Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2866144c0e98dce…

MALICIOUS

PDF

70.4 KB Created: 2020-11-13 12:46:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: babef349297d03fa61f19bb7b3cea839 SHA-1: 97918985b18578745d8e52045867eede185b52a6 SHA-256: b2866144c0e98dce51d574a8819bd18d428735bd1bf5a78ff7c29a344f1a2402
214 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 0.9995

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
  • 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.
  • 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://ggtraff.ru/strik?utm_term=dallas+county+iowa+clerk+of+courts In PDF document text
    • https://zolefixu.weebly.com/uploads/1/3/4/4/134432518/7980104.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372358/normal_5f8e0fd830f65.pdfIn PDF document text
    • https://tavumake.weebly.com/uploads/1/3/2/7/132740551/b99b8d7f0cc01.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/91af3971-2fdf-4f3b-be4a-c5cb2a251965/71996460321.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c0e5d2bb-f94a-486c-8bfd-cd96ad15a1f3/93420164390.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bbe59687-6e1a-4475-b7b1-8cf5c96eb061/roblox_song_id_codes_for_royal_high.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f5756f0d-ddc8-4608-9a31-55428b65ed1e/wabowadopusigapedil.pdfIn PDF document text
    • https://s3.amazonaws.com/besafefaf/32754906785.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a20c482-0389-4476-999a-316b308be64b/86100083440.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b4a98613-4e14-4c29-893d-d59d3721e6f7/siposebevepamumusax.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_off0000c82e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC82E 5016 bytes
SHA-256: 2be354cf6534a81b78db0c78bcf6d606fe87b37f3b454fb379f6bcb19a327c3c
font_01_sfnt_off0000d961.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD961 11044 bytes
SHA-256: a2ca9ce6b6198d8c8bc5937cf7da977923a586e5c3d6993b68bf17e8b0f24989
font_02_sfnt_off0000fefa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEFA 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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