Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6da3712cf49828e…

MALICIOUS

PDF

82.8 KB Created: 2021-08-15 03:02:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: d9d409806f69f2bf940b09c1bfda367c SHA-1: f1ad26bb012365ac9226491b969a7b3f14c273ef SHA-256: f6da3712cf49828ea3471d8a8f30641b7659c256c6fc7c1e4571f9d19044dca9
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised WordPress sites and disposable hosting, indicating a link farm designed to direct users to potentially malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with techniques used to host and distribute malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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 http://www.qookspot.kitchen/wp-content/plugins/formcraft/file-upload/server/content/files/160887de4119e2---64937530308.pdf In PDF document text
    • https://weblative.com/wp-content/plugins/super-forms/uploads/php/files/l0dcb0h8m9p0v98lssre97i44r/vudesewevewunatuwivu.pdfIn PDF document text
    • http://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/a61fa8e0e402a06f3c20e8ce6176ed9d/nefadupudimorarubuz.pdfIn PDF document text
    • http://parkwestresidences.com/wp-content/plugins/formcraft/file-upload/server/content/files/160772483035c1---pozisifogumakazoxuf.pdfIn PDF document text
    • https://bepxuyenviet.com/upload/files/babiliwute.pdfIn PDF document text
    • https://sieompaysdebray.fr/lesiom/txt/imgadmin/file/65260128688.pdfIn PDF document text
    • https://transport-vehicules.fr/userfiles/file/23636397217.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073050b5363b---70380914148.pdfIn PDF document text
    • https://alirezamirmohammadi.com/images/upload/files/56281723399.pdfIn PDF document text
    • https://inchiriereelicoptere.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160878e4bedaa3---mulasipamafujozinaw.pdfIn PDF document text
    • https://adbetelparaguay.com/wp-content/plugins/super-forms/uploads/php/files/81d9ed5d5a72126e84e5ec2969812e2d/97207841407.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/xegipawavimaf.pdfIn PDF document text
    • http://www.thediethub.in/wp-content/plugins/formcraft/file-upload/server/content/files/160eca9a783435---fekezevamewobixegise.pdfIn PDF document text
    • http://www.sudaff.com/pics/file/39667826097.pdfIn PDF document text
    • http://www.truca-taoules.com//ckfinder/userfiles/files/fiketukefibere.pdfIn PDF document text
    • https://conexus-study-abroad-travel.com/ckfinder/userfiles/file/86575971315.pdfIn PDF document text
    • http://belhavenhighschoolalumni.com/clients/13962/File/nabatu.pdfIn PDF document text
    • http://c2mag.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608959898cc34---717204085.pdfIn PDF document text
    • http://driver-jazda.pl/upload/file/wumexonoxeriwixit.pdfIn PDF document text
    • http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bbc7a30efbc---8627786329.pdfIn PDF document text
    • http://tavernadelsnoguers.com/wp-content/plugins/super-forms/uploads/php/files/4626a2f456267a4dfd5f29daa0ab9300/12755626504.pdfIn PDF document text
    • http://www.la-rocca.pl/app/webroot/files/files/75009039346.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=fundamentals+of+digital+logic+with+verilog+design+solution+manualPDF 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_off0000e039.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE039 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f84b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF84B 16224 bytes
SHA-256: d1f1aa8f51d4dfdcf0e0fc60cc10d8d5924542bf3f86181aa4d59d7a0e9cdb24
font_02_sfnt_off0001224b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1224B 11152 bytes
SHA-256: 8c61ab3a28851f0bd15cbc8d6942ca405d3c7777912892b2755818c3d8017289

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