Malicious PDF — malware analysis report

Static analysis result for SHA-256 f02c6c4e145d8c92…

MALICIOUS

PDF

82.3 KB Created: 2021-09-08 17:20:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: e1650aadfe497d5611211c0faea05af9 SHA-1: 04e1fb51dd25254e2132e6d5ea49681a4fe5b51e SHA-256: f02c6c4e145d8c929eefe79df2e19b566887e9fd090ff8107a2d318e7c5b15b3
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

This PDF file was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier, indicating malicious intent. It contains a link farm pointing to various PDF files hosted on potentially compromised or disposable domains, suggesting it's part of a phishing or malware distribution campaign. The heuristic 'SE_ENABLE_LURE' indicates the document likely instructs the user to enable macros or editing to execute its payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9911

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Macro/content-enable lure medium SE_ENABLE_LURE
    Document instructs the user to enable macros or editing — a common technique used by malware droppers to bypass Office macro security settings
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://unitytradefze.com/ckfinder/userfiles/files/jaxikomazitokuminudez.pdf In PDF document text
    • http://abcgsgeds.friendship-match.com/upload/files/zojopudexo.pdfIn PDF document text
    • http://ssatripoli.org/userfiles/file/79558688815.pdfIn PDF document text
    • https://bimore.vn/webroot/img/files/jibowuvokolux.pdfIn PDF document text
    • http://vesimport.ru/userfiles/file/ranarir.pdfIn PDF document text
    • http://dataprint.ie/uploads/file/15894105678.pdfIn PDF document text
    • http://kargo-box.com/uploads/files/36780887528.pdfIn PDF document text
    • https://saigonservices.vn/images/uploads/files/nabif.pdfIn PDF document text
    • https://realxenon.ru/uploads/files/ganavetovomarewo.pdfIn PDF document text
    • https://rmissio.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1613820cbdb466---16781273347.pdfIn PDF document text
    • https://fermuar.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133115db769b---water.pdfIn PDF document text
    • http://ventmetal.ru/userfiles/files/53743365282.pdfIn PDF document text
    • https://luxurytravel-show.com/wp-content/plugins/super-forms/uploads/php/files/ca9d76ba7633bf1cf8471430093226f7/45830907973.pdfIn PDF document text
    • http://svsteinfurth.de/radsportfiles/file/makerobup.pdfIn PDF document text
    • http://www.huescalamagiaenfotos.com/userfiles/files/zotinukile.pdfIn PDF document text
    • http://aarogyamedico.com/userfiles/file/66556420179.pdfIn PDF document text
    • http://audiencefertilization.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/46056689626.pdfIn PDF document text
    • https://impulsa.mantareys.net/uploads/plantillas/files/kejununufebejebitu.pdfIn PDF document text
    • https://lokmangal.co.in/wp-content/plugins/super-forms/uploads/php/files/c3a1a607cd224a0e696b81a89a63a874/2176692395.pdfIn PDF document text
    • https://dentalrud.com/userfiles/file/38898085985.pdfIn PDF document text
    • https://eko-briketes.lv/userfiles/files/sabofoku.pdfIn PDF document text
    • http://khautrangkhangviet.com/upload/img/files/garakaxakidalagovewim.pdfIn PDF document text
    • http://dochoiotovn.com/uploads/userfiles/file/90248235963.pdfIn PDF document text
    • https://gospel-streams.com/asset/ckfinder/userfiles/files/disujagixegobuxis.pdfIn PDF document text
    • http://sromedical.com/file_media/file_image/file/bemovavifutiroga.pdfIn PDF document text
    • https://konferencii.ru/js/ckfinder/userfiles/files/wovinegipozifabobifin.pdfIn PDF document text
    • http://decorstore.eu/upload/file/jelinikekokowabaw.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=macro+in+excel+pdf+filePDF 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_off0000de7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE7C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f68e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF68E 17384 bytes
SHA-256: 10c3ac1e71e71ec1c0bf35718a0c4fedf194b40c53619126a26b6f9d37681d85
font_02_sfnt_off000123d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123D7 10440 bytes
SHA-256: cf5c9f3c23120cfee585083488d3eebf9e5a8a484d347a549731adf78408c3da

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