Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a75b25016ca7c8f…

MALICIOUS

PDF

86.7 KB Created: 2021-07-28 15:00:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 8cfdba27e0e500cddd3f134325aaf2b7 SHA-1: cb0aa4e9416bd4fd54c4195e03b2f49a95a9b12b SHA-256: 1a75b25016ca7c8f515f5dcb6c7283355a47f9e36b55633e76cf9739b2916344
156 Risk Score

Malware Insights

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

The PDF contains a link farm with numerous URLs pointing to compromised WordPress sites and other domains, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The file's structure and numerous embedded links are consistent with a tactic to lure users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://www.hungryalex.com/wp-content/plugins/super-forms/uploads/php/files/5suigscueh9g669350f2dk6hr6/59429392478.pdf In PDF document text
    • https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/5b2b28f92a6526e921546c8aaf1fa2ba/bisefirirenaxove.pdfIn PDF document text
    • http://dralituncer.net/userfiles/file/lubasudomugazomexiponako.pdfIn PDF document text
    • http://thegreenlegacykeepers.com/clients/e/e8/e8dc17949b7ef813e9937e453902477f/File/lilaxiras.pdfIn PDF document text
    • https://activepymes.com/pub/file/muginakokuzedezufixobow.pdfIn PDF document text
    • https://caribemed.com/userfiles/file/fobokasomekojikebinoro.pdfIn PDF document text
    • https://maximatrimony.com/ckfinder/userfiles/files/18559505821.pdfIn PDF document text
    • http://pulsrmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c3e3e72436---35068802951.pdfIn PDF document text
    • http://alnoorcity.com/userfiles/file/tisoxigufadibewivezur.pdfIn PDF document text
    • https://www.pennlighting.com/wp-content/plugins/super-forms/uploads/php/files/f81dff3ecd33eb4424a1993bd29f63ea/xilig.pdfIn PDF document text
    • http://asbu.net/uploads/FCK_files/file/58395866141.pdfIn PDF document text
    • http://asdgolfclubtoscana.com/writable/public/userfiles/file/98023637303.pdfIn PDF document text
    • https://soudurelauziere.com/upload/editor/file/43361337757.pdfIn PDF document text
    • https://n-zvuk.ru/upload/file/58413399416.pdfIn PDF document text
    • https://traveletrust.com/basefile/traveletrustcom/files/nuzoxeginitikokitolove.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/cc1b038d5a9cceaa727d5cf1d6218ddc/tikokaro.pdfIn PDF document text
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/vlgbtlot3crbl8m5t8052eucp7/jufanodojezodebo.pdfIn PDF document text
    • http://adainst.com/uploade/files/20210707045524.pdfIn PDF document text
    • http://www.highlandmetals.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607c0709be0c2---42065102546.pdfIn PDF document text
    • http://slbreakingnews.com/ckfinder/userfiles/files/vaxigorexomebapevisulap.pdfIn PDF document text
    • https://keluargamimpi.com/contents//files/75676732331.pdfIn PDF document text
    • http://kameleonhastanc.hu/files/file/59175068730.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=modelo+de+carta+poder+simple+docPDF 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_off0000ea63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA63 19680 bytes
SHA-256: 3dfbb6804ddafc7b7cc404cb3e1de16c5dd5c7144df72c7fb82a08035ee44233
font_01_sfnt_off00011bdc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BDC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000133f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x133F3 10564 bytes
SHA-256: 1bc7a6a1b9955106a86a09ef86ae91799223c06aa14d90e606315aa7e39d1310

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