Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ecf745132eb6112…

MALICIOUS

PDF

41.6 KB Created: 2020-11-06 20:45:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 0bc2a41e81a66b807ba74536748f2fe8 SHA-1: d6db6666afe09df4d46411c386322a2cc24b9562 SHA-256: 3ecf745132eb61129c9309028e5452fdafb3511a111075c1d29fa574e8476552
66 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 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 1.0000

Heuristics 4

  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://traffking.ru/123?keyword=there+are+some+data+after+payload+data+7+zip PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4389387/normal_5fa18c8b004bc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://pokavewizux.files.wordpress.com/2020/11/59291350974.pdfIn PDF document text
    • https://xubewinuvi.files.wordpress.com/2020/11/46228771611.pdfIn PDF document text
    • https://xelinatuki.files.wordpress.com/2020/11/12873235441.pdfIn PDF document text
    • https://lodoxepal.files.wordpress.com/2020/11/reremuradivuvevedivogobid.pdfIn PDF document text
    • https://s3.amazonaws.com/jenisozazewubo/vometemetamafikujegoju.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff10d752-ae65-43ad-b34e-caf4771c7894/conan_exiles_jungle_map.pdfIn PDF document text
    • https://s3.amazonaws.com/sazixipame/towanumufagorijif.pdfIn PDF document text
    • https://s3.amazonaws.com/lefemijip/sasofaxagoranoxajutiwasus.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b7cd9d21-b700-4757-b64d-502926f4a53e/3221932852.pdfIn PDF document text
    • https://manetomimexa.files.wordpress.com/2020/11/lugotorizereziwatogukomak.pdfIn PDF document text
    • https://dogisur.files.wordpress.com/2020/11/nabozageguxa.pdfIn PDF document text
    • https://botebofeji.files.wordpress.com/2020/11/15963812645.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_off00006495.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6495 5464 bytes
SHA-256: 97200e3ac8380d0b37a4c6e3f0c82deeab22ea69fb3dc07fac2c79dce95283c6
font_01_sfnt_off00007715.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7715 9936 bytes
SHA-256: 4ae763367e7b48cd463029b6c9de51de45bb0f22788ce53b3ecd0f26111a2d38

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