Malicious PDF — malware analysis report

Static analysis result for SHA-256 22cffad8de23b9e0…

MALICIOUS

PDF

87.2 KB Created: 2021-06-28 01:18:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 63495bec33282b221c8da78fc4b7b543 SHA-1: 974e0004389bf8ae19c1cc48d15bb04fdeef35b9 SHA-256: 22cffad8de23b9e0479d835bc8663fbfd2b398a73b7abca3a6085858ca09fccb
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains numerous embedded URLs pointing to compromised WordPress sites, suggesting it's part of a link farm designed to lure users to malicious content. While no scripts were explicitly extracted, the nature of the URLs and the detection suggests potential exploitation or phishing attempts.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://philabc.ru/uplcv?utm_term=class+12+chemistry+important+questions+with+answers PDF link annotation
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607796b6b5311---xekajisiroj.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/84c9ca154457c2bb08b32091dec1a331/351784022.pdfIn PDF document text
    • https://hotelritariccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607be6eb4eaca---woxunufofa.pdfIn PDF document text
    • https://rrvchefs.com/wp-content/plugins/super-forms/uploads/php/files/64257ca9bfa3ccf46fb7cdb6586fc0af/nijajatobolonokemunojipov.pdfIn PDF document text
    • https://laxmigrouppune.com/wp-content/plugins/super-forms/uploads/php/files/2cbcfd17c29f1c6c68f2eb1e2a94487e/wepefuzosabivuviropu.pdfIn PDF document text
    • https://rrvchefs.com/wp-content/plugins/super-forms/uploads/php/files/10ebf8d1384da4065e6fc100d8c96488/netazirapulis.pdfIn PDF document text
    • http://chonburi33.com/userfiles/file/kifadebowogito.pdfIn PDF document text
    • https://www.chortho.co.uk/wp-content/plugins/super-forms/uploads/php/files/rhku94ghgcl1mef1nlck32a3hu/lupivawukenaw.pdfIn PDF document text
    • https://djennebeads.com/nbloom/fckuploads/file/14380928256.pdfIn PDF document text
    • https://www.propertyfilevault.com/wp-content/plugins/super-forms/uploads/php/files/94c4e821419b0a2b45f445e07e71faa4/kexasos.pdfIn PDF document text
    • https://urbanplace.me/wp-content/plugins/super-forms/uploads/php/files/53ea5a3d49364fb2078f40643de957c1/dugususolulavudusili.pdfIn PDF document text
    • https://sardavetri.it/userfiles/file/39917394453.pdfIn PDF document text
    • https://www.mercato.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160cf926569dd4---govexur.pdfIn PDF document text
    • https://medsplus.us/admin/images/file/zenidusogoraxajikuzuf.pdfIn PDF document text
    • http://synerfreight.com/syner_upload/images/files/jajebuwasoro.pdfIn PDF document text
    • http://thm-holding.ru/wp-content/plugins/super-forms/uploads/php/files/0f8b1d4fb8c8603502a6220092cb602a/pafikisawudur.pdfIn PDF document text
    • http://kino-profi.com/wp-content/plugins/super-forms/uploads/php/files/2c2577f51f567dec7723e03d06b7359d/fekuti.pdfIn PDF document text
    • https://salvatoredivilio.it/userfiles/file/soroditajek.pdfIn PDF document text
    • https://arizonalightingsales.com/wp-content/plugins/super-forms/uploads/php/files/0a2726e8f88759133d17a0457e651cef/moridan.pdfIn PDF document text
    • https://agribusiness.pk/wp-content/plugins/formcraft/file-upload/server/content/files/1607ed928a8d33---74787235541.pdfIn PDF document text
    • http://bclgrouptt.com/userfiles/file/8902300475.pdfIn PDF document text
    • https://www.hediyevideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c6a0ed37f3c---35420559154.pdfIn PDF document text
    • https://kakvkusno26.ru/wp-content/plugins/super-forms/uploads/php/files/3cbb6408b8d6e6ceadcfe2665a2c239d/gekowuwelupumosawox.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_off0000ef89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF89 11288 bytes
SHA-256: 40d88dbf96d52b3659b6f0f62f000b00090cc7011fd138453c6ea968e827d148
font_01_sfnt_off00010a07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A07 17372 bytes
SHA-256: 36a802af24829795eb6b47f74ccd844ecf051cb4eb380dba6c8c370561f1a9c3
font_02_sfnt_off00013751.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13751 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.