Malicious PDF — malware analysis report

Static analysis result for SHA-256 208b9e5ee79bb1c8…

MALICIOUS

PDF

72.3 KB Created: 2020-11-16 19:23:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 248627e4e00d9ff13df4b7f0d68556e4 SHA-1: d9e44a72028f1f5cfc895ccb47848a16e09ae62b SHA-256: 208b9e5ee79bb1c8af8e987e266e033d05fb26fe181be82dd69e698b993625b4
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 0.9997

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/123?utm_term=fedora+vs+trilby PDF link annotation
    • https://woluxivevarot.weebly.com/uploads/1/3/4/6/134672831/47aff6fb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366340/normal_5fb0305529c06.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370525/normal_5f897865080a1.pdfIn PDF document text
    • https://vejuvofarazaxar.weebly.com/uploads/1/3/4/3/134355137/8297098.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445320/normal_5fa9e6fce9a82.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382773/normal_5f90655440f60.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://uploads.strikinglycdn.com/files/5cef4067-e8ec-404a-a231-17a51fe619c7/27213759210.pdfIn PDF document text
    • https://s3.amazonaws.com/fotepopunaj/balobekoro.pdfIn PDF document text
    • https://s3.amazonaws.com/bulozor/69229005205.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/503844b4-13fa-43b4-9180-7112062e4e3f/rovamuruzaridu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/71337f87-cea9-42f0-a013-44f0bbd569b6/shameless_us_script.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_off0000d2ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2EC 4756 bytes
SHA-256: 4f7a3394a79dc4a4838c3e3d0b28f154773dc152bc50cda6a9b650d14de192fe
font_01_sfnt_off0000e32f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE32F 10456 bytes
SHA-256: 1d987da418a79b3309fa262599c8a6fb3cb5470b24412c632ae465a39b9ba4a3
font_02_sfnt_off000106fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106FD 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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