Malicious PDF — malware analysis report

Static analysis result for SHA-256 68cbf880edb5758b…

MALICIOUS

PDF

81.0 KB Created: 2021-03-21 11:14:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 16ed267c6fa54a7a250b447c10665fec SHA-1: 2f482eefbb9d81f9a1b284e5311362b59838a737 SHA-256: 68cbf880edb5758b9f36db627a226774bfa796bdfb4ee73bb92e4019a0f992a2
164 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing lure. It contains a large number of external links, many of which are likely part of a link farm designed to direct users to malicious content. The primary malicious URL identified is https://soxebez.ru/123?utm_term=adverse+selection+definition+pdf, which is likely used to deliver a secondary payload or redirect to a phishing site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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
  • 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://soxebez.ru/123?utm_term=adverse+selection+definition+pdf
    • https://girusidopot.weebly.com/uploads/1/3/0/7/130738876/918397.pdf
    • http://fozurev.22web.org/vovolixuwil.pdf
    • https://bawidonawasaz.weebly.com/uploads/1/3/4/3/134354070/7118152.pdf
    • https://wirupexulabajes.weebly.com/uploads/1/3/5/3/135322132/xupurilure_mikuzipu_tanomelukelap.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/7b84ced8-8b16-4a9b-874c-72e44442063b/58759050997.pdf
    • http://jekogowe.epizy.com/domexikutopufe.pdf
    • http://tirujukixiw.epizy.com/sample_appraisee_comments_for_performance_appraisal.pdf
    • https://uploads.strikinglycdn.com/files/4fa7a150-334a-4b80-9f16-9955016f5d31/zirubaredere.pdf
    • http://zifasodokid.epizy.com/apega_competency_based_assessment_guide.pdf
    • https://5ee0d2ad-6486-47ce-ab7d-0e7b2bae4193.filesusr.com/ugd/bc0d1e_5dc0942ee5d3483781965376c17c3f10.pdf?index=true
    • https://uploads.strikinglycdn.com/files/01ee29ae-b201-45fe-9b79-1eb11af6b5d0/lg_inverter_direct_drive_washer_filter_cleaning.pdf
    • https://973697ad-ffa4-4f9d-85cd-0c9d1ea039ee.filesusr.com/ugd/5f5755_f7d50901aceb46119b89e16c69b6f9b7.pdf?index=true
    • https://1628ddcf-e301-416d-9649-d9339b85441b.filesusr.com/ugd/0b1079_2383969875e14b528f52339d9822f9e2.pdf?index=true
    • http://rorujuzolu.epizy.com/93678420291.pdf
    • http://sokevigaku.rf.gd/hp_laserjet_m1212nf_mfp_service_manual.pdf
    • http://fizaronaxur.epizy.com/65973637512.pdf
    • https://uploads.strikinglycdn.com/files/9a794e13-2125-4ba8-b047-6ec1c7138d9f/what_was_the_radical_republicans_ideas_for_the_south.pdf
    • http://nezeseg.epizy.com/capitec_app_for_pc_free.pdf
    • http://vizulubafaxal.epizy.com/whatsapp_video_tik_tok_new.pdf
    • https://uploads.strikinglycdn.com/files/fd126070-36f8-4c40-8484-8da0801fa6b0/ap_biology_lab_report_template.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_off0001002d.bin
7c24f33920b5218e6300f75eca627c868d71296da58c6ec453d8f1e247c8ee94		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1002D 4988 bytes
font_01_sfnt_off00011145.bin
ce675e60715cd0595bf6912e9714b14bc83727f3103e3a9c0bf8d85e8b369d9f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11145 10604 bytes

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