Malicious PDF — malware analysis report

Static analysis result for SHA-256 5da85630961ce7f2…

MALICIOUS

PDF

92.3 KB Created: 2021-08-11 05:05:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 5d2189a5f72afdd56a00a2d31e77bd65 SHA-1: b2452316bdd20e5cde2d6fb01c041c185804b48a SHA-256: 5da85630961ce7f2281fbf81d1d0e9ce7a5f97a2f9c88cee2b0c3fd441f9d574
164 Risk Score

Malware Insights

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

This PDF sample was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a high number of links, many hosted on compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. The presence of a visual download button further supports the lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9905

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://ketchas.ru/uplcv?utm_term=new+hindi+movies+in+hd+download+best+site PDF link annotation
    • https://www.darrellstuckey.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e1245b71511---98206108613.pdfIn PDF document text
    • https://storage-in-motion.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fc7b0d30f3f---60491171619.pdfIn PDF document text
    • https://motecx.com/images/file/lobisadonuzi.pdfIn PDF document text
    • https://angelsstaff.com/uploads/file/kowilidalelazunafilesi.pdfIn PDF document text
    • https://ceadersvalet.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7b9a4b9e51---61781158623.pdfIn PDF document text
    • http://an-ocn.ru/ckfinder/userfiles/files/fulibaxipofomuvasozi.pdfIn PDF document text
    • http://www.lukoilmarine.com/ckfinder/userfiles/files/13941755272.pdfIn PDF document text
    • http://metalzilembo.it/userfiles/files/ruxidejili.pdfIn PDF document text
    • https://ontime-taxi.kg/wp-content/plugins/super-forms/uploads/php/files/27d814cf8dce7dedbb72435b611aa29c/fiwol.pdfIn PDF document text
    • http://ndt-tl.ru/upload/file/61614910220.pdfIn PDF document text
    • http://sonnenheizungen.ch/fckeditor/editor/images/file/gilap.pdfIn PDF document text
    • https://www.lightingsolutionsal.com/wp-content/plugins/super-forms/uploads/php/files/532a87287230afb1608d9247e0239c9f/xidifobon.pdfIn PDF document text
    • http://takemehometomatoes.com/ckfinder/userfiles/files/madomaragotele.pdfIn PDF document text
    • http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ff1a77a89a---mosuf.pdfIn PDF document text
    • https://realwebguys.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c68a44bf787---75007191942.pdfIn PDF document text
    • https://cremyco.com/app/webroot/docs/file/sipof.pdfIn PDF document text
    • https://www.kadeavenue.com/wp-content/plugins/super-forms/uploads/php/files/85baf2e34dfb8736e674cf1cb5941679/pazufaduzefarapewejej.pdfIn PDF document text
    • http://chemonova.com/FCKeditor/file/92869337013.pdfIn PDF document text
    • http://reicar.dk/userfiles/file/vigapirile.pdfIn PDF document text
    • http://bnblspecialities.com/userfiles/files/farugizogukad.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9333998013---debaruporaso.pdfIn PDF document text
    • https://ovth.ch/userfiles/files/lifigefajose.pdfIn PDF document text
    • https://cncunse.com/d/files/limovedanimalaxuzibazo.pdfIn PDF document text
    • http://inbond-cn.com/userfiles/file/43153267768.pdfIn PDF document text
    • https://amesmedicalservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7fed6e3842---dedozutox.pdfIn PDF document text
    • http://visualpaint.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608db7655982f---8011430355.pdfIn PDF document text
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fc61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC61 16956 bytes
SHA-256: a805efe3f035f695fd22b50afafd000f20713d1f158f652fe5a884e808728925
font_01_sfnt_off0001285e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1285E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014075.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14075 10680 bytes
SHA-256: cf756f6c3f7b2620ff13eef6031909d6bc970ea75771a4cec97c9c1e33324a68
font_03_sfnt_off000158c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x158C9 2052 bytes
SHA-256: e5258f748d854ee194f9bbf130bc06bb832ebb1c1149390068239288061b797e

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