Malicious PDF — malware analysis report

Static analysis result for SHA-256 32b906e8b56d7bcf…

MALICIOUS

PDF

71.6 KB Created: 2021-09-05 16:16:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: dc1296c0d9f9fce65307171435af34fb SHA-1: 97b4fa54c477750d9cbf86a9a4086d2d27d6c123 SHA-256: 32b906e8b56d7bcf03480ee18c2c5177c499148f3638904c125e350dbd31c3b5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9893

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://pixomot.ru/uplcv?utm_term=manuale+starter+kit+arduino+pdf PDF link annotation
    • http://bigband-ulm.de/userfiles/files/fiwamidimubop.pdfIn PDF document text
    • http://aimic.com/userfiles/file/sotoxirifolokemidamewejid.pdfIn PDF document text
    • http://www.deadclan.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609777657d9a9---43445169620.pdfIn PDF document text
    • http://dighakanchaninternational.com/FCKeditor/file/wenojisuzedonaridimu.pdfIn PDF document text
    • https://lamaisonducoeur.ca/upload/editor/file/13321005126.pdfIn PDF document text
    • http://chrislahoda.ca/userfiles/file/92057307587.pdfIn PDF document text
    • http://planao.com/ckfinder/userfiles/files/15568986287.pdfIn PDF document text
    • http://www.onlinetemsilci.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075a06ec1593---87406936299.pdfIn PDF document text
    • http://sellmysayarah.com/userfiles/files/89198143264.pdfIn PDF document text
    • http://songiadahoaian.com/upload/ck/files/vejexogamigemirejoni.pdfIn PDF document text
    • https://bisnismedsos.com/userfiles/file/mosagoko.pdfIn PDF document text
    • https://www.varishastalari.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608996f0be6fc---65713850598.pdfIn PDF document text
    • https://fertilizergranulatorprice.com/d/files/pazumikozumogikogaru.pdfIn PDF document text
    • http://mosvag.ru/img/lib/file/79082782585.pdfIn PDF document text
    • https://myclubowners.com/userfiles/files/rakuwixedifutofado.pdfIn PDF document text
    • https://cherrychile.cl/cherry/uploads/contenido/files/migosorigeguk.pdfIn PDF document text
    • https://www.criteriainvest.com.br/wp-content/plugins/super-forms/uploads/php/files/0lt8uoobv0991eul1e61fm1d7i/jabumewuwe.pdfIn PDF document text
    • https://hondamienbac.vn/userfiles/file/76649517664.pdfIn PDF document text
    • http://argentum.com/wp-content/plugins/super-forms/uploads/php/files/347fen1npgi2m3h6rpvdfctnbj/towojasojejat.pdfIn PDF document text
    • https://www.hdcorp.com.br/wp-content/plugins/super-forms/uploads/php/files/vusj1ut20viajojn823lebrblu/15676462186.pdfIn PDF document text
    • https://lesartsdansmonjardin.com/userfiles/file/20210808225536.pdfIn PDF document text
    • https://osikovo.eu/webroot/img/content/files/xodizavigafijik.pdfIn PDF document text
    • https://www.siemers-deutschmann.de/wp-content/plugins/super-forms/uploads/php/files/eigh9na2269o9rqgcl4habdqhi/58380905763.pdfIn PDF document text
    • http://queuemanagementsystems.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bdb2867021c---77460012391.pdfIn PDF document text
    • https://al-farh-iq.com/upload/userfiles/file/76213368892.pdfIn PDF document text
    • https://prolocolidodisavio.org/ckfinder/userfiles/files/73490189259.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b4df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB4DF 16680 bytes
SHA-256: 31390c7166eecd998f84312a6f20bd871da1f181f8d1572f3d0c4fbf13f2c368
font_01_sfnt_off0000e03a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE03A 10676 bytes
SHA-256: 16cf6c026aa107082a1c1b4925fd6dd1a1cc4cc98a9a499750a3909d035c946e
font_02_sfnt_off0000f8cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8CF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1