Malicious PDF — malware analysis report

Static analysis result for SHA-256 de036113d3890cdd…

MALICIOUS

PDF

99.7 KB Created: 2021-08-15 14:42:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 4dd90618db78dd659dc2a3ad10a18548 SHA-1: b199f829b3aa8804854ff09a8940c3fc16a9cd86 SHA-256: de036113d3890cdd3fb98f1bbe551dfcd06d3e57da95204e8f096b0e75b8aeac
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs that form a link farm, likely intended to redirect users to phishing sites or download further malware. The presence of these links and the overall structure suggest an attempt to lure users into clicking malicious content, consistent with a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://allytemp.ru/uplcv?utm_term=always+on+display+apk+samsung+j5+prime+specs PDF link annotation
    • http://crystalsteakandstogie.com/clients/1/1d/1dbb6d5698303b6304ae84622e226a19/File/30134438265.pdfIn PDF document text
    • https://www.eos.org.eg/ckfinder/userfiles/files/45480764153.pdfIn PDF document text
    • https://anmimar.com/royal/userfiles/file/tovun.pdfIn PDF document text
    • https://lemanssrl.it/file/50365877192.pdfIn PDF document text
    • https://bonpetsupply.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f507053eb6---bejofizodavubuwes.pdfIn PDF document text
    • https://pensionatiitalianiinportogallo.it/wp-content/plugins/super-forms/uploads/php/files/7b3043760611a9c72a9af73024bf64b2/zilusobam.pdfIn PDF document text
    • http://thelonerangerfanclub.com/ckfinder/userfiles/files/gilupitexidadezusiwarav.pdfIn PDF document text
    • https://www.popcaffe.it/wp-content/plugins/super-forms/uploads/php/files/87eba1524982804aa70e1c09bd033aaa/zinopudizaxupodudaweruz.pdfIn PDF document text
    • https://utilitydiscount.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086367d5dfc7---sinevovevasov.pdfIn PDF document text
    • https://subarini.ro/mm/file/xozelujo.pdfIn PDF document text
    • http://rencontres-icare.org/userfiles/file/7530232484.pdfIn PDF document text
    • https://www.onestopnaturalstore.ca/wp-content/plugins/super-forms/uploads/php/files/vibjsev7e2k0lqth020lt79qgm/xomojufevenimagekivatoto.pdfIn PDF document text
    • http://www.carolglassman.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f4536bba85---5388383142.pdfIn PDF document text
    • http://giacongcomposite.com/upload/ck/files/79778375449.pdfIn PDF document text
    • https://heritagecambodiatravel.com/userfiles/file/tagowux.pdfIn PDF document text
    • https://www.urban-quartz.co.uk/wp-content/plugins/super-forms/uploads/php/files/071924aeb17a601142da1e4ee2b9752f/30413496733.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609afb8708793---fogesawojikaxi.pdfIn PDF document text
    • http://bukharasuwanee.com/sites/default/files/file/vikowedadoxijutefupetotul.pdfIn PDF document text
    • http://hoangminhceramics.com/app/webroot/uploads/files/71039217491.pdfIn PDF document text
    • http://x04ydivan.ru/userfiles/file/39288677014.pdfIn PDF document text
    • https://ltanimalpark.com/wp-content/plugins/super-forms/uploads/php/files/8d3089dc688c8297d24631ab9e42d5ad/32967400472.pdfIn PDF document text
    • https://netwindowvn.com/uploads/userfiles/file/39573710235.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010c24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C24 11396 bytes
SHA-256: 7cc0a9cf327212694d1159f9fb3880fc8797775ad8e38debd130b7176f220716
font_01_sfnt_off000126d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126D8 4136 bytes
SHA-256: 19a01464bceb2915355d5ca15813689b6fb367c5718ab7a86352fafcee4500f2
font_02_sfnt_off00013697.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13697 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00014ea9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14EA9 18516 bytes
SHA-256: 4b069e50ce28408be4f7323336f334788aca65fa77c247e38b05e93dcd7ee234

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