Malicious PDF — malware analysis report

Static analysis result for SHA-256 020b8ea22e329df2…

MALICIOUS

PDF

85.4 KB Created: 2020-11-17 19:22:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: bc3a5ca5516be2feb97313ac988712d7 SHA-1: 4c7dc139968d290f882ab6557100975e4fea0be6 SHA-256: 020b8ea22e329df231087d9b855aacf64473f6ba268835c6d535edac211e6b0b
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains multiple embedded links, with at least one pointing to known malicious redirector infrastructure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/strik?utm_term=lspdfr+first+response In PDF document text
    • https://norigawe.weebly.com/uploads/1/3/3/9/133988483/tirenexiri.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460076/normal_5fad854c5bb92.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425738/normal_5fa150562cf66.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/61bd08dc-5635-4a5a-bfb9-a816b39e0f8f/94091543297.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1083b5b6-4d43-41f1-8205-50ac5c9c7c77/55235339451.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd88c1d8-b97d-4676-9218-2ca6591a1c26/jcpenney_sewing_machine_model_6945_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/15f9072f-ce28-4951-9b1f-01885797e1e7/xudigelevigeduk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ead6d60a-b6bb-4b7f-8f5d-7aa36026a7c8/cabinet_battle_2_lyrics.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/06d7abd6-d4d3-4b54-909f-461bd51aec96/femuzumurarid.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5b5d0464-dd06-4804-b934-74456db729b9/rinusedo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0960ad0a-b00c-4843-85a7-4688e36e7294/regra_de_sinais_adio_subtrao_mul.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/33229cca-30eb-491d-9ce8-b35165a5d494/fofibubowurakevazeger.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/99437206-e6c1-47b8-b497-1c758e1a4667/noticias_en_voz_pasiva.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f954816d-2bbb-4525-8208-25b9cd7e13e9/ralavomobisoweberuxofado.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00011a04.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x11A04 25748 bytes
SHA-256: ad6f9c12fd5ade2bf120a8a4be09025e160dd077c0e5e700da90e9de5c105285
font_00_sfnt_off0000e3d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3D9 4732 bytes
SHA-256: f91c64eb02b41e9372696ffd960f6c1c69c19dd36c3728476e2d696ddcbbe5e2
font_01_sfnt_off0000f407.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF407 11168 bytes
SHA-256: 77d04a3af0d8f120b93605437cff301a7ba06481cc58d3ed22013ddce6cbccb8

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