Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa380e0f62fc8a5c…

MALICIOUS

PDF

95.9 KB Created: 2021-08-06 14:57:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: c862cebc39d08d45ce450dad47044f1b SHA-1: 13e0a4f1c0cf6ab8c127a21ba1384e1779623f1f SHA-256: fa380e0f62fc8a5c0bbeb6b6f24e8a718adfe7c400411333bd6430599c831c77
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier. It contains numerous embedded URLs, many pointing to compromised WordPress sites and disposable hosting, indicating a link farm designed to redirect users. The presence of these links suggests an attempt to lure victims to external malicious sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://pistant.ru/uplcv?utm_term=what+is+the+best+paying+slot+machine+in+san+manuel+casino PDF link annotation
    • https://vinisfarm.com/wp-content/plugins/super-forms/uploads/php/files/5d6aa350d59e05e4545d4e30397cea7e/90926693011.pdfIn PDF document text
    • http://www.sempresaude.net/wp-content/plugins/formcraft/file-upload/server/content/files/1606c94394c5ab---dukagevuxapog.pdfIn PDF document text
    • http://oilmachineydy.com/d/files/61956947031.pdfIn PDF document text
    • http://automsystem.com/UploadFile/file/20210528232034062.pdfIn PDF document text
    • http://lotuscourtpune.com/wp-content/plugins/super-forms/uploads/php/files/0b4fd0ef7447700f98deaf1209a071f1/xagafineziwusomom.pdfIn PDF document text
    • https://beautifullifeuk.com/wp-content/plugins/super-forms/uploads/php/files/54c32a1a311cd6968dbf9320d7f7134a/99864924000.pdfIn PDF document text
    • https://www.mii.net/wp-content/plugins/super-forms/uploads/php/files/2791d3a199050d0c79d38ea1c2f114de/92006039807.pdfIn PDF document text
    • http://be1971.com/clients/a/a1/a19be2fc4cf8b198b52f296748481ce5/File/riwetizonabuxufuguniniti.pdfIn PDF document text
    • http://soft-pro.hr/upload/datoteke/firufamipotaxelexit.pdfIn PDF document text
    • http://imcborivali.org/userfiles/file/kuzezinugazulo.pdfIn PDF document text
    • https://baconbites.com/wp-content/plugins/super-forms/uploads/php/files/00lgbhuv9fnt3d7mpa1f0pssf1/lobimolutimu.pdfIn PDF document text
    • http://krindustria.com.br/site/wp-content/plugins/formcraft/file-upload/server/content/files/1610800a396040---midevaxosalatato.pdfIn PDF document text
    • http://toonesk.com/upload/bedes.pdfIn PDF document text
    • http://np-laser.com/upload_fck/file/2021-6-15/20210615015548931186.pdfIn PDF document text
    • https://opsclown.it/ckfinder/userfiles/files/jebemav.pdfIn PDF document text
    • https://dazzlin.co.uk/wp-content/plugins/super-forms/uploads/php/files/29a2a572902ed0535363cf1891e79b50/natuzakofim.pdfIn PDF document text
    • https://newtop-eg.com/userfiles/file/naporozamaxufavafefaw.pdfIn PDF document text
    • http://abwva.com/uploads/files/72028843874.pdfIn PDF document text
    • https://palet-school.com/files/files/10623759350.pdfIn PDF document text
    • https://dazzlin.co.uk/wp-content/plugins/super-forms/uploads/php/files/b02ffe0b9bfc5afda277f874109ee8cb/81236542759.pdfIn PDF document text
    • http://heibldr.hu/FCKfeltoltott/file/58251056819.pdfIn PDF document text
    • http://smithmurdock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8d0a853fee---loruwilinutokezikuripon.pdfIn PDF document text
    • https://llsindia.in/FCKeditor/file/68603142667.pdfIn PDF document text
    • https://rockyhotelsgroup.com/uploaded/files/30181377303.pdfIn PDF document text
    • https://www.histoiresdegroupes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8af8605c0c---xuvebabotadebukanulisi.pdfIn PDF document text
    • http://fabrykakonwersji.pl/wp-content/plugins/super-forms/uploads/php/files/d115acc47f3c79deae35fcdfd71fa987/baledaduponolowo.pdfIn PDF document text
    • http://abpaluso.com/upload/file/gafawubikepafiru.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_off00011158.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11158 11068 bytes
SHA-256: eeb47847d101603cfe19ca92c4ed13426967ddf0733f157bab4a34a2d3f4d421
font_01_sfnt_off00012ac8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12AC8 17012 bytes
SHA-256: 2e8690e14313e587bee675796d4ac25466ccba05c7faa12d3cda998a8986687b
font_02_sfnt_off000156da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x156DA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1