Malicious PDF — malware analysis report

Static analysis result for SHA-256 09fa035ec6ef7063…

MALICIOUS

PDF

86.1 KB Created: 2021-08-20 19:37:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: bcd69009cdc6158aa5193cbb6d922ea4 SHA-1: 8c9bf2f4e9820a5e6c636edc643606241d9c6a01 SHA-256: 09fa035ec6ef7063ca3eef136a90ff8faa547f22fc9c682ab2d039946da27ed9
156 Risk Score

Malware Insights

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

The file was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous URLs pointing to compromised WordPress sites, likely to host or redirect to malicious content. The PDF structure and embedded links suggest an attempt to lure users to these external resources, potentially for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://mikepromedia.com/wp-content/plugins/super-forms/uploads/php/files/49ol00r4ls6fs22g5d88op5ci0/julumatuxekom.pdf In PDF document text
    • https://carthink.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609c934843892---80076111529.pdfIn PDF document text
    • http://bilagroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fb3bf3c0b3---56799373940.pdfIn PDF document text
    • https://havanic.com/cache/fck_files/file/9839179846.pdfIn PDF document text
    • https://www.emma-solutions.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608b84629894f---vipukonewonibotoveso.pdfIn PDF document text
    • https://mindweave.co.uk/wp-content/plugins/super-forms/uploads/php/files/lrheqsg3j5b64je6c2cu93l889/63663437465.pdfIn PDF document text
    • http://aytekinpolatel.com/image/files/pagadepu.pdfIn PDF document text
    • http://comp-art.ru/userfiles/file/webena.pdfIn PDF document text
    • http://www.drop-lok.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b8d5ec608e5---foxoxuxelilor.pdfIn PDF document text
    • http://svenstavik.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090ba3f8fd14---32181485739.pdfIn PDF document text
    • http://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b0687c5c735---92841584615.pdfIn PDF document text
    • http://xn--o39a91gvwm83kbsn.net/FileData/ckfinder/files/20210730_AD7111AA97F6AFAD.pdfIn PDF document text
    • http://abington1964.com/clients/865474/File/16796446603.pdfIn PDF document text
    • http://annassteen.com/ckfinder/userfiles/files/4094859955.pdfIn PDF document text
    • https://dienlanhbachkhoa.info/upload/files/topasunarelidetow.pdfIn PDF document text
    • http://www.caslyn.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1611f79f73eb12---75604431300.pdfIn PDF document text
    • http://heryeryesil.com/resimlerfiles/23020863162.pdfIn PDF document text
    • http://dogalakustik.com/depo/sayfaresim/file/74286395573.pdfIn PDF document text
    • http://ipvoicenj.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609af8eb76d60---dikusipotokumepejavivem.pdfIn PDF document text
    • https://reflexlighting.com/wp-content/plugins/super-forms/uploads/php/files/58921a631db941d42768bafbab571b58/lexivojeligifuf.pdfIn PDF document text
    • https://www.modianodesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099f18d37230---33711747524.pdfIn PDF document text
    • https://europacreativaeuskadi.eu/files/galeria/files/36945459335.pdfIn PDF document text
    • https://zazilha.com.mx/wp-content/plugins/super-forms/uploads/php/files/d96412a442c80f0c0135bb25176e7b6e/gokijakubijesepavajo.pdfIn PDF document text
    • http://businessplan-capalpha.eu/mbp/upload/images/images/upload/ckfinder/robabiniruk.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=what+is+an+assignment+fee+for+a+leasePDF 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_off0000e611.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE611 20440 bytes
SHA-256: e57a91eb77bc129afa248521638f6b7e4a4f015857eebd3a89c4518808fc3845
font_01_sfnt_off000119df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119DF 10656 bytes
SHA-256: fd3eb9b5a13812d0e60985a913fb6296e4c35c0442f20ba8128f533404586740
font_02_sfnt_off00013215.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13215 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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