Malicious PDF — malware analysis report

Static analysis result for SHA-256 081f0cfe93a9e754…

MALICIOUS

PDF

84.7 KB Created: 2021-05-06 02:19:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: e683294b492f52aeec6993f459ac3285 SHA-1: d007909fd53b6ad88f60c73580ebb15bc497b619 SHA-256: 081f0cfe93a9e75414c9c73172e19a0c5d22e2c64b1888753287ca4848fc5111
156 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, indicating a high likelihood of malicious intent. It contains a large number of external links, suggesting a link farm or redirection mechanism to distribute malicious content. The presence of external URIs and a PDF link farm heuristic points towards an attempt to direct users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://dugedepap.ru/strik?utm_term=netgear+ac1600+specs PDF link annotation
    • https://cdn.sqhk.co/jogekiluse/djivjdS/26429001582.pdfIn PDF document text
    • https://cdn.sqhk.co/dasofuduveje/x5hg5ge/maxazadukuxezuvex.pdfIn PDF document text
    • https://nelubetif.weebly.com/uploads/1/3/5/3/135322580/rojudatexopa.pdfIn PDF document text
    • https://zutuvibob.weebly.com/uploads/1/3/1/4/131407898/99e9d0f50cafef.pdfIn PDF document text
    • https://cdn.sqhk.co/putuziboki/jf3Ngcr/h_band_app_help.pdfIn PDF document text
    • http://mawidoxejonej.iblogger.org/19981053638.pdfIn PDF document text
    • https://cdn.sqhk.co/votezevon/hiYmibY/44605784165.pdfIn PDF document text
    • https://nawexolaka.weebly.com/uploads/1/3/4/7/134704757/50a73.pdfIn PDF document text
    • http://kisizifavo.getenjoyment.net/32861326036.pdfIn PDF document text
    • https://zimegusak.weebly.com/uploads/1/3/4/6/134605775/f3710f18e.pdfIn PDF document text
    • http://nufudoze.getenjoyment.net/battlefield_earth_book.pdfIn PDF document text
    • http://kimokabif.medianewsonline.com/liligedemewiwusagenup.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sadoboxijowem.myartsonline.com/demeter_and_persephone.pdfIn PDF document text
    • http://vexabimumemig.atwebpages.com/51857209152.pdfIn PDF document text
    • http://sapuxomaz.epizy.com/93165979522.pdfIn PDF document text
    • https://s3.amazonaws.com/jukezeluf/multiple_employee_weekly_schedule_template.pdfIn PDF document text
    • https://s3.amazonaws.com/kegubinefuda/zowituw.pdfIn PDF document text
    • https://s3.amazonaws.com/gezizefefififa/phonics_workbook_grade_1.pdfIn PDF document text
    • https://s3.amazonaws.com/vovabagubajegeb/factory_reset_cisco_air-lap1142n-e-k9.pdfIn PDF document text
    • https://s3.amazonaws.com/bodajaku/the_book_of_colors_dr_seuss.pdfIn PDF document text
    • https://s3.amazonaws.com/gotijejaj/tusaguf.pdfIn PDF document text
    • http://fixiwerasame.rf.gd/hindu_wedding_invitation_templates_online.pdfIn PDF document text
    • https://s3.amazonaws.com/kexamoxusinixu/bildungsroman_novel.pdfIn PDF document text
    • https://s3.amazonaws.com/dejazuvorira/kadogixanoxanib.pdfIn PDF document text
    • https://s3.amazonaws.com/petubapizo/utility_bill_templates.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_off00010d4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D4C 5384 bytes
SHA-256: 39b1768608c6ff3470092f3d21b37295089a6e09c11e933065942d3469ec7ad2
font_01_sfnt_off00011fbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FBB 10992 bytes
SHA-256: 9905a0ef043f382aba0182c61b883086ad9a3641d10c92c1ea2d4eb5ef1a9747

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