Malicious PDF — malware analysis report

Static analysis result for SHA-256 02882d91cbfa7c03…

MALICIOUS

PDF

136.4 KB Created: 2021-08-06 03:45:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: c312067e9c6be553bb773a9b0fcbbf91 SHA-1: 542a063e0daff32fbac690887bf507199764f425 SHA-256: 02882d91cbfa7c039f69a5e2e42b7985a27dfb75fa562e5cd288340eef52a68d
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many of which point to compromised WordPress sites, suggesting a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

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://lightupalife.org.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609dc06e00923---winobebune.pdf In PDF document text
    • https://eliteplacementagency.com/uploads/files/peretivurobu.pdfIn PDF document text
    • https://nam.it/wp-content/plugins/formcraft/file-upload/server/content/files/160fa79fccb50f---jopojesuvuk.pdfIn PDF document text
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/2f120ef595dcbd9f0e9acf2a962dbcc3/52564224597.pdfIn PDF document text
    • https://izharfoster.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608aaec14f8f8---9695084784.pdfIn PDF document text
    • https://aterhesseg.com/up_image/file/59925043434.pdfIn PDF document text
    • https://upchealth.net/wp-content/plugins/super-forms/uploads/php/files/7f5225b7f379ce08ebe954c1077f3750/polujubinudomal.pdfIn PDF document text
    • http://laros.cz/UserFiles/file/34178557098.pdfIn PDF document text
    • http://tachikawa-derma.biz/ckfinder/userfiles/files/mosifudagoz.pdfIn PDF document text
    • http://www.barankayalar.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16097c1367f4d5---sajukilibibajar.pdfIn PDF document text
    • http://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095ea21c1698---siliwek.pdfIn PDF document text
    • http://midiabyz.com/wp-content/plugins/super-forms/uploads/php/files/b29a244090a9f8c2e6df6e108310f3fa/73550772593.pdfIn PDF document text
    • http://abwingsva.com/uploads/files/28002729458.pdfIn PDF document text
    • http://www.brennholz-heinlein.de/wp-content/plugins/formcraft/file-upload/server/content/files/16079b2550fdda---gibebanisiwima.pdfIn PDF document text
    • https://alphaveneers.co.uk/wp-content/plugins/super-forms/uploads/php/files/2f22bc767d55bb0af921fe0978284635/44237612473.pdfIn PDF document text
    • https://www.modianodesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610c55ce55ca3---52090001624.pdfIn PDF document text
    • https://www.saltriot.com/wp-content/plugins/super-forms/uploads/php/files/772fabad54407bd4e72ca27bf7b4d496/rakitoraxuz.pdfIn PDF document text
    • https://www.northernillumination.com/wp-content/plugins/super-forms/uploads/php/files/621d4db2fbcb6a9eff6954c5fdefe776/nafadoruwidusobufajugemap.pdfIn PDF document text
    • http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087b5c9e4948---53714304953.pdfIn PDF document text
    • https://webmodeli.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608108025615a---komonanipavoloxe.pdfIn PDF document text
    • http://www.jindatunnel.com/up_files/file/94089564355.pdfIn PDF document text
    • https://ctsgroups.asia/images/file/70739262995.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=deconstruction+theory+in+literary+criticism+pdfPDF 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_off0001af12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AF12 11100 bytes
SHA-256: 8fe59d6d81665f0995151fb52e9c681e8b0ef21dd2184debfad14023abc49528
font_01_sfnt_off0001c8c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C8C9 19200 bytes
SHA-256: 844444770a9d88be8e507fe9ccc076ccd082a4ec2040e4fc48c547a90d4c6545
font_02_sfnt_off0001f975.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F975 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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