Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce01b37c00805082…

MALICIOUS

PDF

77.2 KB Created: 2020-12-28 02:58:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 00069e16ca0d68a191c08b5b20148322 SHA-1: b4f1b37c10077fb263d40bb4d7e5304006aff08c SHA-256: ce01b37c00805082eac1c9067b7a6cbb0a99034530c69d55a409e7c98bcf9ce5
214 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, indicating an attempt to lead the user to harmful content. The heuristic firings confirm the presence of malicious redirector links and a link farm, suggesting a phishing or scam attempt. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document, likely delivered via spearphishing.

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://traffmen.ru/123?utm_term=happy+valley+middle+school+supply+list In PDF document text
    • https://cdn-cms.f-static.net/uploads/4414495/normal_5f9d9b1af3301.pdfIn PDF document text
    • https://pimetagedipimop.weebly.com/uploads/1/3/1/6/131636886/191477.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393759/normal_5f91e50b865b8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366331/normal_5f9e3176220bd.pdfIn PDF document text
    • https://cdn.sqhk.co/mepetiruzi/hishdgd/45397777708.pdfIn PDF document text
    • https://vorenamu.weebly.com/uploads/1/3/4/2/134265490/3601187.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380882/normal_5f937beed3a63.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470409/normal_5fe832b1c8544.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/mewezekilafef/29079176195.pdfIn PDF document text
    • https://s3.amazonaws.com/tubupejevomo/managerial_report_writing.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/35bdf71a-81a9-436d-898b-6000a989e8bd/besajebinada.pdfIn PDF document text
    • https://s3.amazonaws.com/jixeremipet/china_capital_markets_reform.pdfIn PDF document text
    • https://s3.amazonaws.com/xubifupi/tetarofupanuwitato.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_off0000e1ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1BA 5116 bytes
SHA-256: 47863880cb3d3076ce5c1ad351cf251aafaa13741a871866da99453b9f3856da
font_01_sfnt_off0000f331.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF331 11412 bytes
SHA-256: 59024700d90281e4bc91a9d1eb06b56da52f11ec53263074b75224867e7bd276
font_02_sfnt_off000119c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119C0 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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