Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3090ad561dae67a…

MALICIOUS

PDF

96.0 KB Created: 2021-08-10 20:57:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: c34707bb16d47ea8dc34e9c2a1b4ec30 SHA-1: 2d462d1a4bd1be0ebd689f0f606f29240dd3568d SHA-256: f3090ad561dae67a41d355d0d81f7fece98625ba7299f890a19edd0482b98f57
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains numerous embedded URLs, many of which point to compromised WordPress sites and disposable hosting, suggesting a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware delivery via a spearphishing attachment. No scripts were extracted, but the URL structure and heuristic firings are sufficient to infer a malicious purpose.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://laborke.ru/uplcv?utm_term=python+scripting+tutorial+pdf+free+download PDF link annotation
    • https://www.engltg.com/wp-content/plugins/super-forms/uploads/php/files/b0b92dccc7366bc9243760d7e910cb70/viwabajagik.pdfIn PDF document text
    • http://thaoduocquyhiem.com/userfiles/image/file/buxakiva.pdfIn PDF document text
    • https://www.swx.global/wp-content/plugins/super-forms/uploads/php/files/fd9f471bea8cfbd3aa1a84001fc99eb3/vefaxiranaxisusifovi.pdfIn PDF document text
    • http://www.stratcareerservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0a0447419a---jawavenubapogadusinif.pdfIn PDF document text
    • http://unipell.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a0ab1a4ef90---94750319360.pdfIn PDF document text
    • https://fieldofgreen.com/wp-content/plugins/super-forms/uploads/php/files/aca7d8da8004f44131c498890b259962/7861012621.pdfIn PDF document text
    • https://archcosmeticstudio.com.au/wp-content/plugins/super-forms/uploads/php/files/6db461afb7480340f9fc1ea42ed0b656/49893013386.pdfIn PDF document text
    • https://lokmangal.co.in/wp-content/plugins/super-forms/uploads/php/files/451fd8f9cbf3c7c23ebb4e9cdcabb82d/65082764653.pdfIn PDF document text
    • https://www.lightingsolutionsinc.net/wp-content/plugins/super-forms/uploads/php/files/cebc0bfa4b110e00f9b979864f40fec5/pumekivawowubidonoxode.pdfIn PDF document text
    • http://www.asejnrtigers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16075849c064cb---57258542500.pdfIn PDF document text
    • https://www.cedicar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e82cca422a9---9185708260.pdfIn PDF document text
    • http://smartcookieacademy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071adff19858---pimenofibotem.pdfIn PDF document text
    • https://vashadvokat82.ru/wp-content/plugins/super-forms/uploads/php/files/307b6281d6989bfc49883f9fef832e88/42580011474.pdfIn PDF document text
    • http://compie.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16079758b59361---51643490974.pdfIn PDF document text
    • https://genimmigration.com/viking1/uploads/files/zexemutowunipakofuwi.pdfIn PDF document text
    • http://bmhs71.com/clients/c/c9/c97ff408e01126d63256cf68004d6641/File/71292886828.pdfIn PDF document text
    • https://parquesanalbertohurtado.cl/ckfinder/userfiles/files/25781308526.pdfIn PDF document text
    • https://binhruamuinanobac.com/wp-content/plugins/super-forms/uploads/php/files/tf1qi0j92l54cts2uopk1nfk9g/13699444318.pdfIn PDF document text
    • http://maasmartcity.com/userfiles/file/28079865085.pdfIn PDF document text
    • https://areicon.com/images/file/fakalevezuzerub.pdfIn PDF document text
    • https://elitestrategyglobal.com/wp-content/plugins/super-forms/uploads/php/files/6c0ef0a2d5d0b5553a6fad412b2a7eac/25367056639.pdfIn PDF document text
    • http://xn--80ahcjevtqq.xn--p1ai/ckfinder/userfiles/files/41825897723.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_off000114ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114BA 11200 bytes
SHA-256: 8d5a5a05a04eaccfbd09f0fd97a06cd652acc9b356b70fb18b323144262451a1
font_01_sfnt_off00012ecd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12ECD 16916 bytes
SHA-256: da5afa717d9d00c40c62d41b2903bc793774a32a3a457797d751a2eb2776d594
font_02_sfnt_off00015a53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15A53 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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