Malicious PDF — malware analysis report

Static analysis result for SHA-256 584833756fe0a311…

MALICIOUS

PDF

86.9 KB Created: 2021-06-25 13:03:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 90bc97b4a9b2de43ef17707d651681ec SHA-1: 4042279e174aacf786564a2b1793b1e4080c00ce SHA-256: 584833756fe0a311bbb94097df793bbe9c86f121fd88585e6f6fc3f75de2d04d
156 Risk Score

Malware Insights

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

The PDF contains a link farm, directing users to multiple external URLs, some of which are hosted on compromised CMS platforms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution through these links. No scripts were extracted, and the document body was unreadable binary data.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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 http://mytmbc.org/fckimage/file/puwaxogubidadopugisot.pdf
    • http://soldearenales.com/galeria/files/98633831045.pdf
    • https://hmjrgoldhockey.org/wp-content/plugins/super-forms/uploads/php/files/cc0352be5afba7fba19985ac6fa432ed/rizefibivufonekotesulutu.pdf
    • http://www.marcelasemper.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087c434769db---napowejuxaravulaxarilofif.pdf
    • https://robinio.de/wp-content/plugins/super-forms/uploads/php/files/2bdprbcb2rac8b88rd5t3ighb0/71804334927.pdf
    • https://trichynext.com/wp-content/plugins/super-forms/uploads/php/files/f007b4574d07fdca85ec2f3c2c53a419/65682021385.pdf
    • http://luckyassessoria.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606d9aaea7ff4---95401115383.pdf
    • http://kaplanpm.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073ed54aa86d---vanawijog.pdf
    • http://hydrem.ru/images/file/mofidaz.pdf
    • https://www.dekleinewerf.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16079ed142b78d---povutibovivok.pdf
    • http://www.brennholz-heinlein.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606f252b9c281---52509387418.pdf
    • https://www.coconutlodge.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071d2f91fdf6---35101822066.pdf
    • https://stmarys-perthamboy.com/upload/File/wovozotokiwufef.pdf
    • http://gat-asset.com/CKEdit/upload/files/26115609074.pdf
    • http://pinzimoniofiumicino.eu/userfiles/files/99178522043.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=spring+2021+countdown
    • 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_off0000eea2.bin
0f1ff720b0de22cbf884415a67564110d3f71f3a28705050e2364165f1bec965		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEEA2 18364 bytes
font_01_sfnt_off00011e78.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11E78 16792 bytes
font_02_sfnt_off0001368f.bin
05dad497b37a248704da2fbe490909ad97d4bd57bc65cfcb0134f2e74dcdf1f8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1368F 10736 bytes

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