Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c74fc3071c7aaed…

MALICIOUS

PDF

69.4 KB Created: 2021-09-17 23:57:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 6df8f2307c6c8b465376de9a5829f711 SHA-1: 304531a31e4380c6ad5c5ff02e91a32231df8c09 SHA-256: 2c74fc3071c7aaedc3705044ec66678acb98397a69e405994636bdd756797111
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains an embedded JavaScript stream and numerous external URIs, many of which point to compromised CMS upload directories. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a non-clustered link farm on disposable hosting, suggesting an attempt to lure users to external sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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://argentum.com/wp-content/plugins/super-forms/uploads/php/files/qs8u96ff7vsl1r1eg1ga52oojm/sununujarigadofozudor.pdf In PDF document text
    • http://www.mvdisposal.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141a70be797f---jexodibaxow.pdfIn PDF document text
    • https://encouragingmath.com/wp-content/plugins/super-forms/uploads/php/files/52a8ea6d8561c2d625d9d903261e8553/zopijifumokifopevewix.pdfIn PDF document text
    • http://unsersohn.ch/images/file/57050445811.pdfIn PDF document text
    • https://hizlipin.com/calisma2/files/uploads/93721254621.pdfIn PDF document text
    • http://janjoling.com/public/ckfinder/userfiles/files/luxatarekawixesiwaf.pdfIn PDF document text
    • https://astdubai.co/userfiles/files/84530631131.pdfIn PDF document text
    • https://auf.vn/wp-content/plugins/super-forms/uploads/php/files/1rpqpgik0n7llohgbvccl53i91/12990953747.pdfIn PDF document text
    • https://charterboatdeliverance.com/uploads/files/21222360219.pdfIn PDF document text
    • http://kehlux.lu/userfiles/files/17861280567.pdfIn PDF document text
    • http://volvo-cars.jp/js/upload/files/56793382936.pdfIn PDF document text
    • http://maility.pl/_ADRESuserfiles/file/5565836950.pdfIn PDF document text
    • https://lyna-garage.com/htdocs/cljr/data/files/sumerot.pdfIn PDF document text
    • https://drainscovers.com/wp-content/plugins/super-forms/uploads/php/files/61a4de6801514f75505edc27d8e5d044/25041340754.pdfIn PDF document text
    • http://www.adanakursmerkezi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130355c4ae19---pefumofisisidalavuzedobi.pdfIn PDF document text
    • http://hodoan.net/userfiles/file/xepatadugoron.pdfIn PDF document text
    • http://puebloexec.com/userfiles/file/fijewodunujusuvoregoza.pdfIn PDF document text
    • http://ac-kenigsberg.ru/files/file/20531133991.pdfIn PDF document text
    • http://cityclick.it/userfiles/files/merejo.pdfIn PDF document text
    • https://dolaodong.com/userfiles/file/midibiwafatose.pdfIn PDF document text
    • http://andersonlawdecorah.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/74340990132.pdfIn PDF document text
    • http://cellfruits.com/ckfinder/userfiles/files/naxexejanorimefexot.pdfIn PDF document text
    • https://hijaustabilo.com/contents/files/33730502027.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=modern+combat+5+android+download+freePDF 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_off0000b2f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB2F7 10824 bytes
SHA-256: 38f6605637dfdb4042a5bbd26cfe2a8fa0841f7d7e674e8ced0d87e11a533ca2
font_01_sfnt_off0000cbfd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBFD 14208 bytes
SHA-256: b0503b71cc0a44e3bc2ea4971ac3d7c83e3dab44b2b9b21812ea598e0cb5e22b
font_02_sfnt_off0000ef86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF86 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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