Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8c25fecaef34a04…

MALICIOUS

PDF

79.7 KB Created: 2021-07-03 05:54:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 4cacd2c9845d6cac73b76be5fa074a7b SHA-1: 27d146bb6415c731f88c11cd94d26d23717fe0e4 SHA-256: d8c25fecaef34a04f114c615a9bba15e70258953779cfac60d00ad5b69245985
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple compromised WordPress sites and disposable hosting domains, likely for phishing or malware distribution. No scripts were extracted, but the presence of numerous external URIs suggests an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://cructi.ru/uplcv?utm_term=credit+score+out+of+710 PDF link annotation
    • https://bestcoloringpages.com/userfiles/file/kinalitok.pdfIn PDF document text
    • http://exosportsante.fr/ckfinder/userfiles/files/depeziterefubagej.pdfIn PDF document text
    • https://www.vigo.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160925cab79d9c---19273225888.pdfIn PDF document text
    • https://www.unicodesystems.com/wp-content/plugins/super-forms/uploads/php/files/p8jvi1oo25uk7t2aj1o2for0g3/37726195286.pdfIn PDF document text
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607de8ab0b9db---40067061128.pdfPDF link annotation
    • https://specialbrands.gr/wp-content/plugins/super-forms/uploads/php/files/61f510a2c081e4ef8f08c7e612f8107a/kozobasuralatetutosu.pdfIn PDF document text
    • http://fuga-hotel.com/CKEdit/upload/files/357847396.pdfIn PDF document text
    • http://amuseonline.com/absite/userfiles/file/1338350546.pdfIn PDF document text
    • https://www.asahinadigital.com/wp-content/plugins/super-forms/uploads/php/files/lj3gepum6oblrcs28anovbj9nb/mipinowikakuli.pdfIn PDF document text
    • http://www.colegiometa.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/160b9022630b72---82654163222.pdfIn PDF document text
    • http://opakowania-loga.pl/zdjecia/fotki/file/zobafet.pdfIn PDF document text
    • https://www.waterlooarmsnewforest.co.uk/wp-content/plugins/super-forms/uploads/php/files/4d8327ca5922580139dc54f4627ca3a1/nexugawawixozimoj.pdfIn PDF document text
    • http://aksaaydinlatma.com/img/editor/image/file/tudinagixolez.pdfIn PDF document text
    • https://divorcioconsensual.com.br/wp-content/plugins/super-forms/uploads/php/files/a015a4cbb23e803f5b5bbe0ef1390e13/38113036363.pdfIn PDF document text
    • http://chocolatycakes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608db3709486f---mubifaxupedagenegapo.pdfIn PDF document text
    • http://dodici12.ru/wp-content/plugins/super-forms/uploads/php/files/eqstmb6e2sou36r07n3loceuu6/49559074653.pdfIn PDF document text
    • https://enville.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b57c8a75e93---lebazilekamojilaz.pdfIn PDF document text
    • https://kisikana.hr/userfiles/file/91932373701.pdfIn PDF document text
    • http://www.fonfe.com/uploads/files/73954733072.pdfIn PDF document text
    • http://jpmoto.biz/upload_picture/porolibodemonanebogad.pdfIn PDF document text
    • http://fsanaq.com/upload/file/21062017070840825288d53b6zee2n.pdfIn PDF document text
    • http://afghansolar.com/userfiles/file/39320353462.pdfIn PDF document text
    • http://gyobel.itpublic/file/fujalamalesisev.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_off0000d5c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5C9 16284 bytes
SHA-256: 82b290d44f83c7a30bc5f0def51fa1ba2783d4f3195206c912da916aa34457f6
font_01_sfnt_off00010027.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10027 10512 bytes
SHA-256: 50e1ed1eb97463b64f1eff7d03316239ea04d10a9336a2bf4f2337b0bddef369
font_02_sfnt_off00011857.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11857 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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