Malicious PDF — malware analysis report

Static analysis result for SHA-256 57ee696f2e23236c…

MALICIOUS

PDF

78.3 KB Created: 2021-03-21 04:36:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 66efbcba04fe4d7faa4e0aac09c50844 SHA-1: 8239cfa7e800c81ce24353638f3430d6373a7a52 SHA-256: 57ee696f2e23236cbb89ac7ec4add9e284f5479187b7d827b6f837d92d829109
186 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 6

  • 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.
  • 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://dugedepap.ru/wix?keyword=nhl+14+teams PDF link annotation
    • https://cdn.sqhk.co/mofosalamo/qidjiQg/messenger_facebook_download_windows.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379237/normal_5ff1b7461a2a0.pdfIn PDF document text
    • http://wowitaly.pro/14697325167a66w0.pdfIn PDF document text
    • https://cdn.sqhk.co/dinigivo/geidgcL/polimixuxilojaxubazumu.pdfIn PDF document text
    • http://ch-redirect.icu/46950351790zie3o.pdfIn PDF document text
    • http://golosa-spasibo.ru/bikefudovobifudezefuburozwjbvm.pdfIn PDF document text
    • http://smeshnoykir.space/animal_farm_book_chapter_3_and_4_summaryh1v4u.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383798/normal_5feccbf8af3f5.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/929bb000-3b48-4d2a-a381-efb6a1c54724/briggs_and_stratton_parts_near_me.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4eafeb00-78d8-45d9-89c1-04260198a31d/when_should_a_relationship_become_facebook_official.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e6663439-6871-4e5f-99b6-e76ca0e0ca08/sibala.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e840f57e-ee0a-40bb-a178-1f1f166f5468/33479717560.pdfIn PDF document text
    • https://8d275f60-8e36-4e70-8574-b6d542a617c4.filesusr.com/ugd/dbf6c2_3eec9a64b30648bc8f15f161bfb9e333.pdf?index=trueIn PDF document text
    • https://9e269ae7-c3cf-4b9f-bde2-1d9be064b7bf.filesusr.com/ugd/139869_42c76b4d8f9543849368bec67a601861.pdf?index=trueIn PDF document text
    • https://37bcb4aa-7747-4ff6-a352-0e22bf983c21.filesusr.com/ugd/4393d3_f88482fcece64dc0b973b813196e92ba.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc732c59-fb01-488a-8392-a78d056bcf23/pablo_neruda_poems_in_malayalam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9acc2403-2cab-4845-8130-608ee2efc720/how_old_is_netgear_n600.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f954fdc2-8dc2-4931-9e13-5a7d6f73509b/40364452686.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_off0000f77f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF77F 4936 bytes
SHA-256: 221edc179e5984d1b28b8fe6751b7b1677643c12ab289f69b22e5c0650a183c8
font_01_sfnt_off00010830.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10830 10800 bytes
SHA-256: 81691543b9fff5552302f25ad9cce25fade07cbc17448ea59c5e3cdc9050b95b

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