Malicious PDF — malware analysis report

Static analysis result for SHA-256 bdbbeb9ac143e0a3…

MALICIOUS

PDF

94.4 KB Created: 2021-08-13 14:27:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-27
MD5: a0d0e8d453738b0031144180f24152fb SHA-1: 4558ccdf78c00ef593b20e83d30637983df88d70 SHA-256: bdbbeb9ac143e0a3e1d2e8601d94a0112c6f6acdb6be0e138c4a6716709110fd
164 Risk Score

Malware Insights

MITRE ATT&CK
T1059.007 JavaScript T1566.001 Spearphishing Attachment

The PDF contains an embedded JavaScript stream and numerous external URIs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

Heuristics 7

  • 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.
  • 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://churchontherockuk.org/home/churchontherock1/public_html/userfiles/files/23052962674.pdf In PDF document text
    • http://pvsystreports.com/wp-content/plugins/super-forms/uploads/php/files/0crk2vt9q7krvo75o5gvbf0ta3/73223953321.pdfIn PDF document text
    • http://albino-pitti.com/pub_img/file/50649926955.pdfIn PDF document text
    • http://precedent.by/_newsite/images_from_html_editor/file/bepuwobemuguwijize.pdfIn PDF document text
    • https://mavismanagement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0f24b871fa---kaxizelevelusodos.pdfIn PDF document text
    • https://marblobathware.com/app/webroot/img/files/bezawazadigebunofok.pdfIn PDF document text
    • http://djpress.pl/Image/files/52343683799.pdfIn PDF document text
    • https://1sis.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608420bbc9d84---furenebo.pdfIn PDF document text
    • http://baharemadinah.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ddc3e29759---xagovi.pdfIn PDF document text
    • http://www.palmettoexpresslanes.com/system/js/back/ckfinder/userfiles/files/musagomiditikamag.pdfIn PDF document text
    • http://brightwayconsultancyservices.com/userfiles/file/sifagidivagegijafubojase.pdfIn PDF document text
    • http://potlista.com/file/files/74011720325.pdfIn PDF document text
    • https://cls-toronto.com/wp-content/plugins/super-forms/uploads/php/files/b0bfa0e723d57b29a6125295658bf0ee/piropixodoke.pdfIn PDF document text
    • https://ckmusicdesign.nluserfiles/file/banudol.pdfIn PDF document text
    • http://zatacorp.com/upload/files/tawokokawaf.pdfIn PDF document text
    • https://ngoctraithaibinhduong.com/uploads/news_file/rafodafuvazagoged.pdfIn PDF document text
    • https://maloneslandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075825ea7fb7---2963590304.pdfIn PDF document text
    • http://associacaoguainumbi.org.br/wp/wp-content/plugins/formcraft/file-upload/server/content/files/160886aa712ad3---94100132249.pdfIn PDF document text
    • https://c4ir.ae/wp-content/plugins/super-forms/uploads/php/files/o7d473metf18u7hmq22p1m3at7/duvegimudenutolose.pdfIn PDF document text
    • http://mimarkamilozkartal.com/userfiles/files/1337974356.pdfIn PDF document text
    • https://monarchwinemerchants.com/wp-content/plugins/super-forms/uploads/php/files/dd370b9d7ff263b1e025b7a3b6ee561f/22843309543.pdfIn PDF document text
    • https://aadhaarretail.com/administrator/imagetemp/file/3552031631.pdfIn PDF document text
    • https://www.lumisolar.pe/wp-content/plugins/formcraft/file-upload/server/content/files/160811c8c2ec59---zogidowazaponifezunetovak.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=sinhala+keyboard+for+android+free+downloadPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f0b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0B9 17964 bytes
SHA-256: 0948c2361c21a6d2a770fa94ee1bf708c6b34f61cc7fa650c8023d6ff5e49c72
font_01_sfnt_off00010a4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A4C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012263.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12263 10692 bytes
SHA-256: 3f8230676f56ee401e80789befcd7abb319c7315333dc978982de5bb9109f914
font_03_sfnt_off00013acc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13ACC 17956 bytes
SHA-256: 03c3771cf5c73611b536f24f4e83a0a6d74c77eeec95195e54e8106bd7513ae8