Malicious PDF — malware analysis report

Static analysis result for SHA-256 fbd8eb203677d68a…

MALICIOUS

PDF

63.7 KB Created: 2020-11-28 08:44:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 88a8f6af5d96912ffe8042b495b69e7d SHA-1: 2c6073d8a0e73003db92428dc87de7f357f32f15 SHA-256: fbd8eb203677d68a48f1884cd5eb7048ed5fd9e78790fd168523e7106dd25e7e
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://traffset.ru/aws?utm_term=xamarin+android+sdk+manager+visual+studio+2017 PDF link annotation
    • https://fixumimudojuzu.weebly.com/uploads/1/3/4/6/134607797/3ed079.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/506c5c0d-c01d-48fc-a1b7-0d777a959f88/12938837880.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files2/ruxuretiwonowoposasipiwo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c69ef45-cdaf-429a-acc2-2ee1cb215f07/the_creation_of_patriarchy_summary.pdfIn PDF document text
    • https://s3.amazonaws.com/gosete/patatinewagawolure.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/138931ab-53b6-44fd-a349-6b2256d4995a/zazomizefiboman.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxadol/pofovobiwopulawalis.pdfIn PDF document text
    • https://s3.amazonaws.com/tunenijexe/9272626660.pdfIn PDF document text
    • https://s3.amazonaws.com/memul/nelakek.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/694f3d8e-fbb6-4782-ad47-2f1855a21093/tezedugunepexar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a084aedd-9863-4f9b-ad0f-f282cbbef9e4/jojo_rabbit_full_movie_online_free_putlockers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a7155eec-1c90-443e-a699-c095948f8e98/93322375260.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_off0000ba9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA9F 5652 bytes
SHA-256: c7264bbabd93d06612e530c92afa51240bf7dffe91218813326d1c546cbfd739
font_01_sfnt_off0000cdd0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDD0 10608 bytes
SHA-256: 1c4eb065d8bdd86f1d6503e11c9a976441c0760c88f24107afa1dce63b911349

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