Malicious PDF — malware analysis report

Static analysis result for SHA-256 adeb05533ce762ec…

MALICIOUS

PDF

85.0 KB Created: 2021-07-06 21:49:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: d741de036f5a998c4ba567239023b9ce SHA-1: f741c5f19b92f3ef539a99bc6a806cb5d262fa0f SHA-256: adeb05533ce762ecd40abe6aa5474547918cb2bda394d3c8ff6d0266e6069851
156 Risk Score

Malware Insights

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

The file is a PDF identified as malicious by ML classifiers and ClamAV. It contains a large number of external links, many pointing to compromised WordPress upload directories, suggesting a link farm designed to redirect users to malicious sites. The presence of these links and the nature of the hosting indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

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.medicalart.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16090e9a06988a---75805999065.pdf In PDF document text
    • http://provia-events.de/pics/fotos/1/file/fotibowudekumamofirinogol.pdfIn PDF document text
    • http://drinkandshrink.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160aea4fb63e2f---xuton.pdfIn PDF document text
    • http://andreagarciam.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096d40c2ecd7---78371265954.pdfIn PDF document text
    • http://www.timtransportes.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/1607a5773d59bc---38217069790.pdfIn PDF document text
    • http://anhbanglaw.com/userfiles/file/jakulezoro.pdfIn PDF document text
    • https://xn----7sbbjg7ctfs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/126a48db80ee0662b91574ca0b068f01/zoxodowamagixiderak.pdfIn PDF document text
    • https://magerp.org/upload/files/76066962612.pdfIn PDF document text
    • http://ballarioarchitetti.eu/userfiles/files/96979827533.pdfIn PDF document text
    • http://www.adatechotomasyon.net/wp-content/plugins/formcraft/file-upload/server/content/files/160b8dd3c872e7---6412515199.pdfIn PDF document text
    • http://sanders-scottfamily.com/clients/26926/File/fozujufaxomaxovixopuwer.pdfIn PDF document text
    • https://www.audioclinica.pt/wp-content/plugins/super-forms/uploads/php/files/3d4s2rf4p3ve2sa6obhl1d3oos/85860581416.pdfIn PDF document text
    • http://castel.lu/userfiles/files/tipexob.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/r6nmo4j0v3094hui8n5fmv6nqq/19036739188.pdfIn PDF document text
    • http://lowndes85.com/clients/d/d3/d39312ffd46aa2fbcc4e4de04d96a17f/File/32633130564.pdfIn PDF document text
    • https://alakharia.com/public_html/userfiles/file/92090306163.pdfIn PDF document text
    • http://salonlomi.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16091cf3b7081d---77771557353.pdfIn PDF document text
    • http://nadiadsa.org/userfiles/file/panenejajufekadukonat.pdfIn PDF document text
    • http://prattsofdouds.com/clients/d/d8/d85aab9f4bcbae69c8358f7a9990a0b1/File/simamubusisesazoxe.pdfIn PDF document text
    • http://otoozevran.com/resimler/files/15026399103.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/57438609916.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=butterless+cream+cheese+frostingPDF 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_off0000e75d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE75D 17600 bytes
SHA-256: 7b49be6a180ffc58e93cd56979defc9fefb15daa031b6fa933f30033eb0c6805
font_01_sfnt_off000115d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115D3 10936 bytes
SHA-256: de23acd0f590f26b9e9ed9b230f9869014c5f7f14161aaac8c43a4dc36ead8b6
font_02_sfnt_off00012f0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F0E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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