Malicious PDF — malware analysis report

Static analysis result for SHA-256 0cab62c64c836bcd…

MALICIOUS

PDF

77.0 KB Created: 2021-07-04 19:06:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: c70c5c93950a2dec04f67ff26a95ed62 SHA-1: 3efe81fbfbf6ffcab351633a5b6f5f60ca5eeefb SHA-256: 0cab62c64c836bcd5c7aa4eb6c75e88ecb0db08a57de03a0f8f790b41bc1dfd0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links pointing to compromised websites, indicating a phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly suggest malicious intent. The document's structure as a link farm is designed to lure users to external, potentially harmful, resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9840

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://givemeit.ru/wp-content/plugins/super-forms/uploads/php/files/ff5c13437b93bc58a1e566e0d9133ef0/kowemolibekujen.pdf In PDF document text
    • https://marciasmithconsulting.com/wp-content/plugins/super-forms/uploads/php/files/ebb4c2129b3c9a77f28a9a05e5634460/18106090606.pdfIn PDF document text
    • https://widepolymers.com/userfiles/file/6594754723.pdfIn PDF document text
    • http://bjoybrands.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c2f1a494cd---wuverav.pdfIn PDF document text
    • http://asalsold.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca3dedb0af---70649543939.pdfIn PDF document text
    • https://bliznacite.com/files/60917970301.pdfIn PDF document text
    • http://31kouqiang.com/userfiles/file/1623499162.pdfIn PDF document text
    • https://www.ayersworthglen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160883c3094dcc---25548662758.pdfIn PDF document text
    • https://rmdschoolandcollege.com/wp-content/plugins/super-forms/uploads/php/files/n5uiclokpls49sfp9a13onhed6/basedepewinupumu.pdfIn PDF document text
    • https://www.frontierexim.com/wp-content/plugins/super-forms/uploads/php/files/indtkgmfdij2h1i0asac95m72e/tufotubumewonetajonewu.pdfIn PDF document text
    • http://staractivecollection.com/resimler/site/files/85648451563.pdfIn PDF document text
    • http://garmagostaran.com/Upload/file/23972470550.pdfIn PDF document text
    • https://almuhja.net/ckfinder/userfiles/files/vemadopujul.pdfIn PDF document text
    • https://almondzwealth.com/administrator/imagetemp/file/26413281390.pdfIn PDF document text
    • http://totalfinance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a28426439db---97306348027.pdfIn PDF document text
    • https://www.kbstephens.com/wp-content/plugins/super-forms/uploads/php/files/7c2f132892c9f74660145c1f1bf3e275/gejefilumavowatogadobix.pdfIn PDF document text
    • http://stkvn.ru/wp-content/plugins/super-forms/uploads/php/files/925eccd54389757d961200b2819e92f4/wiwijusi.pdfIn PDF document text
    • https://skazkavdom.com/wp-content/plugins/super-forms/uploads/php/files/1c92889bbe6e16979f24ebe23c02a42a/vaxisifemomirofavu.pdfIn PDF document text
    • https://www.lesson-online.org/wp-content/plugins/super-forms/uploads/php/files/co9hsn2ivo66gg79n2slgeemk3/saxepidoka.pdfIn PDF document text
    • http://12shio5.com/contents//files/tetevarijepinirapetuvoj.pdfIn PDF document text
    • https://www.spoton.pet/wp-content/plugins/super-forms/uploads/php/files/q6hl8lrqh3o7gi9uq08gff78nq/nofowatebudi.pdfIn PDF document text
    • https://atkarisuli.hu/userfiles/file/keterimuwudavafifubixubow.pdfIn PDF document text
    • https://dutchfansitenetwork.nl/ckfinder/userfiles/files/80023898172.pdfIn PDF document text
    • http://zkojicin.cz/userfiles/file/virapopugusakoxo.pdfIn PDF document text
    • http://vandientuchinhhang.com/upload/files/41263557253.pdfIn PDF document text
    • https://muratay.nl/userfiles/file/81255623111.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=c+projects+pdfPDF link annotation
    • 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cc27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC27 16496 bytes
SHA-256: a3900d1db9b8c73564c9af11d946f7e33ed43cdc716602c521514ef5f5b8be5d
font_01_sfnt_off0000f71d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF71D 10368 bytes
SHA-256: f6b074f5bbedd00abbe6373d9d3b461e78a8a187b8d23ecbf46cc157b94b4341
font_02_sfnt_off00010eb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EB4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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