Malicious PDF — malware analysis report

Static analysis result for SHA-256 738340aaf9227e8a…

MALICIOUS

PDF

73.7 KB Created: 2021-02-20 03:25:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 293f2fcd7e35a1b8e3a872da896dfbaf SHA-1: 96024427b658586de8412fc1ae08635bb53e1277 SHA-256: 738340aaf9227e8aaf1fed43bf090e7bddf5efd7eb80f16d52312dca38daea08
156 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. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://seumenha.ru/strik?utm_term=month+to+month+rental+agreement+form PDF link annotation
    • https://genezekanoz.weebly.com/uploads/1/3/1/4/131413678/7644145.pdfIn PDF document text
    • http://greatmasters.biz/4924857784113izm.pdfIn PDF document text
    • http://ooovseanalizi.ru/waxerewafakatubah4w1t.pdfIn PDF document text
    • https://kofivenemiwelew.weebly.com/uploads/1/3/1/3/131380814/wibuna.pdfIn PDF document text
    • http://best-ital.fun/22817006815re4y5.pdfIn PDF document text
    • http://autolombardpro.ru/mupaniwumaxidkvmkl.pdfIn PDF document text
    • https://gikovasedubum.weebly.com/uploads/1/3/4/5/134507074/3890331.pdfIn PDF document text
    • http://getyourscore.info/kuzawotfn6.pdfIn PDF document text
    • http://priz24.site/44218470434f4ppg.pdfIn PDF document text
    • http://ryukzak.digital/adobe_cs6_serial_numberpaw3l.pdfIn PDF document text
    • http://vashe-zdorovie.xyz/toxiboniiadt.pdfIn PDF document text
    • http://ersoil.fun/totonulinmh4ha.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/begijufadi/55191314015.pdfIn PDF document text
    • https://s3.amazonaws.com/wujapu/72942304006.pdfIn PDF document text
    • https://s3.amazonaws.com/vexeliku/76744667322.pdfIn PDF document text
    • https://s3.amazonaws.com/xalexojaxipud/git_all_commands_cheat_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/metubevozisul/9852500616.pdfIn PDF document text
    • https://s3.amazonaws.com/pusori/tozogajivin.pdfIn PDF document text
    • https://s3.amazonaws.com/podawakumepewez/amniocentesis_test_report_sample.pdfIn PDF document text
    • https://s3.amazonaws.com/fifuto/basha_tamil_movie_songs_free_tamilwire.pdfIn PDF document text
    • https://s3.amazonaws.com/bevekizadoxuj/22323481881.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d93e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD93E 4748 bytes
SHA-256: a1e1c4385ab3cb3802db5d22123be974100bacd6ab3daa579301101c4e6e496f
font_01_sfnt_off0000e92b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE92B 9948 bytes
SHA-256: 45893ccfb2ffba052425a14e1f9d27634586595d6385b9a40cac590a189e7d4b
font_02_sfnt_off00010b49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B49 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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