Malicious PDF — malware analysis report

Static analysis result for SHA-256 9be06051e9f66cdf…

MALICIOUS

PDF

80.6 KB Created: 2021-09-08 11:48:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: d3bda622cf63f2fe816df63955537ac8 SHA-1: 852a96691e721a1d1e0251bc67b004ddbdf6563b SHA-256: 9be06051e9f66cdf0ac815b8c89469fe4ef5012aedb20d58fbdc1c29a28fc1e5
172 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1204.002 Malicious Link

The PDF contains embedded JavaScript and numerous URLs pointing to compromised websites and disposable hosting, indicative of a phishing or malware distribution scheme. The heuristic firings, particularly 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM', along with the ClamAV detection, strongly suggest this file is part of a malicious campaign. The embedded JavaScript likely facilitates the download or execution of a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://medvor.ru/uplcv?utm_term=pan+card+nsdl+correction+form+pdf+2018 PDF link annotation
    • https://alihuata.com/userfiles/file/82332227156.pdfIn PDF document text
    • http://anchor-m.com/js/upload/files/55416353588.pdfIn PDF document text
    • http://bbmeti.it/userfiles/files/jagatibipixuwidoni.pdfIn PDF document text
    • http://optimus.org.au/wp-content/plugins/formcraft/file-upload/server/content/files/1606fc3b7d4417---37863419126.pdfIn PDF document text
    • https://freshchannels.com/home/sites/freshchannels/public_html/ckfinder/userfiles/files/takulotugolore.pdfIn PDF document text
    • http://altinay-law.com/images/file/86959599139.pdfIn PDF document text
    • https://zweefvlieg.net/userfiles/file/27858859947.pdfIn PDF document text
    • https://airbays.com/userfiles/file/33321259951.pdfIn PDF document text
    • http://kpghomerepairs.com/uploads/image/files/vowipoxov.pdfIn PDF document text
    • http://gdfsztal.com//uploadfile/files/xojopiwubodiju.pdfIn PDF document text
    • https://meganimal.pt/site/upload/file/selovifizimegenuru.pdfIn PDF document text
    • https://dpengineers.info/admin/userfiles/file/54973692734.pdfIn PDF document text
    • http://inhome360.ru/admin/ckfinder/userfiles/files/raparugidogev.pdfIn PDF document text
    • http://kirsanov-maslo.ru/uploads/40971977373.pdfIn PDF document text
    • https://www.pal-kont.hu/wp-content/plugins/super-forms/uploads/php/files/65a8fe1c6f2bfa8e137bdacd678b0b99/lukurapudaja.pdfIn PDF document text
    • http://www.molinoag.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607239ecb3041---filobabilebizidatiri.pdfIn PDF document text
    • https://www.clubmanizales.com.co/wp-content/plugins/formcraft/file-upload/server/content/files/1608a1028ab4f9---loruti.pdfIn PDF document text
    • http://pattarasawat.com/ckfinder/userfiles/files/76483289031.pdfIn PDF document text
    • https://forumhotel.by/wp-content/plugins/super-forms/uploads/php/files/thb7smorv6rfi075lehaom8mv3/17732132031.pdfIn PDF document text
    • http://saludocupacionalpso.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/160c755b65d932---gutepowilafuso.pdfIn PDF document text
    • http://albatrossmrn.com/konadnew/userfiles/file/60170224987.pdfIn PDF document text
    • https://www.jemelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611cc336e3590---76921234248.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_off0000d75c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD75C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ef6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF6E 16600 bytes
SHA-256: 7740fbbdbd011500f88897ec3ed042bb50aae6e225365b6986da1c37b65d2a07
font_02_sfnt_off00011a25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A25 11284 bytes
SHA-256: ca302e04199ca01a291a709555418a32050bf6e2d8be452a30f2b826d7c8515b

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