Malicious PDF — malware analysis report

Static analysis result for SHA-256 ccf407b61f0e461e…

MALICIOUS

PDF

73.1 KB Created: 2020-11-24 17:41:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 09b87165c4f03e31945267555e848bd0 SHA-1: 19a2acedfe56131404f60f3543c571b0465ea198 SHA-256: ccf407b61f0e461e94379a6f3ead296498c474b8633ff9df8ec5c83c06044e96
164 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses an invoice-themed lure. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://traffnew.ru/123?utm_term=uber+driver+agreement PDF link annotation
    • https://sepenunaxob.weebly.com/uploads/1/3/0/7/130776074/visutelagusege.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4503692/normal_5fb2f5f00f744.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490930/normal_5fb9dd5493100.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404738/normal_5f9a6aed413c9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460247/normal_5fbc9aa20527e.pdfIn PDF document text
    • https://duroxogudoli.weebly.com/uploads/1/3/4/3/134318703/gokixalonisopu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404990/normal_5fa21f7c0656e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404310/normal_5fb71b998671e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368251/normal_5fb40e2421f63.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://uploads.strikinglycdn.com/files/b75a59c1-1935-4ba2-90f3-eb439c0275af/words_that_start_with_s_relating_to_music.pdfIn PDF document text
    • https://s3.amazonaws.com/kovilowab/nifenidegiwuneb.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cbf5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBF5 4804 bytes
SHA-256: d7fc6eff227f981f32f690aba6c0b29037ee5b92e0e7065eadda47495275988d
font_01_sfnt_off0000dc2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC2E 1800 bytes
SHA-256: 51ebeec29509b87aa858d500e37ac8853184703d07d1f913ce36d8e1dc7764c0
font_02_sfnt_off0000e4bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4BC 10588 bytes
SHA-256: 9a0fd212c0490d732c64656e89dc9fb11ae7e7f77bf2d142de36e0afd57bb3bc
font_03_sfnt_off000108f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108F1 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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