Malicious PDF — malware analysis report

Static analysis result for SHA-256 7dc2b20a751e6134…

MALICIOUS

PDF

76.0 KB Created: 2021-07-17 15:35:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 0acb2ce825dea3d07018d4870652fb0e SHA-1: d7dab3994992208d60ab3bd8c99a29bb00bcfaf3 SHA-256: 7dc2b20a751e61340696088f38b139558a880fe51307f72c413fb403fcb36678
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable hosting, suggesting a link farm for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of malicious redirection, likely to a site that would attempt to download a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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 http://ippon.lv/uploads/File/dazepefupobametepewepanu.pdf
    • https://buddingheights.org/wp-content/plugins/formcraft/file-upload/server/content/files/16083aead8395b---fosomixubixaforumitak.pdf
    • https://arizonapoolcontractor.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097c0e43d2b4---vifirikoka.pdf
    • https://msr-hudsonproperties.com/wp-content/plugins/super-forms/uploads/php/files/3b3d28b856afb5b2889e96be817f437c/dikexefowofen.pdf
    • https://prolocolidodisavio.org/ckfinder/userfiles/files/jokatadufuj.pdf
    • http://videoacceso.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c681c26cba5---53875201686.pdf
    • http://counterreaction.net/wp-content/plugins/formcraft/file-upload/server/content/files/160c66beed672a---lorepoguzukejogu.pdf
    • http://veronicanealhome.com/wp-content/plugins/formcraft/file-upload/server/content/files/2/160aa372576998---76316488316.pdf
    • https://www.alpha-dynamics.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160c2d43a3d16b---joforomilituwusukefaru.pdf
    • https://abeess.com/userfiles/file/bopipisuzuluwugilesas.pdf
    • https://gbagencement.fr/uploads/file/maxivonojojunamamuzage.pdf
    • https://www.hamburgeriaagricola.com/wp-content/plugins/super-forms/uploads/php/files/ql11ivqhcc1d8siaravf42e0vt/midetisirefigumutepopa.pdf
    • http://www.hangmandigital.com/files/file/duzaleripimikaxura.pdf
    • http://milcontabil.com.br/wp-content/plugins/super-forms/uploads/php/files/aumm8loq98doj0gcs090srcef1/fowuxedugelorokebof.pdf
    • http://cpbnatation.fr/fckeditor/userfiles/file/3424392939.pdf
    • http://clingac.es/d/files/nedapoluzufa.pdf
    • http://andreevmag.com/wp-content/plugins/super-forms/uploads/php/files/edd1316e8ff49eee3df5fb3ffb18a735/puxoragorobinunobunixi.pdf
    • http://irmascaritasdejesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c67784edf84---14197587130.pdf
    • https://xn--78-6kce7dfhb9dwb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/715d5ec3ae54a8a75a8eede089343073/83802715771.pdf
    • http://www.goataxiservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9b24b18088---muwunulorabaninemokedan.pdf
    • https://discoverapartmentsforrent.com/wp-content/plugins/super-forms/uploads/php/files/caffc21f32c35134d53ae4dc4f2b813e/13424798871.pdf
    • http://rheinmotel.com/userfiles/file/rumepuronivem.pdf
    • http://www.morenoroofing.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086ba7470caa---gakoxajuzubukevinazowesi.pdf
    • https://italvaping.com/file/89626901184.pdf
    • http://harissarantis.com/userfiles/files/89007751435.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=pdf+to+drawing+converter+online
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c5dd.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xC5DD 16792 bytes
font_01_sfnt_off0000ddef.bin
623e45ed51f2d9d2aae73952815bea469684cbddfc441445867ad583d1633efd
pdf-font-stream PDF embedded font (sfnt) at offset 0xDDEF 17288 bytes
font_02_sfnt_off00010a5c.bin
6c0b22bf2a79ba23e818758de10e207429d5d6241212f6b70b024086b548e525
pdf-font-stream PDF embedded font (sfnt) at offset 0x10A5C 10636 bytes