Malicious PDF — malware analysis report

Static analysis result for SHA-256 60f2fbb841f083dc…

MALICIOUS

PDF

84.5 KB Created: 2021-09-06 10:11:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 34235df3beef02311cf9e0cb858fdf3e SHA-1: e7c9e2e8fd5d688b7aee289cd484516194ac3c5d SHA-256: 60f2fbb841f083dc2e08d1a6d5deb7e87cc3211842921b79dcd8062e7543c543
156 Risk Score

Malware Insights

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

The PDF contains numerous links to other PDFs hosted on compromised websites, indicating a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly suggest this PDF is malicious, likely serving as a lure for phishing or malware distribution. The embedded URLs point to compromised CMS upload directories, further supporting the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://queure.ru/uplcv?utm_term=brosur+keramik+roman+2018+pdf PDF link annotation
    • https://winpoasia.com/ckfinder/userfiles/files/dosisowoxenafalokawo.pdfIn PDF document text
    • https://chocoinmobiliario.com/wp-content/plugins/super-forms/uploads/php/files/80d13d4a6d730e1760443b649c79c7aa/11370685300.pdfIn PDF document text
    • https://www.geosuiteonline.de/wp-content/plugins/formcraft/file-upload/server/content/files/16079032c33192---98739631188.pdfIn PDF document text
    • https://patriot.ch/wp-content/plugins/super-forms/uploads/php/files/18eagrg5qt5vdg2bhr73mpch4s/faviw.pdfIn PDF document text
    • http://provia-events.de/pics/fotos/1/file/67669708128.pdfIn PDF document text
    • https://lokmangal.co.in/wp-content/plugins/super-forms/uploads/php/files/9101cd3a9d68578a04333aad331c3a71/zurifisepulijiwolag.pdfIn PDF document text
    • http://reclaimsplus.com/wp-content/plugins/super-forms/uploads/php/files/959542cfbfeb8084914c10763df83cc9/jeruxupilejafaxuxus.pdfIn PDF document text
    • https://prsnashville.com/wp-content/plugins/super-forms/uploads/php/files/b82a7e8d02aa324ff477d64d8400ce08/nuliwebato.pdfIn PDF document text
    • http://beetsom.com/PROGRAM_FCKeditor_UserFiles/file/7490993546098b089e9bb2.pdfIn PDF document text
    • http://furkansigorta.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160708a1ec58f0---godozetaroki.pdfIn PDF document text
    • http://www.onekaddy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac65300e0fd---rewefonulekusexowu.pdfIn PDF document text
    • https://lakeshoresmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/4c72ahqjtefn95vtamasri3cl2/wiwadakekipimop.pdfIn PDF document text
    • https://cornerstonelaw.eu/userfiles//file/69263881465.pdfIn PDF document text
    • https://smilepath.com.au/wp-content/plugins/super-forms/uploads/php/files/992363ff32e0b7997cc5e1b0d09b7fa4/16822065082.pdfIn PDF document text
    • http://asbufestival.com/uploads/FCK_files/file/zelijulirokuruduverume.pdfIn PDF document text
    • http://rajhansnursery.com/userfiles/file/sudaboxobebivineliseluku.pdfIn PDF document text
    • https://hafa-verein.de/wp-content/plugins/super-forms/uploads/php/files/1c16eb43a737a95eaa23e60ec5c5349d/89558185644.pdfIn PDF document text
    • http://al-farh-iq.com/upload/userfiles/file/69490280934.pdfIn PDF document text
    • http://manhchenang.vn/webroot/img/files/dunisesokatopu.pdfIn PDF document text
    • https://ethnicminorities.heephong.org/ethnicminorities/cmsadmin/ckfinder/files/60908969883.pdfIn PDF document text
    • http://www.texaco.bargiel.com.pl/ckfinder/userfiles/files/revad.pdfIn PDF document text
    • https://a2designbg.com/userfiles/file/suwixumufubugunalagom.pdfIn PDF document text
    • https://aurorabersinar2.com/contents//files/velinubikejawagi.pdfIn PDF document text
    • https://forkidsvietnam.vn/wp-content/plugins/super-forms/uploads/php/files/bkpa6t8adlffj2jmcp35d5vr8l/pifopopuzi.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e4ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4BA 17392 bytes
SHA-256: 08d511f59fc164755b9c2c5a11270961f05a3857eebc14affad13344be0591aa
font_01_sfnt_off00011160.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11160 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012977.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12977 11264 bytes
SHA-256: ba359b4410d20cc928fc3430dd2ad5b3631c0ec5dc5f594fd4d6b29f6630906d

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