Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1326e3226c4153a…

MALICIOUS

PDF

96.3 KB Created: 2021-07-15 20:29:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: f94b98c278ca4625fc5627248be7a1e1 SHA-1: 03105dd2e7077e87a0216193770721d510860818 SHA-256: e1326e3226c4153a02781b7045415a1e2d5e222f66c390bff86c3e1a046c2241
156 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS platforms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The document body is heavily obfuscated and appears to be generated by wkhtmltopdf, suggesting it's not intended for direct user reading but rather as a container for malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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 https://krisoc.ru/uplcv?utm_term=summary+of+the+poem+night+of+the+scorpion PDF link annotation
    • https://bataretak.com/img/files/file/sipogebi.pdfIn PDF document text
    • https://www.pal-kont.hu/wp-content/plugins/super-forms/uploads/php/files/14aa2bd6b58fae77954110384bbafe10/pawigiwibojewo.pdfIn PDF document text
    • http://makaifruits.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e45f1d0dd84---wesolekowojifipewelegan.pdfIn PDF document text
    • http://www.amedna.com/userfiles/files/45987367745.pdfIn PDF document text
    • https://www.lenoir-elec.com/wp-content/plugins/super-forms/uploads/php/files/h2g8e9n8mhguibb345n1lmstii/febotimapefedamiru.pdfIn PDF document text
    • http://irmascaritasdejesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607d828e9ad26---4270961013.pdfIn PDF document text
    • http://skuplaptop.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1607824fe25190---bazidasikibefujapeb.pdfIn PDF document text
    • https://menu2uplus.com/images/file/91875966686.pdfIn PDF document text
    • https://sbsoftware.ro/admin/userfiles/file/32159642670.pdfIn PDF document text
    • https://travelselection.us/wp-content/plugins/formcraft/file-upload/server/content/files/1609c67e5a835b---sogepesajizojatopirat.pdfIn PDF document text
    • https://cottonweb.net/userfiles/file/wuvafetigepopeweg.pdfIn PDF document text
    • https://outsourcedbackoffice.co.uk/wp-content/plugins/super-forms/uploads/php/files/fab8f0e456d52ab6e2602845f3c341f1/bowaxifaranoravudexuzuluv.pdfIn PDF document text
    • http://qunjl.com/userfiles/files/woguzedewof.pdfIn PDF document text
    • https://lion-trading.co.uk/wp-content/plugins/super-forms/uploads/php/files/qqjh0rohggf4au2s6tlgl3hikd/rubevujinugidimimobakowo.pdfIn PDF document text
    • https://gaseg.com/wp-content/plugins/super-forms/uploads/php/files/nsfn4pdoqom1f1kk51j2qm4998/jelirazasozime.pdfIn PDF document text
    • https://hightechrustremovers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a198f607441---19564916524.pdfIn PDF document text
    • https://lescourailleurs.com/upload/editor/file/16597091355.pdfIn PDF document text
    • http://www.molinoag.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b33aa82fb82---68829750862.pdfIn PDF document text
    • http://longarmquiltacademy.com/fckeditor/userfiles/file/wuwutoj.pdfIn PDF document text
    • https://sakitonus.ru/wp-content/plugins/super-forms/uploads/php/files/15ce5ef2b31a22643af01bd7895b0eed/zazajuxiwarodotufa.pdfIn PDF document text
    • https://thriveelearning.com/wp-content/plugins/super-forms/uploads/php/files/022e1371860a59ddee966b4ce9ebf62e/dafut.pdfIn PDF document text
    • http://www.consorcio.edu.pe/wp-content/plugins/formcraft/file-upload/server/content/files/160805d77b3405---32349178328.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011586.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11586 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00012d98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D98 16652 bytes
SHA-256: 78233057577757b4cd2a7b09bc86d8ab5835a9eac5613f048ad993144985e71b
font_02_sfnt_off00015859.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15859 11168 bytes
SHA-256: 97837ffae0297e6fc6d9dd560cee6a4aaa20c30989e30d4b99ede640647b5fe1

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