Malicious PDF — malware analysis report

Static analysis result for SHA-256 df58996b1c56ed3b…

MALICIOUS

PDF

68.2 KB Created: 2020-11-11 11:57:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 116ef09ff6bde402d75710dfb873e64b SHA-1: 23f6831986e9a822c6c579d08a036065ef0a6530 SHA-256: df58996b1c56ed3b79bdde2165caf5fe5e20254a40439eb20336d155604a6aea
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?keyword=why+race+matters+pdf+levin PDF link annotation
    • https://rijizego.weebly.com/uploads/1/3/0/7/130776487/zabezone.pdfIn PDF document text
    • https://lebotuzipum.weebly.com/uploads/1/3/4/5/134519329/5095302.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376374/normal_5f97b4ab5d650.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417531/normal_5f9610aba7eb3.pdfIn PDF document text
    • https://rosuxemu.weebly.com/uploads/1/3/0/7/130776582/4062930.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410679/normal_5f941973d0ecd.pdfIn PDF document text
    • https://boxolajabamofi.weebly.com/uploads/1/3/4/3/134356625/salaxajabona.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366331/normal_5f8712bba61a5.pdfIn PDF document text
    • https://gozofuma.weebly.com/uploads/1/3/0/8/130874065/kebizine.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385412/normal_5f98a1e09430c.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/ffa53787-cf0c-4418-96a4-461b7c5dabfe/fuvisogumow.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e06260bb-6500-468f-9500-acf2e20b9735/sap_sd_interview_questions_and_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/91e493ca-38c2-486e-a446-3e888942a3b0/22325884658.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5fb68bbc-fb8f-45ae-91fe-12a5083bcb5d/samsung_rugby_4_release_date.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/076d01da-2e52-4a07-ad59-99830a74d141/kujazumupotisojorodikodap.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ca85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA85 5572 bytes
SHA-256: 2ffae2abe7d71cb6b3158759e811ac28bef2f5ce53589da267936506f977d39a
font_01_sfnt_off0000dd61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD61 11384 bytes
SHA-256: d01e5ac8c0a03765369d04af00ae2a76ad4429100cf03a7d9502b8fb8fc3ee41

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