Malicious PDF — malware analysis report

Static analysis result for SHA-256 58d6ed26f37f788a…

MALICIOUS

PDF

88.8 KB Created: 2021-07-06 22:02:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 7d204dcb97e6f05aa177c7211ad99554 SHA-1: 772ef2ded6c29af122c112e243393d74a78f5ffc SHA-256: 58d6ed26f37f788a588e99662439853ba8bb844e485c0b718e957d371d3c772b
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress upload directories, suggesting a phishing or redirection scheme. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to lure users to malicious sites or download further payloads. No scripts were extracted, limiting the analysis of direct execution vectors.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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 http://asfalon.com/__files/file/kalamatakupolalu.pdf In PDF document text
    • http://ronniejoymemorialfund.com/clients/1/1a/1a75100f29d804137a154ca93ef51a80/File/tunobuzobugutofosovozo.pdfIn PDF document text
    • https://www.kadinlarsitesi.org/wp-content/plugins/formcraft/file-upload/server/content/files/16086a9d05aa75---laxadoposo.pdfIn PDF document text
    • http://jingluo.net/uploadfiles/files/81119002588.pdfIn PDF document text
    • https://bodwellassociates.com/wp-content/plugins/super-forms/uploads/php/files/331bb2f9f096fac78f349a34f28ef2db/59957736220.pdfIn PDF document text
    • http://worldnaturalfood.com/image/upload/File/85402100819.pdfIn PDF document text
    • http://idealhca.com/admin/images/file/faxupizefekata.pdfIn PDF document text
    • http://www.socalgreatwhite.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2fd1aa4989---19134738031.pdfIn PDF document text
    • https://www.sanier.pl/wp-content/plugins/super-forms/uploads/php/files/vsssesdm08esn0f8m17vsrgt8l/8652257659.pdfIn PDF document text
    • https://www.landalastadservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076a6ca20832---15830755672.pdfIn PDF document text
    • https://baodinhsolar.com/wp-content/plugins/super-forms/uploads/php/files/lietrcuc2pui8714n32ns09kl2/71151836517.pdfIn PDF document text
    • http://rollfactorytogo.com/uploads/files/46854427286.pdfIn PDF document text
    • https://latework.cz/soubory/11026960041.pdfIn PDF document text
    • http://www.segurosfacility.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160ab944a91ec0---517539076.pdfIn PDF document text
    • https://hcs1000.org/wp-content/plugins/super-forms/uploads/php/files/d457f0cab022c2573c96ef1bf85ea6dc/gavakif.pdfIn PDF document text
    • https://www.cocochan.com.pk/wp-content/plugins/super-forms/uploads/php/files/380690ecbf6a4d00f7f92196d6cfbccf/bubenukefumelovokewos.pdfIn PDF document text
    • http://scantech3d.com/files/59514249242.pdfIn PDF document text
    • https://www.dyna-tech.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609e552e4c359---21898155245.pdfIn PDF document text
    • https://bandotrading.com/uploads/file/15380858271.pdfIn PDF document text
    • http://orderleesushi.com/uploads/files/39380315300.pdfIn PDF document text
    • http://verypool.cn/images/upload/File/ribaloradoxutoxulumixe.pdfIn PDF document text
    • https://maxim-catering.de/wp-content/plugins/super-forms/uploads/php/files/a2aptbeoep98kp75bg2tqm2u6e/raviwerebefelafabesapus.pdfIn PDF document text
    • https://rm-parketi.si/uploads/dokiwimezilumuti.pdfIn PDF document text
    • http://dichvutheapec.com/upload/FCK/file/71437395568.pdfIn PDF document text
    • http://www.majoriscambio.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160d23fe19f67e---xawetari.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=is+it+legal+to+own+a+wolfPDF 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_off0000f97c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF97C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011193.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11193 10328 bytes
SHA-256: 7d0b3e83ba711cd9f7cc183337614e63dcdb05314663eb664b5222355498754a
font_02_sfnt_off0001290c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1290C 17288 bytes
SHA-256: 2b58cba86138e00267ea20415735d2406c0942d21694c781b0088f91eedea449