Malicious PDF — malware analysis report

Static analysis result for SHA-256 b64118b29bbd6a4d…

MALICIOUS

PDF

82.7 KB Created: 2020-11-13 05:34:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: a062c6f5747f30e9eca7163e1b609437 SHA-1: bc826d0d28aacfedcbeca801ce5da77de84e5324 SHA-256: b64118b29bbd6a4d3f13279e1587bd82ef626e3be2b0ec855440124fed5a03c5
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded links, with at least one pointing to known malicious redirector infrastructure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest it's designed to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://cctraff.ru/123?utm_term=inter-act+14th+edition+free+pdf In PDF document text
    • https://lugilabujenubo.weebly.com/uploads/1/3/4/3/134320616/23430d6ac.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379498/normal_5f9070a2468d4.pdfIn PDF document text
    • https://mepafuxutare.weebly.com/uploads/1/3/4/6/134660934/sakitivezilike.pdfIn PDF document text
    • https://noxetetejiv.weebly.com/uploads/1/3/4/3/134391164/8056773.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375518/normal_5fa5599b09dcd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426815/normal_5f9f2f44d5ae1.pdfIn PDF document text
    • https://pimetagedipimop.weebly.com/uploads/1/3/1/6/131636886/maresukugegokajuza.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407988/normal_5f980482d67db.pdfIn PDF document text
    • https://zulatikuwa.weebly.com/uploads/1/3/0/7/130776211/jirewapul_vilirafaxapu_rimofewekuw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420756/normal_5fa74051eef35.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/xifabilejilab/pixizawekunamejiwelix.pdfIn PDF document text
    • https://s3.amazonaws.com/bawalidamovidud/tempur_pedic_tp8000_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/davawina/theme_of_the_jade_peony.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_off0000eb0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB0E 7844 bytes
SHA-256: 58644daa77ca5f0a0dc4510c19c32cbf3ab4a47308a9d95dbea40cde0c780754
font_01_sfnt_off0001053d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1053D 5144 bytes
SHA-256: 78c1c6b1b9f337f79166ed56cc4090e9698b0168fbe6aed6663a2e5bbc04f7c0
font_02_sfnt_off000116c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116C3 11564 bytes
SHA-256: 9f95d82431ac9c0750bd01e12f05224f51eb59566f03ef98defc73d38a0da0fe

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