Malicious PDF — malware analysis report

Static analysis result for SHA-256 08b89d438a4fa0d3…

MALICIOUS

PDF

74.1 KB Created: 2021-03-19 09:07:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 88d094c566a3ebc232cc0f16d622bd3e SHA-1: 203a79aa1e6356d16759e4dc5fa74fb05b6c4945 SHA-256: 08b89d438a4fa0d3153f327376b91361fc806e7e37f17e54a959ba55c26b28a0
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, suggesting a link farm or phishing attempt. The primary external URI points to 'https://xezojetit.ru/aws', which is likely the destination for a phishing lure or malware download. No scripts were extracted, but the PDF structure and numerous external links strongly suggest a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://xezojetit.ru/aws?utm_term=programa+de+la+chola+chabuca+en+vivo
    • https://cdn-cms.f-static.net/uploads/4494674/normal_602003f7bf847.pdf
    • https://cdn-cms.f-static.net/uploads/4388183/normal_5fdc635602f59.pdf
    • https://fepirajoruvizu.weebly.com/uploads/1/3/4/3/134311883/gijamatuburig-pojavofaj.pdf
    • https://gidupewurugi.weebly.com/uploads/1/3/1/6/131637306/3394c5916b1a05.pdf
    • https://cdn-cms.f-static.net/uploads/4489716/normal_604fff039b335.pdf
    • https://static.s123-cdn-static.com/uploads/4422918/normal_6005d03816fe9.pdf
    • http://rasudilikid.mywebcommunity.org/zofifisewuxejigugusojupa.pdf
    • http://vakiduweg.mygamesonline.org/pablo_neruda_poemas_cortos_de_amistad.pdf
    • http://gunofixe.medianewsonline.com/capitalization_worksheets_middle_school.pdf
    • https://static.s123-cdn-static.com/uploads/4461211/normal_5fdce02e0176b.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/e02ff11d-1bd0-464f-b784-1cbca2b9a708/pisakugixepedazukamijased.pdf
    • https://s3.amazonaws.com/pojikovewijeja/nipev.pdf
    • https://s3.amazonaws.com/paxuvagal/muxizorefup.pdf
    • https://s3.amazonaws.com/widuxade/rafukoxepobopufujosupi.pdf
    • https://s3.amazonaws.com/satuja/divine_power_3.5_dd_tools.pdf
    • https://uploads.strikinglycdn.com/files/b9e521d8-628c-49d6-bc82-646cff72ce31/17091420517.pdf
    • https://uploads.strikinglycdn.com/files/f01fc2bb-f534-4b3a-8201-5dadc46c0203/how_to_end_a_simple_stitch.pdf
    • https://s3.amazonaws.com/napejaxosinages/commercial_invoice_template_canada_fedex.pdf
    • https://uploads.strikinglycdn.com/files/8dc790fd-5855-4898-a81d-0ffc735643af/clark_forklift_dealer_wichita_ks.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e043.bin
cb5350cdd703fd7e5e5cafbacc523b0f273dd6eca6e94b5c8c96c5d9a6dcf48e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE043 5376 bytes
font_01_sfnt_off0000f263.bin
afdd87b797bfd5395fdb81278ba934919a35abf7ad873c324dfbaf6fb46c2685		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF263 12128 bytes

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