Malicious PDF — malware analysis report

Static analysis result for SHA-256 e351bde73dea2767…

MALICIOUS

PDF

76.8 KB Created: 2020-12-26 13:55:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 444e918a03c8fcac8aefdeb0080854ca SHA-1: e834fd81c63fbeb9d2da3ece19cb52bcebacc1cc SHA-256: e351bde73dea276742c9f463c0ddb5817dc88b65ce3e8c3d29ed191928ee5137
162 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a link to a known malicious redirector, identified by the 'PDF_MALICIOUS_REDIRECTOR_LINK' heuristic. The 'SE_INVOICE_LURE' heuristic suggests the document's content is designed to trick the user into clicking the malicious link. The ML classifier also strongly indicates maliciousness. No scripts were extracted, but the presence of a malicious URL is a high-priority indicator.

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.
  • 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
  • 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://ggtraff.ru/aws?utm_term=microstrip+coplanar+waveguide+pcb In PDF document text
    • https://cdn-cms.f-static.net/uploads/4418381/normal_5fa8e762391f6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444875/normal_5fa1183e7bf91.pdfIn PDF document text
    • https://moxuwurenawa.weebly.com/uploads/1/3/0/8/130874588/regosasemeb.pdfIn PDF document text
    • https://mubelumovetofap.weebly.com/uploads/1/3/1/8/131856402/dixilod-xolokewugi-dabefase.pdfIn PDF document text
    • https://fowaluta.weebly.com/uploads/1/3/4/4/134488886/garemijujaviju_sikekigotakerer_faposagitek.pdfIn PDF document text
    • https://cdn.sqhk.co/linerutinew/bgdjhTd/60028537777.pdfIn PDF document text
    • https://cdn.sqhk.co/masunidupag/ephgBo6/dosilelojanojabo.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/fa419483-b509-4059-93a5-16c95fdaec4f/71368153898.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b77de0ca-1501-4892-a73c-03520e4ebb64/49375435302.pdfIn PDF document text
    • https://s3.amazonaws.com/busutafitufe/categorical_vs_quantitative_quiz.pdfIn PDF document text
    • https://s3.amazonaws.com/tidigudetefumof/zolup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dbeb78c9-13c5-423b-a119-35c7aff320ec/banana_kong_blast_app_store.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE61 5536 bytes
SHA-256: e7bd1c4efdae2f037d3862422d77102c19f49dd1e21b5692230efc97dc7beb30
font_01_sfnt_off00010162.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10162 10736 bytes
SHA-256: 47dfcd9b4433264b66fbedc64961cbecfe2d6258e6c5742d4c196ce2e8f72b0b

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