Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0588f2e34f1884b…

MALICIOUS

PDF

63.7 KB Created: 2020-11-18 05:39:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 95a877fe3d2269edc054cd26faec9385 SHA-1: 16b1407ba6977f4130302214a4ec455b46177dd0 SHA-256: b0588f2e34f1884b65fb2c60176cbe361aed5abbd97652f759d4ba6d4efea4ed
156 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9998

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://traffnew.ru/123?utm_term=lyme+disease+map+united+states PDF link annotation
    • https://fofevupug.weebly.com/uploads/1/3/4/4/134490210/124a1ecef.pdfIn PDF document text
    • https://kexuminuki.weebly.com/uploads/1/3/4/3/134310960/6933814.pdfIn PDF document text
    • https://lakiromepokina.weebly.com/uploads/1/3/4/5/134589127/4464530.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad550fca-0ed6-43e3-b239-65a3c1ff1bab/xazewipifodozubomo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/08b35df0-97b2-4b7a-9e98-fd8bc5d23017/98064643027.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bff433d0-b97c-43cd-bd1e-59c60d3f42f4/31131470253.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d842b980-1414-47c6-ba97-e9c5d9553875/70544012359.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9afe469e-6c4b-48c7-8713-ffdf2d138959/52448707486.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad6e36e5-ecb7-4d68-a2b7-e8e68e1355fd/suworogejapadoniwawigo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac2bb2d0-8628-4ab5-84c5-2bc835f41cd5/65496993105.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4ec822cd-747c-4673-a964-c6bdbfa3b267/7932422.pdfIn PDF document text
    • https://s3.amazonaws.com/baposivarabuj/citi_belmont_report_quiz_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/jasadavebaga/gilumoluxawodopos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1583b118-dd4d-4ca6-b1d9-ecfbbe83c602/xiwalarimox.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_off0000bea5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBEA5 5020 bytes
SHA-256: 105fe0d2c95adae11843148a84c30c3b4e58b9c5a16e5e187750a2a9e586a74b
font_01_sfnt_off0000cfb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFB8 10148 bytes
SHA-256: 5f634287387d773b06275d2ea61b1ca6bb37ac781057ee5c0d3825a32236eae5

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