Malicious PDF — malware analysis report

Static analysis result for SHA-256 29ae2b6f3dd4e7ef…

MALICIOUS

PDF

73.4 KB Created: 2021-03-29 03:37:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 227d14a0b5b7d65a87393145778c8ec6 SHA-1: edf4477b08d00d0b3bf223daa5829ae5c5e03761 SHA-256: 29ae2b6f3dd4e7ef24c27a47119ba52a15d1b9f088c705fbeed67a9ca4bc4934
244 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 and routes users through malicious redirector infrastructure. 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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/award?keyword=social+media+marketing+plan+sample+pdf In PDF document text
    • https://static.s123-cdn-static.com/uploads/4380525/normal_5ffe6f02f3fce.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403270/normal_6032bdc71612b.pdfIn PDF document text
    • http://revershjtb.site/71347510912j8k6u.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370547/normal_60159bb78546d.pdfIn PDF document text
    • http://znasila.ru/479337364829trdp.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450160/normal_6018616ea70d1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417808/normal_5fc850c88d595.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410016/normal_60258abc0676e.pdfIn PDF document text
    • http://milanomoda-italy.site/pulowikazimotaboluwodmi6hh.pdfIn PDF document text
    • http://banquepopulaire-fr.org/book_folding_templatesyjeqi.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://s3.amazonaws.com/dosipive/densidad_g_ml_a_kg_l.pdfIn PDF document text
    • https://s3.amazonaws.com/jadere/jqgrid_number_formatter.pdfIn PDF document text
    • https://a001dc82-f31e-4944-9b76-0a8e602b6855.filesusr.com/ugd/e4ee87_0a396956bdb247afb853f842d887bb72.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lorifumofelu/10376100883.pdfIn PDF document text
    • https://78fa80b2-8629-447b-ad63-53e91e8d4948.filesusr.com/ugd/8f02de_5df7af436031475da332829bdd0966c3.pdf?index=trueIn PDF document text
    • https://952d9f4b-853a-4e85-af28-23c4d489d487.filesusr.com/ugd/8db125_c4c0f49907b14d5caaf358b8f0e5c979.pdf?index=trueIn 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_off0000d5aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5AA 5428 bytes
SHA-256: 327ea693e2c4376bf3e74f68dea6af45d2b4ce0980e8fec24c68743c3d16f62a
font_01_sfnt_off0000e7f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7F5 9988 bytes
SHA-256: 77caf2dd080978f5d55fc0a80f08dccafde01797464b557e6d23583be0c0b36c
font_02_sfnt_off000109f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109F6 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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