Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c4569c93f2b1e28…

MALICIOUS

PDF

107.2 KB Created: 2021-06-25 20:01:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 3f8eb1a68c3593717179cd279613db5a SHA-1: 5c3f7b03544cbf029163c925e098153b1bed7269 SHA-256: 5c4569c93f2b1e28f011f90e466a9f98d6c7fabbe460276f88083691970f3b59
164 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, directing users to various compromised websites, many of which host further PDF files. The presence of a 'download button' heuristic suggests a lure to trick users into downloading additional malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9932

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 https://medvor.ru/uplcv?utm_term=how+to+read+land+title+coordinates
    • https://travelselection.us/wp-content/plugins/formcraft/file-upload/server/content/files/16088eccc5326d---kitiren.pdf
    • https://frasertechno.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d5331be472---1251760763.pdf
    • http://paymentsbusiness.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16094495656dbf---tumibudabosuxapana.pdf
    • https://suhrsmad.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16070002dd0ce2---79388923119.pdf
    • http://www.sbawerribee.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160cad9cde545d---defiko.pdf
    • https://beaufortbond.com/wp-content/plugins/super-forms/uploads/php/files/dc104ce11d00021b2765f8af1ba3d43a/kerugevutowuliwuwopakuni.pdf
    • https://xn--z4qq44i.tw/upload/actfiles/zoxovaj.pdf
    • http://n-production.com/upload/fckeditor/file/pevoweba.pdf
    • https://www.andeanskyline.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c8c3fc7e55---60837100062.pdf
    • https://www.hotel-palladium.gr/wp-content/plugins/super-forms/uploads/php/files/apa7a0clqi0ljfg23a123gg6bi/momewasufo.pdf
    • https://www.synergyheart2heart.team/wp-content/plugins/super-forms/uploads/php/files/vsei1ugat8ilgpvl6fgteocecp/bezujabuwosinamaj.pdf
    • http://merlegdoktor.hu/tmp/77060584232.pdf
    • https://broadstripe.com/wp-content/plugins/super-forms/uploads/php/files/f335c7ddd93ddcb31b34f27e85e56811/8231489420.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd5a6b3fe50---ramekegizowatopovixudazu.pdf
    • https://www.pietri-automobiles.com/wp-content/plugins/super-forms/uploads/php/files/hd7tvi3cgi42mm25ftefg03kgr/waginajotij.pdf
    • http://www.pianoszimmermann.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160bfeee26cbe0---keravizafesidatotixu.pdf
    • https://ercrs.org/wp-content/plugins/super-forms/uploads/php/files/ddrlf7ri8ndvo3dkdllmnips01/vawibofiberasa.pdf
    • https://luminex.pl/upload/file/diripanivanofurawas.pdf
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/160969a4b39445---55426198117.pdf
    • http://villaturri.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092ab2e8a394---supabarofediwaton.pdf
    • https://www.opdrrustukalac.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097775ccdf0f---malomijugowapiremiwomilex.pdf
    • http://socialbomjesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b25d2da28b7---mofuxosik.pdf
    • https://nguyenthelong.net/userfiles/files/xalorotofikiwupan.pdf
    • https://abril.pe/wp-content/plugins/super-forms/uploads/php/files/ob5i2ltkgevnlprndcqb0e8g36/jisujimak.pdf
    • http://jeugdopdewetenschapsagenda.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c2d26933f24---zixokomuduratapibadaxu.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000140e8.bin
7a878d6002b52c89549cc3f1e46608e9504698303bb2cffd4865b002678949fb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x140E8 17672 bytes
font_01_sfnt_off00016fa8.bin
c0298bec2a09d4fc5f40d3544599fdcab99a0b9d78a48c3ccff7416c2614f103		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16FA8 10440 bytes
font_02_sfnt_off0001876f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1876F 16792 bytes

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