Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d1602b8c6d25cea…

MALICIOUS

PDF

79.5 KB Created: 2021-09-01 17:31:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: aedc6928cdcfa9eb8b1dcf17b267fbc4 SHA-1: 5526cce9725474e28b31e9824fcc2e94f2e0fcdf SHA-256: 0d1602b8c6d25cea1328623a92a50cc5baeacc99f2990d759253b07b281af885
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous embedded URLs, many pointing to compromised WordPress sites or disposable hosting, forming a link farm. The ClamAV detection and ML classifier strongly indicate malicious intent, likely to lure users to external sites for phishing or to download further malicious content. The presence of external URIs and link farms suggests an attempt to exploit users through deceptive links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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
  • 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.
  • 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://archism.ru/uplcv?utm_term=inspection+and+quality+control PDF link annotation
    • https://playgametoday.ru/wp-content/plugins/super-forms/uploads/php/files/e3264e58c76e532e2f8aa6bca369bffd/zekeki.pdfIn PDF document text
    • http://sadiqandsons.com/userfiles/files/mogejub.pdfIn PDF document text
    • http://mid-europe-ex.com/images/blog/file/moduzazujokej.pdfIn PDF document text
    • https://namlongadc.vn/uploads/news/files/35626829299.pdfIn PDF document text
    • http://www.expo-hotel.com/english/wp-content/plugins/formcraft/file-upload/server/content/files/1612d21a667d42---32012739900.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/qumlvvg9flh2f3emkah6vmn8m7/turudefaxi.pdfIn PDF document text
    • http://kennedy-jackson.com/clients/f/f7/f78508644b517540cdb1549d93860f53/File/29145004961.pdfIn PDF document text
    • http://www.psstrecno.sk/wp-content/plugins/formcraft/file-upload/server/content/files/160811d03a0c99---25010041120.pdfIn PDF document text
    • http://tourbusan.net/FileData/ckfinder/files/20210830_FB7B7943D3E42C9A.pdfIn PDF document text
    • http://www.florentmaussion.net/userfiles/File/xonuxamemetukedene.pdfIn PDF document text
    • http://dakmoto.cz/obrazky/file/31704320647.pdfIn PDF document text
    • https://www.taxikladis.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160746aedb92d3---83781539745.pdfIn PDF document text
    • https://ecef-groupe.com/wp-content/plugins/super-forms/uploads/php/files/5f4crikagllbk1nijunt4hsog1/62650718975.pdfIn PDF document text
    • http://www.rolstoellift.com/wp-content/plugins/formcraft/file-upload/server/content/files/16106e3b18b674---73357824523.pdfIn PDF document text
    • http://moveisgarciadigital.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a8dfe0c7a00---31943549167.pdfIn PDF document text
    • http://kaies.cn/upfiles/file/bajowumiwewekapaforozov.pdfIn PDF document text
    • http://www.vitrierbxl.be/wp-content/plugins/formcraft/file-upload/server/content/files/1607af625d865b---kuzufesawufapazuzarer.pdfIn PDF document text
    • http://metzpaintings.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080b1f677398---76326298779.pdfIn PDF document text
    • https://hopefor.today/wp-content/plugins/super-forms/uploads/php/files/e63c34764d87e861e0a8df4f1a466d2e/mudomivew.pdfIn PDF document text
    • http://maxitelt.no/wp-content/plugins/formcraft/file-upload/server/content/files/1609e00f3ce289---xajarivu.pdfIn PDF document text
    • http://skupka54.ru/upload/m/85275380887.pdfIn PDF document text
    • http://157.230.241.115/image/upload/File/92327906478.pdfPDF link annotation
    • http://stringquartet.biz/web/images/fck/file/74314701255.pdfIn PDF document text
    • http://ebslang.net/_UploadFile/Images/file/77382554067.pdfIn PDF document text
    • http://ophirtonhotel.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1608c2e9101c79---91378694801.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_off0000d525.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD525 10820 bytes
SHA-256: a3171d4554dc9714e5da0bebfd06664808680dbf946d6f9d6620bd4f7149f4be
font_01_sfnt_off0000ee01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE01 16456 bytes
SHA-256: 637c187e0f5726315fff9543e3d85038d9384da4f64e201621ad9e8cd77d413e
font_02_sfnt_off0001181a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1181A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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