Malicious PDF — malware analysis report

Static analysis result for SHA-256 7154b665ae92bcf7…

MALICIOUS

PDF

95.9 KB Created: 2021-07-20 16:29:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 1787e2573f869e440da24e45e1aba4b5 SHA-1: 603e45e39e9da182d542c405b9a9f01798505396 SHA-256: 7154b665ae92bcf7cae89d9282a35dcee4cd68bf2d4c4cff23283cfdb477dc95
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and multiple external URIs, including one pointing to a raw IP address, which is highly suspicious. The heuristics indicate a link farm pointing to compromised CMS uploads and disposable hosting, suggesting an attempt to redirect users to malicious content. The ML classifier and ClamAV detection strongly support a malicious classification, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9929

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://madmojo.com/fckupload/file/vujunazoperiletapejono.pdf In PDF document text
    • http://technoauto.jp/js/upload/files/79267133793.pdfIn PDF document text
    • https://www.waterlooarmsnewforest.co.uk/wp-content/plugins/super-forms/uploads/php/files/d9871fc63d313975574977bab43084e0/vajogopajibexamepafebobi.pdfIn PDF document text
    • http://uniradioweb.info/userfiles/files/bazajeropulapokubatoso.pdfIn PDF document text
    • https://emilline.dk/ckfinder/userfiles/files/lurotuzanilikis.pdfIn PDF document text
    • http://stavbyhes.cz/ckfinder/userfiles/files/93345534051.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/sms37btd72q9fdf1a9larlh3c9/82963517479.pdfIn PDF document text
    • http://watthaistuttgart.de/userfiles/file/27721632319.pdfIn PDF document text
    • http://www.icodar.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078d6a4148d6---runoreja.pdfIn PDF document text
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/1b2e2e9ea9dc8910d470e37e9069cc71/73676006990.pdfIn PDF document text
    • http://chi-kara.net/userfiles/file/14619314433.pdfIn PDF document text
    • https://kayakbranson.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a53b8751d15---mopeliwabaloneritazi.pdfIn PDF document text
    • http://marketypik.pl/zdjecia/fck/file/57252565849.pdfIn PDF document text
    • https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/96c3d945eb979d78c38e2b7654c65095/gidaduguxosozenevuledaz.pdfIn PDF document text
    • https://butchercurnow.com/img/shop//contents/fenofef.pdfIn PDF document text
    • https://sf-tfi-pgu.uz/wp-content/plugins/super-forms/uploads/php/files/c637b0d9728b6a3d654bccfa7ea67dc9/baxafurutagitotadigugubi.pdfIn PDF document text
    • https://mimpiindah168.com/contents//files/samiseniriza.pdfIn PDF document text
    • http://rotarybrescello.it/userfiles/files/vijamapujemugovukabit.pdfIn PDF document text
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b74661e9ec1---nakuvij.pdfPDF link annotation
    • http://zxpgw.com/userfiles/file/padezi.pdfIn PDF document text
    • https://xn----7sbabak5acz7byau.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/04ed6f9d78682998891dd702e8221bfe/73443851844.pdfIn PDF document text
    • http://sendedianqi.com/upload_fck/file/2021-6-17/20210617211238988396.pdfIn PDF document text
    • http://amuseonline.com/absite/userfiles/file/70670735151.pdfIn PDF document text
    • https://bangprice.combangprice.com/beta/cms_image/file/voteveroriv.pdfIn PDF document text
    • http://www.kreasoft.mx/wp-content/plugins/formcraft/file-upload/server/content/files/16072aa2812409---nubejezurajejumuduxadus.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=valid+void+and+voidable+contractPDF 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_off0001166d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1166D 17124 bytes
SHA-256: 0d367ad3d8ecbef32f2bd8c4dbf437004750199ca4d3e6f035513c1e4d4c2e4a
font_01_sfnt_off000142a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x142A1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00015ab8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15AB8 10368 bytes
SHA-256: d7a58ff133405f9054a699d0dcb04650906e4520eb84ea1aa80d11dfbe4e4b0b