Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e3e4698749c70df…

MALICIOUS

PDF

87.7 KB Created: 2021-06-28 12:49:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: de0ed0bcf932019ac8a968bc2e25888b SHA-1: e6c31f418ef38c830406ac51039226199d06bc4c SHA-256: 2e3e4698749c70df115589d77244321746221e54673b2718542c137f1b0c986f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded URLs pointing to compromised WordPress sites, indicating it functions as a link farm. Heuristics like 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' confirm this behavior. The ClamAV detection and ML classifier strongly suggest malicious intent, likely to redirect users to phishing pages or download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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://kino-profi.com/wp-content/plugins/super-forms/uploads/php/files/7d127ebc127b4324d7064994e4c3eddc/95279478275.pdf In PDF document text
    • https://lostsoulsmemorialnj.org/wp-content/plugins/super-forms/uploads/php/files/90a8e170bc10e04eb56b0692338c5528/toruremawidepovudorugeg.pdfIn PDF document text
    • https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1608626731ec03---lifivitewile.pdfIn PDF document text
    • http://automotiveenergy.cz/userfiles/file/502532678.pdfIn PDF document text
    • http://asdgolfclubtoscana.com/writable/public/userfiles/file/dageduwozakuxaputezuxiwe.pdfIn PDF document text
    • http://cuatudongnhatrang.com/uploads/files/majanijapimenexifopotun.pdfIn PDF document text
    • https://www.expoagrogto.com/wp-content/plugins/super-forms/uploads/php/files/tut3k1vbupeuu3ivs30ulkcl54/22566789197.pdfIn PDF document text
    • http://inspiredindianfoundation.org/uploads/loxepijinaleboba.pdfIn PDF document text
    • http://www.marcado.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a8b34229306---tasogemevidovowagi.pdfIn PDF document text
    • http://kryotherapie.net/neu/userfiles/file/68818704100.pdfIn PDF document text
    • https://nothingbutsafetyglasses.com/userfiles/file/xojilatefusodigagomi.pdfIn PDF document text
    • http://qtjdb.com/UploadFile/2021/05/16/file/20210516_135135_138.pdfIn PDF document text
    • https://www.ibyservice.com/wp-content/plugins/super-forms/uploads/php/files/cbcb1192c252f207c91b3c44306a90a7/litatomasak.pdfIn PDF document text
    • https://paardenwelzijnscheck.nl/app/webroot/files/ckeditor_files/files/varorirebalozopawujazerog.pdfIn PDF document text
    • http://bizwd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b56b8d16631---58126344954.pdfIn PDF document text
    • http://eltonltd.ru/sites/default/files/uploads/kuxikokudixa.pdfIn PDF document text
    • https://www.kngroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c6440776f9---zalomexogenigobini.pdfIn PDF document text
    • https://hoovermaids.com/wp-content/plugins/super-forms/uploads/php/files/44b1884df31a66b4acac29b3251a0a39/vaxixogipofumeruvuf.pdfIn PDF document text
    • https://beautifullifeuk.com/wp-content/plugins/super-forms/uploads/php/files/035070c4db910fcb9fea407fed56e3fc/67779479388.pdfIn PDF document text
    • http://nena-artspace.com/ckfinder/userfiles/files/wawexagivobowogitum.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b74c09525e---2557204363.pdfIn PDF document text
    • http://www.qookspot.kitchen/wp-content/plugins/formcraft/file-upload/server/content/files/16085747baf2c2---kavazipe.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=conflict+of+the+story+the+lotteryPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f33b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF33B 17924 bytes
SHA-256: 0ed466e80baa5d2a819d12b6db9390f1f64824fc6331207d043763b03ce6043d
font_01_sfnt_off0001224f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1224F 10416 bytes
SHA-256: b4f1caed51cf5d80516576ce458968a75e588872c9f422bcdd55b89a4fee5b2c
font_02_sfnt_off000139e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x139E8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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