Malicious PDF — malware analysis report

Static analysis result for SHA-256 60d04dd00b046583…

MALICIOUS

PDF

83.9 KB Created: 2021-09-17 21:18:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 7a43fd85f4cf8144d097ff9115d4d325 SHA-1: c482ba7c0dbdcd56ebf69670efd3dc879f5a1b94 SHA-256: 60d04dd00b04658340b05ab322998edf48079ed657e9eff631de0e38fa72a780
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous external links, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of a 'download button' lure further supports a deceptive intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 http://princeverma.in/uploads/files/26374238865.pdf In PDF document text
    • https://wic-net.com/userfiles/file/162762829.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/161328299a8eb5---viwafikatuvuduneb.pdfIn PDF document text
    • http://location-appartement-venise.com/italie_documents/files/15455826275.pdfIn PDF document text
    • https://ensegun2.com/ckfinder/userfiles/files/xonazusamaju.pdfIn PDF document text
    • http://studioriggio.it/userfiles/files/jujixasavunugemowowape.pdfIn PDF document text
    • http://langeline.com/ckeditor/upload/files/sufawumebedonoxuxo.pdfIn PDF document text
    • https://www.weldcor.ca/public/ckfinder/userfiles/files/76670153330.pdfIn PDF document text
    • https://fleuriste79.fr/ckfinder/userfiles/files/muzovekaserejufupefiku.pdfIn PDF document text
    • http://delfosventures.net/userfiles/files/24062109255.pdfIn PDF document text
    • https://www.institutvzdelavani.cz/files/27039348617.pdfIn PDF document text
    • http://safarang.com/basefile/files/97388260173.pdfIn PDF document text
    • http://www.birapart.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614049c9dfa45---badelunawoviteravituzebed.pdfIn PDF document text
    • http://apmnir.ro/fckfiles/file/83644712834.pdfIn PDF document text
    • http://bergfin.se/wp-content/plugins/formcraft/file-upload/server/content/files/1613a86f3adec6---6900581108.pdfIn PDF document text
    • http://miamiwars.pl/wp-content/plugins/super-forms/uploads/php/files/46a6ff46790e34e847c7a95caca52001/35834596892.pdfIn PDF document text
    • http://iglozawiercie.pl/zdjecia/file/36874703851.pdfIn PDF document text
    • http://jlicentral.com/images/authors/file/nimajev.pdfIn PDF document text
    • https://snabavto.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b2ef74e336---jokivuvuxen.pdfIn PDF document text
    • http://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/ca7e9fb26d2838bd27d81512327ec567/duwezukoruvusevuxikedivuw.pdfIn PDF document text
    • http://tyextractor.com/d/files/zejidadotexawuvitivupidal.pdfIn PDF document text
    • http://www.groupementpecheduloir.com/ckfinder/userfiles/files/vagilemeketuvo.pdfIn PDF document text
    • https://husvagnsexpo.se/wp-content/plugins/formcraft/file-upload/server/content/files/1613c65b393e34---10043623326.pdfIn PDF document text
    • https://thailonghoang.vn/upload/files/fejizij.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=door+slammers+1+unlimited+goldPDF 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_off0000e379.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE379 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fb90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB90 10744 bytes
SHA-256: b13413fb604a7fc21db4dcfe14ce6621d1f1271bb0dc3eba52b3576c5f5f8d8e
font_02_sfnt_off0001140a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1140A 17856 bytes
SHA-256: 0b2bb00ac7a961974cf853e57556944015c1482890b1c81a03c4c5c43c32b239