Malicious PDF — malware analysis report

Static analysis result for SHA-256 96c9756e15fba8b5…

MALICIOUS

PDF

74.2 KB Created: 2021-09-08 10:50:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 772da46ac56e80a200ebe71a092339b6 SHA-1: c3b4ce46e1aa48256a317e129563705f0743adb2 SHA-256: 96c9756e15fba8b5d9dd6f7d14a6d00bf2e66aba113f6651c89761cdecbe420d
156 Risk Score

Malware Insights

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

The PDF contains a large number of links, many pointing to WordPress installations that appear to be compromised. These links likely serve as a link farm to distribute phishing content or malware. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

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://thepetrichortouch.com/wp-content/plugins/super-forms/uploads/php/files/bn69f5s788lnruv9ccd6ak6h5s/fagubagafonavojaru.pdf In PDF document text
    • https://www.andimoda.com/wp-content/plugins/super-forms/uploads/php/files/9f1147255c97eedd79a2a696bee92ef5/43138620318.pdfIn PDF document text
    • http://alpanelektrik.com/depo/sayfaresim/file/44250786681.pdfIn PDF document text
    • https://www.synergyheart2heart.team/wp-content/plugins/super-forms/uploads/php/files/ac86rn2n0efpcibqdpjb8qijq6/vudezuroxubot.pdfIn PDF document text
    • http://www.photobreak.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607498b120f39---zizineviwojav.pdfIn PDF document text
    • http://wypelnienia.kratex.pl/wp-content/plugins/super-forms/uploads/php/files/726ad50f8dd1f1f150556b2f4eca58d8/legisoja.pdfIn PDF document text
    • https://moniimpex.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d91c8a2d98d---83932915055.pdfIn PDF document text
    • http://krevue.cz/UserFiles/File/gajowajenip.pdfIn PDF document text
    • http://eugensa.lt/app/webroot/uploads/userfiles/files/totar.pdfIn PDF document text
    • http://ng-sons.com/userfiles/file/14741536289.pdfIn PDF document text
    • http://maksimetall.ru/files/zomakesetu.pdfIn PDF document text
    • http://zaun-produzent.de/userfiles/file/xabotibexeluwe.pdfIn PDF document text
    • http://mosme.org/uploadfile/files/vedilekanini.pdfIn PDF document text
    • https://independentmusicleague.com/wp-content/plugins/super-forms/uploads/php/files/ae3dd7fc98435144db19958f1204beb3/9623409762.pdfIn PDF document text
    • https://pluviaterra.mx/wp-content/plugins/super-forms/uploads/php/files/1282a99123d8d3f7a8ae9191aa5a2ea0/12959053472.pdfIn PDF document text
    • http://linhkienhunganh.vn/luutru/files/61642040172.pdfIn PDF document text
    • https://doluhosting.com/calisma2/files/uploads/retitepakole.pdfIn PDF document text
    • http://lawcab.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16129f04e9e5f4---tufalimizotijekibedagutu.pdfIn PDF document text
    • https://canadiancontractorservices.com/wp-content/plugins/super-forms/uploads/php/files/d32a3rkih91e9f2mdss6u5v522/10731357369.pdfIn PDF document text
    • https://frasertechno.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad966adba92---kidufajefakinegasul.pdfIn PDF document text
    • https://milliondollardesiclub.com/upload_files/featured/files/giwijepegezofitoruvibure.pdfIn PDF document text
    • http://traviet36.com/upload/files/17453319034.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=dobladora+de+varilla+manual+truperPDF 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_off0000bd06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD06 10692 bytes
SHA-256: bd0a7ef6eca9cba8388802bb9bf305eaee834ca1b9c341e2300dd023243556c7
font_01_sfnt_off0000d540.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD540 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000ed52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED52 17536 bytes
SHA-256: 3e312db57829d23fe883ff25462624ce39cefb3da383e40ff9b62c03c3aea8fb

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