Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f4a11e35e3017e0…

MALICIOUS

PDF

69.2 KB Created: 2021-09-05 03:52:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 3c502a3d7f6ba5197641e75834fab6b7 SHA-1: bda9266ad2179ca97e1ca64366e04b22fef15886 SHA-256: 7f4a11e35e3017e080d6dfa679c54c9284d528b7157aa77d11f962aeaaddbdbc
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF contains embedded JavaScript and numerous external links, many pointing to disposable hosting or compromised CMS uploads, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The embedded JavaScript likely facilitates the redirection to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://lovesushiscv.com/uploads/files/madomopadefipipowuv.pdf In PDF document text
    • https://fleuriste79.fr/ckfinder/userfiles/files/rarejinezafedagibobave.pdfIn PDF document text
    • http://kasargod.net/uploads/file/bawudanesokokimawudej.pdfIn PDF document text
    • http://ukrainski-rosyjski.pl/userfiles/file/kututagewaje.pdfIn PDF document text
    • http://dongduong.net/Images_upload/files/farasupakevejelala.pdfIn PDF document text
    • http://www.lightingandhvacexpo.com/wp-content/plugins/super-forms/uploads/php/files/55b8fb9d589f949ece4babaf9069f6e7/mukuzareforu.pdfIn PDF document text
    • http://www.hypnotiseur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160815a5612a51---jemixax.pdfIn PDF document text
    • https://www.travelticket.com.au/wp-content/plugins/super-forms/uploads/php/files/fos5als6osj9gfa98iegkj7nji/58794415221.pdfIn PDF document text
    • http://galluccifaibano.it/userfiles/file/rusuka.pdfIn PDF document text
    • http://edu-family72.ru/content/images/uploads/file/91554857537.pdfIn PDF document text
    • http://tolltisztitas.eu/userfiles/files/kidaranikuwuzagowuvon.pdfIn PDF document text
    • http://aaykpn.com/uploads/editor/files/8205689674.pdfIn PDF document text
    • http://lilit-realty.com/wp-content/plugins/super-forms/uploads/php/files/869fhnh96ikn74srrs9714rcf3/88538932214.pdfIn PDF document text
    • https://leunamgroup.com/wp-content/plugins/super-forms/uploads/php/files/94ec5496fa76a3e9d549103b3f83c6f3/60271386176.pdfIn PDF document text
    • http://www.saraviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080dc398142a---45754890357.pdfIn PDF document text
    • http://modelkyujin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2340cd7d91---xasifaxezonozebubenew.pdfIn PDF document text
    • http://amuseonline.com/absite/userfiles/file/79404445565.pdfIn PDF document text
    • http://mayjack.com/upload/files/80202636481.pdfIn PDF document text
    • http://dspec-car.com/js/upload/files/91882359623.pdfIn PDF document text
    • https://www.charroninc.com/wp-content/plugins/super-forms/uploads/php/files/4238cd6f1194205d1908f05989e9c26a/56966391761.pdfIn PDF document text
    • https://sesconbs.org.br/ckfinder/userfiles/files/73525954797.pdfIn PDF document text
    • https://ckmusicdesign.nl/userfiles/file/vamesorefelepinajeredake.pdfIn PDF document text
    • https://btsis.com/upload/ckfinder/files/22337405149.pdfIn PDF document text
    • http://www.skup.it/wp-content/plugins/formcraft/file-upload/server/content/files/160965df4887ab---17828550503.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=purpura+fulminans+neonatal+pdfPDF 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_off0000b2bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB2BC 10760 bytes
SHA-256: 6c882af0ff230544333e2ed93f890654437ff7e9de842eee083f2194a9c649cc
font_01_sfnt_off0000cb69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB69 14440 bytes
SHA-256: 562c424e2d508954ac19e8f7953420d8e9b4223404dd4343fcc99a5a19ba3cc9
font_02_sfnt_off0000ef6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF6A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1