Malicious PDF — malware analysis report

Static analysis result for SHA-256 80d97b1f2215371b…

MALICIOUS

PDF

76.1 KB Created: 2021-07-14 00:23:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: d76fca1b4a18c9a69297271e62ea7608 SHA-1: ff18e134327b69a003fb34f3f28cba89c0e2b23a SHA-256: 80d97b1f2215371b5aff87e93e84e963a83049247d2d7c2d0f77da6d292d0845
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was detected as malicious by ML classifiers and ClamAV, specifically identified as a phishing trojan. It functions as a link farm, containing numerous URLs that point to various websites, many of which appear to be compromised WordPress installations or disposable hosting. The primary purpose seems to be directing users to malicious sites, likely for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9840

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://nomylo.ru/uplcv?utm_term=c%23+word+to+pdf+without+office PDF link annotation
    • https://xn--80aaa1anac6cg.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/cefc3987f423ca14101aa85f5df4d3ef/69637952430.pdfIn PDF document text
    • http://resetimpianti.it/reset/public/file/jifelefakelelixuzupusojej.pdfIn PDF document text
    • http://www.molinoag.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b485db7698c---jemubixorujoka.pdfIn PDF document text
    • http://yatros.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1608c9a7557ea0---68419281804.pdfIn PDF document text
    • https://thewentworthco.com/wp-content/plugins/super-forms/uploads/php/files/0naho6o7qkmll4k7k55247lfpm/5784027955.pdfIn PDF document text
    • https://eyescare.vn/app/webroot/upload/ckfinder/files/mugagubajaguge.pdfIn PDF document text
    • http://sieuthivatlieuhoanthien.com/upload/files/busedixavokuvununelo.pdfIn PDF document text
    • https://antoinepanau.com/wp-content/plugins/super-forms/uploads/php/files/fe602b01a657354526e1bceb66073ec0/jifemewenudojemikofop.pdfIn PDF document text
    • http://lirealestatelitigator.com/wp-content/plugins/super-forms/uploads/php/files/9d6142d68b35f110c3489c4e3d9d97c1/birixemenebise.pdfIn PDF document text
    • http://tara77.com/clients/46590/File/leninor.pdfIn PDF document text
    • http://short-story.ru/upload/file/52601121013.pdfIn PDF document text
    • https://www.golddustdental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160900974af7a5---28122702256.pdfIn PDF document text
    • http://hrzservices.com/uploadfiles/file/kabagujitabolat.pdfIn PDF document text
    • http://nc2e.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607743c511abe---69534926859.pdfIn PDF document text
    • http://unsersohn.ch/images/file/puloxafefinarabuxetagor.pdfIn PDF document text
    • https://iiml-pgpsm.in/ckfinder/uploads/userfiles/files/18214803550.pdfIn PDF document text
    • http://www.bordadoindustrial.com/ckfinder/userfiles/files/pusolaxigatogizijis.pdfIn PDF document text
    • https://www.llgnjinc.com/wp-content/plugins/super-forms/uploads/php/files/feedcf17e7797413303cf60d39dc68d3/joxabebawekinipetik.pdfIn PDF document text
    • http://interstroy96.ru/uploads/files/durolobiratev.pdfIn PDF document text
    • http://lapawan15.com/shop/fck_file/file/gawimobisiso.pdfIn PDF document text
    • http://in-dapt.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c19c9b1c084---63593670060.pdfIn PDF document text
    • https://endoaccessories.com/wp-content/plugins/super-forms/uploads/php/files/l78di9unkpducckta1849p7qq5/71079364046.pdfIn PDF document text
    • http://ypperfect.com/ckfinder/userfiles/files/biwenojilukomubafedu.pdfIn PDF document text
    • https://mudateconmigo.cl/wp-content/plugins/super-forms/uploads/php/files/fae80e5c2d9a46c793ed7373c245218f/karetovupefugipedezulati.pdfIn PDF document text
    • http://metallpress.info/files/39874134512.pdfIn PDF document text
    • http://plenaadoracao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16085654048683---77798347414.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cba9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBA9 9104 bytes
SHA-256: fe4a9ad32d6d12da45ce8861a1e6e511df5579fd33367a5c4d1c9e774d301804
font_01_sfnt_off0000de76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE76 17072 bytes
SHA-256: 9d11f55aeec5b3be7dc7221991d7ec7497a916a7ac3601246e087f5876daa08e
font_02_sfnt_off00010b56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B56 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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