Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a487f92e6d35ed4…

MALICIOUS

PDF

85.0 KB Created: 2021-09-07 16:33:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 20f4d6997f058a72192371b1a21f95a8 SHA-1: b3baca208dc414c39d33f7bf4e2b77c6966b0c75 SHA-256: 0a487f92e6d35ed401abe7d2bbfe79df05ddcfc21edad3c9729cc149f823e7ad
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many hosted on compromised CMS platforms or disposable domains, indicating a link farm designed to redirect users to malicious sites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. The presence of multiple external URIs and link farms points to a tactic of overwhelming the user with choices, increasing the chance of a click.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://irlanc.ru/uplcv?utm_term=composite+chart+interpretation+pdf PDF link annotation
    • https://ropaalmayoreo.com/images/userfiles/file/doxunoduxow.pdfIn PDF document text
    • http://www.jindatunnel.com/up_files/file/jikilixugij.pdfIn PDF document text
    • http://malifer.hu/upload/file/45420867051.pdfIn PDF document text
    • http://rilta.net/userfiles/files/77384225542.pdfIn PDF document text
    • https://skyzoan.com/cake/beta/userfiles/file/satofepalatesimagu.pdfIn PDF document text
    • http://www.kickcommerce.com/userfiles/file/5660471581.pdfIn PDF document text
    • http://seanmore.com/userData/board/file/matijofijajivavuwif.pdfIn PDF document text
    • http://trainternational.in/wp-content/plugins/formcraft/file-upload/server/content/files/1609a1b9847ee5---zarakonagodol.pdfIn PDF document text
    • http://kbo.pl/ckfinder/userfiles/files/nidatisufafikijasum.pdfIn PDF document text
    • https://www.auditek.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1610cd65f6661a---nefiselimu.pdfIn PDF document text
    • http://pizzeria-millemiglia.de/app/webroot/img/editor/file/4197389888.pdfIn PDF document text
    • http://www.gunyagder.org.tr/wp-content/plugins/super-forms/uploads/php/files/ouq8j2t539jrmc3spef1j7u9k7/manededilupifisokawujiziv.pdfIn PDF document text
    • https://freedomhypnosisnyc.com/wp-content/plugins/super-forms/uploads/php/files/adf17f13078552f0dfa737f0adff8914/sapumajixo.pdfIn PDF document text
    • https://lacaune.hu/userfiles/file/16656827816.pdfIn PDF document text
    • http://aaykpn.com/uploads/editor/files/49959360972.pdfIn PDF document text
    • http://lawfirm.vn/MINH/user_files/file/fiwolusarigito.pdfIn PDF document text
    • https://klcmekatronik.com/ckfinder/userfiles/files/97258599582.pdfIn PDF document text
    • http://aceonlinementors.com/userfiles/file/lofip.pdfIn PDF document text
    • https://autotrilogy.com/wp-content/plugins/super-forms/uploads/php/files/2b96ca5c9202a87a5a43840cdfe4ec1e/30572458214.pdfIn PDF document text
    • http://zelene-centrum.cz/webpagebuilder/ckfinder/userfiles/files/xifititikivurefet.pdfIn PDF document text
    • http://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099a6ad18bdf---zanado.pdfIn PDF document text
    • http://amunt.madteam.net/ckfinder/userfiles/files/12835005484.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_off0000e6f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6F1 10868 bytes
SHA-256: eacd1b366bc60edc593b2acc60e568359211fcdc0b91cb6d0d80777d60d219b2
font_01_sfnt_off0000ffe5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFE5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000117f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117F7 17912 bytes
SHA-256: 7976498c798c54a0a63ef3c98b4ecab5baebced743d97f79ef02afeb42afbbbe

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