Malicious PDF — malware analysis report

Static analysis result for SHA-256 460d9d77878ef700…

MALICIOUS

PDF

71.7 KB Created: 2021-01-03 17:18:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 3880cbc7badfff75f45e71ee06893b57 SHA-1: 1e9068b3c4cfc18de8701b342d2cc4c1c256595e SHA-256: 460d9d77878ef700ddfc279edc13a012825063822b68c270865f1beb26638590
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded URLs pointing to redirectors and a link farm, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK and PDF_SEO_LINK_FARM heuristics. ClamAV also detected it as Pdf.Phishing.Trojan. The presence of these elements strongly suggests a malicious intent, likely for phishing or SEO abuse, rather than legitimate document content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://traffmen.ru/123?utm_term=ancient+greece+map+activity+answers In PDF document text
    • https://cdn.sqhk.co/ditetona/iMdjhhf/refegexuwemubaxekina.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389104/normal_5fed76521d376.pdfIn PDF document text
    • https://cdn.sqhk.co/fawabanof/L4Thj4S/zumilapelezameniti.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445731/normal_5fbe9c03e74d1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366620/normal_5fdbb5f9e6ad3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450889/normal_5fb2d89fdaea0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393503/normal_5fa34c71bf547.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403263/normal_5fdbd25dacd00.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490265/normal_5fc8ceebcbd42.pdfIn PDF document text
    • https://satizivuzaked.weebly.com/uploads/1/3/4/3/134383512/332311dd7bab9f.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/90597999-c428-446a-be27-ed6dc8a5e308/87073811809.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/39471335-40cf-46fd-9316-39ba018f2aae/61883188047.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/74797b49-8230-416c-abf6-c0322ef4b1cf/modupowekin.pdfIn PDF document text
    • https://s3.amazonaws.com/fexuror/77708579194.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a0f55fee-2ba7-48fc-9de5-284eb5f59a4c/93357524415.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/39d20983-22d9-4bbc-9beb-be0aefe8f0c6/zurotuj.pdfIn PDF document text
    • https://s3.amazonaws.com/wejuvono/19406304400.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 4

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_off0000dc7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC7F 5464 bytes
SHA-256: af371a882c9487d55f960b48bc93f23ff14771d9c5ec54c49085ad799b7fa77c
font_01_sfnt_off0000ef1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF1D 10132 bytes
SHA-256: 5e5f45e6a321aae9f6e995a8f3a278029d14dc6aff30cde538ec837a6c530161

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