Malicious PDF — malware analysis report

Static analysis result for SHA-256 71ac075f583f1909…

MALICIOUS

PDF

90.5 KB Created: 2020-11-20 18:13:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 018da0e3caee9aabe582521dd08d29f5 SHA-1: 9fd60cbc3971ba052cc56d06c14740298d7f7f92 SHA-256: 71ac075f583f1909b14b69d1200b86162ca81e603f47e4b9e1404c75df191510
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded links, with a critical heuristic firing indicating it points to known malicious redirector infrastructure. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were extracted, the presence of numerous external links, including one to a suspicious domain, indicates a likely attempt to redirect users to malicious content, potentially for phishing or malware distribution.

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
  • 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/123?utm_term=ruger+%25231+scope+rings In PDF document text
    • https://jatorogerujew.weebly.com/uploads/1/3/2/7/132710569/a63fb.pdfIn PDF document text
    • https://zazivepug.weebly.com/uploads/1/3/4/3/134359823/6710645.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/75d6cb9c-417c-4e8e-acf8-91bf4dfd2756/22083227580.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb10e06b-7e81-4e34-a604-48f60728f9e3/municipal_solid_waste_management.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/45d8a4f2-9534-4851-ae8e-e6dc10f0e54a/domigaxogunibebabo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a72f2dd9-59a7-4c3c-bff8-339d6054fd4f/22937086823.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/466d533a-6484-48fd-8a42-cc30c4786984/fiworanesig.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e3eff15b-2189-4ebd-a92e-ec16175cc615/juegos_de_ratchet_y_clank_para_pc.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b87feb5-f8b1-446f-a04d-7ecab00ad000/63897980332.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b724246b-0e82-47fb-80d2-59b867dac3e4/16328020705.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fce1f5a0-7b8e-458f-a76d-f74540ba4617/grande_ford_parts_san_antonio.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f394c59c-a6a9-4844-9880-be239a05e36e/49041991995.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7446bbd5-f2e4-4b78-bacf-2032050526cf/90232736470.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d182fe96-c1c4-486a-87c2-8c2a8a1a1bfc/fesolutuwofopediz.pdfIn PDF document text
    • https://s3.amazonaws.com/wutezigojuxi/69296187437.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/beb5b39d-f1e4-45df-904b-4f86c7447e24/doradutogolufobovivudone.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_off00012416.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12416 4432 bytes
SHA-256: c0db0483001a3233e087fbd99e39b9fb4e6e8cb2fcd039dc79572559544ddc63
font_01_sfnt_off0001333b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1333B 12248 bytes
SHA-256: 69f87499c6dee17c207b256b0235be5e769a010d0f9fa3b8dd6d22cdd6e638e6

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