Malicious PDF — malware analysis report

Static analysis result for SHA-256 dbb60a4ad89358d3…

MALICIOUS

PDF

83.3 KB Created: 2021-03-25 04:06:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: d0d8f19e531b3047a9503477a7046cc1 SHA-1: 3d8dd46953a12413699bd9faba6c45d470542604 SHA-256: dbb60a4ad89358d3185684b25716865e805458a34d0567bc4325ac0298c1199b
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many of which are hosted on disposable domains or link farms, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic indicate the document is designed to redirect users to malicious sites, likely for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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
  • 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.
  • 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://jumiwimov.ru/123?utm_term=whatsapp++for+redmi+2 PDF link annotation
    • https://bidopafogusiw.weebly.com/uploads/1/3/1/0/131070115/83302.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370302/normal_5ff42d08a1630.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494657/normal_6024995221cb1.pdfIn PDF document text
    • http://lbaranaydin.com/15174060859e6qjs.pdfIn PDF document text
    • https://gegefajowib.weebly.com/uploads/1/3/1/3/131380265/vesujupizafuwova.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477637/normal_5fe3ebce5df7f.pdfIn PDF document text
    • https://risimukino.weebly.com/uploads/1/3/1/3/131383953/gukerodeliwexeb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368251/normal_600bbef45ff73.pdfIn PDF document text
    • https://lopiranurepo.weebly.com/uploads/1/3/4/7/134735856/jezivuvaj.pdfIn PDF document text
    • http://xrootunited.com/qual_o_melhor_livro_espiritismo_para_inicianteskd8nt.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/zoluwivebiro/81713225153.pdfIn PDF document text
    • https://s3.amazonaws.com/luropi/chemistry_experiments_for_class_12.pdfIn PDF document text
    • https://s3.amazonaws.com/pibabopuduj/zmodo_ip_camera_reset.pdfIn PDF document text
    • https://b84c3727-5d5a-4c5d-9d5d-21cac87b3a69.filesusr.com/ugd/fdd6c2_6ab2f745f81a44d2b707ba0b727ec403.pdf?index=trueIn PDF document text
    • https://064d663d-f6b2-44cf-a6ad-083da5f315e5.filesusr.com/ugd/77eba6_4e90757e4c79475b83798e2227d925e2.pdf?index=trueIn PDF document text
    • https://dae57379-2785-4108-a223-4562ecbfc22e.filesusr.com/ugd/87ad98_415b860932264d4f8cf011f8e6ec34b4.pdf?index=trueIn PDF document text
    • https://6cb1c90e-07cf-4522-b85d-4edd8abc33c8.filesusr.com/ugd/0c41e7_478b140d196a4cd3b149b9d981d192e1.pdf?index=trueIn PDF document text
    • https://d934ed86-632c-4751-b35b-4303166f997e.filesusr.com/ugd/be0f55_f006016ed17f4f1faaa880a769113493.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/faluzotixupi/clash_royale_hack_apk_link.pdfIn PDF document text
    • https://s3.amazonaws.com/feborobegibew/nusudisozukuregazepopan.pdfIn PDF document text
    • https://s3.amazonaws.com/gidibesuxi/zemasipukeruzemusorakad.pdfIn PDF document text
    • https://s3.amazonaws.com/zisulamisozoto/ada_compliance_guidelines_for_parking_lots.pdfIn PDF document text
    • https://s3.amazonaws.com/nutanigonu/fibegorurivi.pdfIn PDF document text
    • https://s3.amazonaws.com/kaxukok/dujoke.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_off000107df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107DF 5392 bytes
SHA-256: 7922777c1048c5762b2f11d9f6c0c43b3be4444f3b7c6d96e4d4578e55d5777a
font_01_sfnt_off00011a1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A1D 11220 bytes
SHA-256: ad4b8a70426ab925857f7ddf794f16f025ec26779a4ec3cde390bdc4946f4887

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