Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc03a25115641e88…

MALICIOUS

PDF

80.5 KB Created: 2021-03-18 07:54:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 1544143af097807e442deb2eb25e04ef SHA-1: 2464fcd148c05f126231e74db7b89b29fc0cf37a SHA-256: fc03a25115641e88b6d27ad002ec6018f4d1078de9a5b614f16632d5c831cce1
194 Risk Score

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. The file embeds a large number of external links characteristic of an SEO link farm and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://dugedepap.ru/wix?keyword=kenmore+elite+ultra+wash+quiet+guard+7+manual PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4452376/normal_601410b38244b.pdfIn PDF document text
    • https://buralekareze.weebly.com/uploads/1/3/4/3/134326789/5503337.pdfIn PDF document text
    • https://mewifebobonopad.weebly.com/uploads/1/3/4/6/134625165/kinuwugej.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373985/normal_60039a5f188b9.pdfIn PDF document text
    • https://sumiloruxefeme.weebly.com/uploads/1/3/2/8/132814276/pabisodo-buwoja-rufaso-zepizilirilejuw.pdfIn PDF document text
    • https://xanusikufugab.weebly.com/uploads/1/3/4/3/134371049/xolitajapaw.pdfIn PDF document text
    • https://guxenebulofoto.weebly.com/uploads/1/3/2/8/132814975/parazonizen.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463529/normal_603305c1ca718.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375203/normal_601347a22062f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446636/normal_602c50a63d544.pdfIn PDF document text
    • https://gatojodegapov.weebly.com/uploads/1/3/1/6/131637656/melubuzituvan_zuxabowutive_wuxejawirulusa_dopesalenatas.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470028/normal_60409cca239b1.pdfIn PDF document text
    • https://soxiwavarado.weebly.com/uploads/1/3/1/4/131437421/5806308.pdfIn PDF document text
    • https://vigobekopu.weebly.com/uploads/1/3/2/3/132302998/1730606.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4502817/normal_5fca4b80f2a03.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/tevomenil/free_cover_letter_templates_for_law_enforcement.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0e648bd1-0ce6-41db-84df-f2fb5f691c44/kexifiwawe.pdfIn PDF document text
    • https://s3.amazonaws.com/wizitifowubux/62991091769.pdfIn PDF document text
    • https://s3.amazonaws.com/fajetufekejo/depudumogokibekaf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/21c925ea-532a-415b-abdb-1e13cf2cf191/temas_adventistas_en_power_point_para_descargar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b65083f-51af-4693-ae9a-33b8146fe710/44963396653.pdfIn PDF document text
    • https://s3.amazonaws.com/zuniverijesud/arum_lily_calla_lily_information.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_off0000fbf1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBF1 5504 bytes
SHA-256: 4b85ddb177e4fa4619c2a987b810c012e600b214f331912427f9ecb5cfc3dea3
font_01_sfnt_off00010e8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E8C 11240 bytes
SHA-256: aff6207f2ac7732906b014e74f77e9b94fc69a61536343194c45876f8795d60b