Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f41c5858205eb88…

MALICIOUS

PDF

227.9 KB Created: 2021-07-02 11:20:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: d9165b8cf81fc9fbbecc9aee2c40987e SHA-1: 92cc8a512210dccbb2fd02dbf769302deeba98aa SHA-256: 2f41c5858205eb88c4038386c22df16de33714c6e03101cdd737cb1e449fba38
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was identified as malicious by ClamAV and an ML classifier, with heuristics indicating it contains links to compromised WordPress upload storage. The embedded URLs suggest a phishing or malware distribution attempt, likely delivered as a spearphishing attachment. No scripts were extracted, limiting the analysis of specific execution methods.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9774

Heuristics 5

  • 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.
  • 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://www.lumisolar.pe/wp-content/plugins/formcraft/file-upload/server/content/files/1609029b085e79---razozupawizusamajozixo.pdf In PDF document text
    • https://webtraffic.ch/wp-content/plugins/super-forms/uploads/php/files/2elrh74c9nor7klgpsg326gj4t/67471631163.pdfIn PDF document text
    • http://www.caslyn.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16072f7f8e214d---bokatubapin.pdfIn PDF document text
    • http://cesishotel.lv/res/wysiwyg/file/timizogowarifudogujaxuduj.pdfIn PDF document text
    • http://www.thelawchamber.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093c95c94761---4308125385.pdfIn PDF document text
    • http://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/1608cb30b48ca7---68876627478.pdfIn PDF document text
    • https://ecomassage.pt/wp-content/plugins/super-forms/uploads/php/files/g2mj71sp9unq76ieo2dmf08oak/ladelazajimetunojusomalul.pdfIn PDF document text
    • http://aksaaydinlatma.com/img/editor/image/file/sezekuvejisogu.pdfIn PDF document text
    • http://vtracauto.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f86f5c8871---wazivenisazawiga.pdfIn PDF document text
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/bc571b3e3d6ca6a3531951783df6f92c/97023889575.pdfIn PDF document text
    • https://www.couleurs-et-jardin.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16084884030ca2---37162995343.pdfIn PDF document text
    • http://badischer-kunstverein.de/ckfinder/userfiles/files/88909626050.pdfIn PDF document text
    • http://easyreturn.store/userfiles/file/vexejuresekoturodenaginug.pdfIn PDF document text
    • https://www.certificagreen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba7c1c3b2d2---menapadasototavomebur.pdfIn PDF document text
    • http://wakingbeauty.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b160f8dc4c0---kinunuvopivibofel.pdfIn PDF document text
    • https://tkpmission.org/wp-content/plugins/formcraft/file-upload/server/content/files/16089b1efb3fad---79913915109.pdfIn PDF document text
    • https://rhodium.vn/uploads/news_file/pewujipabalupugido.pdfIn PDF document text
    • https://hpx.com.ua/wp-content/plugins/super-forms/uploads/php/files/3f790b972c941f8aeefc27751fda3c8d/26982854862.pdfIn PDF document text
    • http://www.finanzanlagen-honorarberatung.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607761b8c2499---dipufutivozir.pdfIn PDF document text
    • https://ooo-kenk.ru/userfiles/file/16343297390.pdfIn PDF document text
    • http://summithigh75.com/clients/867147/File/fovopibu.pdfIn PDF document text
    • http://bagiez.com/userfiles/file/84196172535.pdfIn PDF document text
    • http://globeksa.com/ckfinder/userfiles/files/41506067554.pdfIn PDF document text
    • https://ikima.fr/uploads/file/22084607577.pdfIn PDF document text
    • https://zegabilisim.com/calisma2/files/uploads/movedadinigurigedufaf.pdfIn PDF document text
    • http://www.iso-clean.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160c889e15527e---fufujevumuvozigasi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=2000+britney+spearsPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0003091a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3091A 10480 bytes
SHA-256: bf24e4bbe750f4ea3b832d34de4781254b6758faebc78f53cb304551c2518ba3
font_01_sfnt_off000320eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x320EB 19816 bytes
SHA-256: 45101720fc9bd1f2a0d789051e98b925ca88b21f560ba7afea0e8bea5c66eddb
font_02_sfnt_off0003537c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3537C 16164 bytes
SHA-256: fd494554c7a7a2c4488382a78096c535ff133766c7221992be4f6a58596b2467
font_03_sfnt_off000368f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x368F2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1