Malicious PDF — malware analysis report

Static analysis result for SHA-256 e126c301b476cae0…

MALICIOUS

PDF

81.2 KB Created: 2021-09-04 14:11:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 41ebb2db0802f734b993e9ad5755130c SHA-1: 096fea111e3b7395b75243e6fca6fe52707e82fe SHA-256: e126c301b476cae0bd5ceceef16cea0bfcad2b98ff7661561b4aebb87eb3a91d
156 Risk Score

Malware Insights

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

This PDF document contains a link farm hosted on compromised WordPress sites, designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. No scripts were extracted, and the document body was unreadable, but the URL structure and heuristic firings are sufficient to assess the attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/160f99482b7978---17234274066.pdf In PDF document text
    • http://winecellarkeeper.com/ckfinder/userfiles/files/manadalije.pdfIn PDF document text
    • https://www.baileysmilk.com/wp-content/plugins/super-forms/uploads/php/files/94fa19ace78a50b3eaa37651b330b07f/16381463288.pdfIn PDF document text
    • https://amatnieks.lv/pictures/image/luzefajazuwu.pdfIn PDF document text
    • https://vaytieudungtragop.com.vn/wp-content/plugins/super-forms/uploads/php/files/hdfracok43j8joeiv0mf3421rm/matomaferijobuwamivuz.pdfIn PDF document text
    • https://www.onestopnaturalstore.ca/wp-content/plugins/super-forms/uploads/php/files/ttjp985ivoqa5m768nn8dg421d/torira.pdfIn PDF document text
    • https://binarbaidservices.com/public_html/userfiles/file/pikezoxatigomapumedetuvem.pdfIn PDF document text
    • http://universalgroupautos.com/files/others/moluwivurebadino.pdfIn PDF document text
    • https://macleanpinesdrivingschool.com.au/wp-content/plugins/super-forms/uploads/php/files/5bd8a2fde0dd0dcc8f80318c5834cebe/xinixiwaze.pdfIn PDF document text
    • http://kcde.kr/userfiles/file/tujum.pdfIn PDF document text
    • https://amagi.la/wp-content/plugins/formcraft/file-upload/server/content/files/160b05065ee4a8---1585266764.pdfIn PDF document text
    • http://globeksa.com/ckfinder/userfiles/files/75287929589.pdfIn PDF document text
    • https://tlpnw.com/wp-content/plugins/super-forms/uploads/php/files/5c90c6d87d1fccaa3bc7aafdc183c53e/xuzora.pdfIn PDF document text
    • http://hysansam.com/fckeditor/userfiles/image/65935545331.pdfIn PDF document text
    • http://robertoantoniz.com/resources/original/file/91026029210.pdfIn PDF document text
    • http://nakajima-ya.com/upload/save_image/files/koxuzasanikabafexarenubof.pdfIn PDF document text
    • https://lakeshoresmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/0dsu0j6ulgmh5f30le268qgn71/biwupu.pdfIn PDF document text
    • http://c-six.it/userfiles/files/14091908315.pdfIn PDF document text
    • http://podlahyadvere.sk/editor_uploads/system/files/37728595538.pdfIn PDF document text
    • http://alompar.hu/uploads/content_files/files/kagiwusaju.pdfIn PDF document text
    • http://www.mediacomriccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/160bfac12d626a---27736626618.pdfIn PDF document text
    • https://www.certificagreen.com/wp-content/plugins/formcraft/file-upload/server/content/files/161125b1c58ffd---poxorasaxawubixukijogevag.pdfIn PDF document text
    • http://www.molinoag.com/wp-content/plugins/formcraft/file-upload/server/content/files/160866629a0db5---jabexusewugesuwigen.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=kena+upanishad+pdf+in+tamilPDF 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_off0000d71a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD71A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ef31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF31 10636 bytes
SHA-256: 30c01d30138d025cca15c85c8f987b5c91d584aeef06a4483dc5ea4e50f6749b
font_02_sfnt_off00010748.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10748 18364 bytes
SHA-256: e109e66e0b583b912224e644fab01eddc05f323f2ea60fe332f9d38c233f8978

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