Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6c2c8284222ca9b…

MALICIOUS

PDF

65.2 KB Created: 2021-01-12 10:36:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: b6d9878b89e1d9987f33de85a3cb714d SHA-1: f1664f1eca45fd1aa9dc94deba0747cd73f542ef SHA-256: d6c2c8284222ca9b01261c31f13f564d24fc08923c37e9015ef4ff77df2f5c83
214 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, identified as a link farm, with one URL pointing to known malicious redirector infrastructure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the embedded links are the primary attack vector.

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://traffmen.ru/aws?utm_term=l+love+you+ringtone+free In PDF document text
    • https://cdn-cms.f-static.net/uploads/4370740/normal_5faa87ed64b85.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386073/normal_5fdb2c4be7355.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486775/normal_5fcbbb3f294e3.pdfIn PDF document text
    • https://peketavapi.weebly.com/uploads/1/3/4/3/134331612/xilogunot.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490364/normal_5fce86c49a654.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470692/normal_5fe13b6c21dfe.pdfIn PDF document text
    • https://tekoboxini.weebly.com/uploads/1/3/0/8/130814877/4317333.pdfIn PDF document text
    • https://zotolibufu.weebly.com/uploads/1/3/1/0/131069899/bepaxaxagud-tokorodezu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379722/normal_5fc23a672044c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367643/normal_5fab8c2d8fe3f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490528/normal_5ff15ec558cf3.pdfIn PDF document text
    • https://renudufodajofi.weebly.com/uploads/1/3/4/8/134884992/xadateme_ravuvuvivasovil_zepovid.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375541/normal_5fee530a3b81b.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/litunux/org._apache._spark._sql_jar.pdfIn PDF document text
    • https://s3.amazonaws.com/falevi/after_effect_crack_2017.pdfIn PDF document text
    • https://s3.amazonaws.com/fasanag/74574206506.pdfIn PDF document text
    • https://s3.amazonaws.com/gixawetopoli/kuxizapimaw.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c1f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC1F7 4652 bytes
SHA-256: 3a334dc2f2905169b4ea7d4d270ddd5becb89e748e9d9ce831129ed9971a8a00
font_01_sfnt_off0000d1f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1F5 10784 bytes
SHA-256: 968bd06aa3d6ecfb6912797aadb072134a2fb73be35e45ce064f2aefb508ef84

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