF document text
    • https://s3.amazonaws.com/pegozegi/what_are_the_responsibilities_of_a_health_and_safety_committee.pdfIn PDF document text
    • https://e5b7f393-9b83-42c5-a877-5b85c0c772c8.filesusr.com/ugd/77b42d_28aabac80fb148a0b8a314ec2109c304.pdf?index=trueIn PDF document text
    • https://be56f97b-0727-4a8e-a141-4155b83e75ac.filesusr.com/ugd/5034d0_5483ced2d3664ed0ae69e6ce4d8a7150.pdf?index=trueIn PDF document text
    • https://63aa7d51-6c54-48cc-ac87-b710a0da19c3.filesusr.com/ugd/c8d394_0161f7380d984451b0274cc6a74036c7.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xomepixo/pencil_drawing_ideas_landscape.pdfIn PDF document text
    • https://85d2c5a2-fc31-4f76-86b4-4ebe2abe2bf4.filesusr.com/ugd/a8cc01_9a1dd0ce0a574a8cb833ab47a146d75d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kifutizijebuj/gebewuxizeritedal.pdfIn PDF document text
    • https://e9abb47e-19e5-4ec2-9f3c-2aa4e6f2bf0a.filesusr.com/ugd/92be99_77d69511c4dd4c69ab0e1712c68d8282.pdf?index=trueIn PDF document text
    • http://jekurur.atwebpages.com/10610877919.pdfIn PDF document text
    • https://s3.amazonaws.com/wewiro/8385249917.pdfIn PDF document text
    • https://s3.amazonaws.com/xuxifuzituwu/bodoni_mt_bold_italic_font_free.pdfIn PDF document text
    • https://9042e326-c85f-44e6-b9b6-0c206471fdba.filesusr.com/ugd/0d2fda_3142ceb5d2c34ce88b8896b98fda2553.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vexosafugunu/9276178618.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_off0000db0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB0B 4896 bytes
SHA-256: 276ad74333944aba6f15d2658440a32eb77952ca5fb38cb60a178d61488fa01c
font_01_sfnt_off0000ebae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBAE 10564 bytes
SHA-256: b4867880bb38cff593e71af8d3f56f9c11be8f4b2bf97636f55fba2216ec187a
font_02_sfnt_off00010ef3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EF3 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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