Malicious PDF — malware analysis report

Static analysis result for SHA-256 54ecbf5456465fb2…

MALICIOUS

PDF

84.1 KB Created: 2021-07-31 18:17:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: aeb74a7ccd769b3a585ae1eb3e0340cd SHA-1: 83771bc9030008e37f32a64f22ce71e211a174c8 SHA-256: 54ecbf5456465fb215d4eaf6dfc19b2187092d0fb5687c2365464e6edb57bb36
176 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links pointing to compromised WordPress sites and IP addresses, suggesting it's part of a phishing or malware distribution campaign. The file's structure and embedded links align with techniques used to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://scissortailfarms.com/wp-content/plugins/formcraft/file-upload/server/content/files/160803b1624126---jifulowisufixewowupok.pdf In PDF document text
    • http://mattstergamer.com/wp-content/plugins/super-forms/uploads/php/files/aildqg4reevodib6c0hm6cpjc3/76153094473.pdfIn PDF document text
    • https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/160867324c4951---suzikuxanu.pdfIn PDF document text
    • http://notariocprietoa.com/notaria/documentos/files/50003891767.pdfIn PDF document text
    • https://urbanplace.me/wp-content/plugins/super-forms/uploads/php/files/f6c1aa2037c05e37128d8098c2ee9ff7/navubekamumojipumipi.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ba53bbdde6---71692846915.pdfIn PDF document text
    • http://www.kzhep.in.ua/wp-content/plugins/super-forms/uploads/php/files/btslpogu6thk2carptcmlck724/dunijuxaworepevetexe.pdfIn PDF document text
    • http://milcontabil.com.br/wp-content/plugins/super-forms/uploads/php/files/prhrcn66ab3gcbu2vcdb7uo6q6/4327373514.pdfIn PDF document text
    • http://curry-box-deluxe.de/userfiles/file/wigekuse.pdfIn PDF document text
    • https://tekdalyapi.com/upload/ckfinder/files/netimoj.pdfIn PDF document text
    • http://alexlunacoach.com/img/editor/file/ruzifivinuzokazega.pdfIn PDF document text
    • http://157.230.241.115/image/upload/File/42300136498.pdfPDF link annotation
    • http://chinoboxingclub.com/clients/36032/File/feviw.pdfIn PDF document text
    • http://caratow.eu/userfiles/file/95564640946.pdfIn PDF document text
    • http://riggi.ru/userfiles/file/58926353173.pdfIn PDF document text
    • https://serka.com/serka/upload/files/lanopilavata.pdfIn PDF document text
    • https://malashealthcare.com/userfiles/files/tefoludixefem.pdfIn PDF document text
    • https://glosunspa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e1f865f2176---42768207697.pdfIn PDF document text
    • http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/feanc2kipg6jus37ehlinmn77a/82859041462.pdfIn PDF document text
    • https://torrentclub.vip/wp-content/plugins/super-forms/uploads/php/files/8iqrflj7euu8s4i5s05tc7v9uu/64667000761.pdfIn PDF document text
    • http://miroslaws.com/ckfinder/userfiles/files/vumoxukabesiti.pdfIn PDF document text
    • http://subventionsbetrug.de/wp-content/plugins/super-forms/uploads/php/files/pa5ja1hfjd2vfht625qv8443ma/gobifozegiwetufofokusez.pdfIn PDF document text
    • http://elenasteele.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ce6eb706a84---81638775892.pdfIn PDF document text
    • https://nobleanimalsanctuary.org/wp-content/plugins/super-forms/uploads/php/files/tmp/29382738819.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=square+kumihimo+disk+templatePDF link annotation
    • 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_off0000e528.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE528 10968 bytes
SHA-256: 1fc2f83bad8664bb7532920e86cc6c4e736d1fb62d131a577ff03b6d3ef83db9
font_01_sfnt_off0000fe66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE66 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011678.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11678 16784 bytes
SHA-256: 7aeb1c75c31458ccb258a104ee1c4952ff2d73e376fe0221c9f6b7865b8ca74d

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