Malicious PDF — malware analysis report

Static analysis result for SHA-256 bdc7bf36f694afb6…

MALICIOUS

PDF

88.2 KB Created: 2021-09-12 08:37:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 1c009692854c9f925fa28bd5fbb0a377 SHA-1: bb618582c4428a2cd7c80607bfc49fc94d1739eb SHA-256: bdc7bf36f694afb6cae803e686ec1710ea75f43a87e01e562d0550bd1d27aaac
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to disposable hosting or compromised CMS upload directories, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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 http://jadeite.ru/images/file/38923083618.pdf In PDF document text
    • https://bloc-immo.com/images/wutumokid.pdfIn PDF document text
    • http://smelawservice.com/file_media/file_image/file/7444992067.pdfIn PDF document text
    • http://controlsystemco.com/cache/fck_files/file/rixawowuloxev.pdfIn PDF document text
    • http://shop-exclusive.cz/userfiles/file/pamatawadujirasabobepiguk.pdfIn PDF document text
    • https://www.medicalbi.com/ckfinder/userfiles/files/89406132092.pdfIn PDF document text
    • http://veitali.com/upload/files/tumudojuzod.pdfIn PDF document text
    • https://marljivo.hr/userfiles/file/werapewexulasasuxurox.pdfIn PDF document text
    • http://www.golfusa.be/userfiles/files/86475448269.pdfIn PDF document text
    • http://sdsenlex.com/upload/files/bumazuwoko.pdfIn PDF document text
    • https://binarbaidservices.com/public_html/userfiles/file/diwoderijusukavutasomiduf.pdfIn PDF document text
    • http://rainternacional.com/userfiles/file/netexogerikejotifawafifal.pdfIn PDF document text
    • http://homesunshinepharma.com/upload/files/lekoxusikubugijak.pdfIn PDF document text
    • https://weilmclainboiler.ca/fck_upload/file/58284975536.pdfIn PDF document text
    • http://elenasteele.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613849f6992a4---menanubujuzegixo.pdfIn PDF document text
    • http://ktcz.eu/files/files/14326421821.pdfIn PDF document text
    • http://stelmart.ru/userfiles/file/venanavizofudav.pdfIn PDF document text
    • http://davidhammerstein.org/userfiles/file/11949836237.pdfIn PDF document text
    • http://villaturri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b66f64fcd2---tigomipadixorixared.pdfIn PDF document text
    • https://www.drserapkagan.com/wp-content/plugins/super-forms/uploads/php/files/redo6nd0tjlomnj66afcmglc8g/jejikizuguzufe.pdfIn PDF document text
    • https://vhcvietnam.vn/ckeditor/images/files/zerizoveka.pdfIn PDF document text
    • http://lovesushiscv.com/uploads/files/mixajekafojunez.pdfIn PDF document text
    • http://bagpack.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/16133df6019092---89176070900.pdfIn PDF document text
    • http://yurisolomko.com/userfiles/file/18927591457.pdfIn PDF document text
    • http://progettogeometra.it/userfiles/files/walepufebeposav.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=live+cricket+match+show+on+mobilePDF 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_off0000f218.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF218 18376 bytes
SHA-256: 865a56637b50490d8913bde5df339fd99139b7786dd7a690d7474bdcd34be714
font_01_sfnt_off000121f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121F8 10836 bytes
SHA-256: 6330d80e8910076014c903a1d676f5f26c860909f6e488bba8d6c3b0d8f1ebd1
font_02_sfnt_off00013ade.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13ADE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.