Malicious PDF — malware analysis report

Static analysis result for SHA-256 3dfd65329199a376…

MALICIOUS

PDF

214.2 KB Created: 2021-07-14 05:37:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: c8e78a6ff5bd475305fa293011c06184 SHA-1: 5b25fcd9b7f623828ed8807c0e8ae02e562338d5 SHA-256: 3dfd65329199a376fb2b69642a15d7ee3979ef11df8240e66825b62236597f37
174 Risk Score

Malware Insights

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

This PDF document was flagged by multiple heuristics as malicious, including a high-confidence ML classifier and ClamAV detection. It impersonates Microsoft and uses urgency lures to direct the user to a malicious URL, indicating a credential phishing attempt. The document also contains embedded URLs pointing to compromised WordPress sites, suggesting a potential distribution or hosting mechanism for malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9304

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://medvor.ru/uplcv?utm_term=does+apex+legends+run+on+mac.
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://medvor.ru/uplcv?utm_term=does+apex+legends+run+on+mac PDF link annotation
    • https://centrobrands.com/wp-content/plugins/super-forms/uploads/php/files/42ffba4778ec5b03769fc08e1806c96c/14049011815.pdfIn PDF document text
    • https://rmissio.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1608ec8acad17c---nipemim.pdfIn PDF document text
    • http://asupuro.com/user_data/image//file/fofinozuzoke.pdfIn PDF document text
    • https://www.golddustdental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e52d215eac8---34666114456.pdfIn PDF document text
    • http://randalljroutson.com/clients/44711/File/32306592790.pdfIn PDF document text
    • https://espaciocultivarte.com/ckfinder/userfiles/files/93122563521.pdfIn PDF document text
    • http://czpohledavky.cz/userfiles/files/rivorufixewujikoruf.pdfIn PDF document text
    • https://jiptv.nl/wp-content/plugins/super-forms/uploads/php/files/859tsgpl1jkguhr0jp0do3snit/vosenuwuzevovaje.pdfIn PDF document text
    • https://teplitsyoptom.ru/wp-content/plugins/super-forms/uploads/php/files/d736ebafe3bff7ff86aa7f27545b8b1d/63762086735.pdfIn PDF document text
    • https://realestateconnect.pro/wp-content/plugins/super-forms/uploads/php/files/cu5vck8m64okrpmibkp3lh5pg7/94783613624.pdfIn PDF document text
    • http://lifemartrealestateconnect.com/wp-content/plugins/super-forms/uploads/php/files/fskf2o60q6p1pglcocouddbq85/93435076273.pdfIn PDF document text
    • https://dewalt-naradi.cz/media/upload/editor/file/69414274606.pdfIn PDF document text
    • http://ejmk.com/ej/upload/files/74020245542.pdfIn PDF document text
    • http://reclaimsplus.com/wp-content/plugins/super-forms/uploads/php/files/fd0d4014289338c2a4798993fb07b582/75295817956.pdfIn PDF document text
    • https://www.higher-energy-trampolineclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c622f59edfb---3822837834.pdfIn PDF document text
    • http://seanmore.com/userData/board/file/52434173181.pdfIn PDF document text
    • https://robertmatzuzi-massagetherapist.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607d652928a92---bodaginutorapelogimizewe.pdfIn PDF document text
    • https://www.infrascale.com/wp-content/plugins/super-forms/uploads/php/files/16f933fff8ca1c475ca8df8247368f0e/rorigexal.pdfIn PDF document text
    • https://keralatemples.info/ckfinder/userfiles/files/zigekoteredivamewukaro.pdfIn PDF document text
    • http://www.vitrierbxl.be/wp-content/plugins/formcraft/file-upload/server/content/files/160719eeb38812---20142160502.pdfIn PDF document text
    • https://giustofiori.it/file/fofigap.pdfIn PDF document text
    • https://carthink.org/wp-content/plugins/formcraft/file-upload/server/content/files/160dc8164a066e---wubebubor.pdfIn PDF document text
    • http://brilspa.ro/userfiles/file///febotivulujuvaja.pdfIn PDF document text
    • https://neoville.ru/wp-content/plugins/super-forms/uploads/php/files/2b5b52abbe77b5306ad3491d66f266a6/bixudukibeborapogunef.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0002c14b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2C14B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0002d95d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D95D 18184 bytes
SHA-256: 8c7405bb26aaa728f27bbd2ea2053bf93c06c0a974c04a15a8cceabcafe3a7c9
font_02_sfnt_off0003093e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3093E 18440 bytes
SHA-256: a58280698d583eab4953253e2859844b642655b15a852f732c1b722dd9c52708
font_03_sfnt_off000326fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x326FA 1708 bytes
SHA-256: c05a3b96c1db912f6371044e8bee14b9734f93d9be5dc92ccb8b42aa61b2109f
font_04_sfnt_off00032f1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x32F1D 10868 bytes
SHA-256: 51c414d115443d83b9bd3891547ded38a3e9fde3bf35af45c2ea9b4f8594d8a6

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