Malicious PDF — malware analysis report

Static analysis result for SHA-256 9776627140a604f7…

MALICIOUS

PDF

84.2 KB Created: 2021-06-25 16:45:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 3344e60f8d76ddba5716280a8a6c41db SHA-1: cdf83f5cf443dc0b49f8c2c9303147831ec2051b SHA-256: 9776627140a604f774c3686a65afc61fc60da286f9c3efdef2daf559a2e16770
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous URLs pointing to compromised CMS uploads, likely to distribute further malware or conduct phishing attacks. The presence of multiple distinct hosts and the structure of the links suggest a coordinated effort to host malicious content.

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 https://patriot.ch/wp-content/plugins/super-forms/uploads/php/files/r0p1tdbcd6ssk95gkvqdmeg6kj/sovizasesokalikapivo.pdf
    • http://www.wallisandemmanuel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb455492ff7---36895249309.pdf
    • https://saftanton.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160cdef7682ee5---99597355143.pdf
    • https://laihouston.com/wp-content/plugins/super-forms/uploads/php/files/6eeb7868b4cd9a7051fc08283df000b1/4456593012.pdf
    • http://www.urbanwaterways.info/files/81682785839.pdf
    • https://f1com.ge/wp-content/plugins/super-forms/uploads/php/files/4c772c15554550706e175a1990e379f2/43191950968.pdf
    • http://www.morenoroofing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609de5b8e67d9---sevetekak.pdf
    • http://bpsstudio.hu/uploads/53964461818.pdf
    • https://jollytime.ru/wp-content/plugins/super-forms/uploads/php/files/cb2bf26cce1deb0e95b7e5f12e87c514/xafekitawasozufilojixaxo.pdf
    • http://apvn.info/userfiles/file/96775799342.pdf
    • https://www.ciabrini-immobilier.com/wp-content/plugins/super-forms/uploads/php/files/d069jfgoofjscr8makuef9cbu4/1494997244.pdf
    • http://dossalas.com/wp-content/plugins/super-forms/uploads/php/files/d5ed33da5ecdd454571d3ddfae2851cb/guwazi.pdf
    • http://pamat.ro/UserFiles/file/26745117681.pdf
    • https://g-ortho.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160ba722b6b3ab---rizofifub.pdf
    • http://halvani.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bbeeb295752---dopeloxegopidibupovupebo.pdf
    • http://pebyte.com/wp-content/plugins/super-forms/uploads/php/files/l33nf51u5ev73sqtnu66h0jfia/lupiw.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=watch+tyler+perry%27s+acrimony+online+free
    • 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_off0000e37d.bin
0a4ed9f363cf3cea10f5fceef41c3ca39741f590ec25f8626b6056ff2325380a
pdf-font-stream PDF embedded font (sfnt) at offset 0xE37D 18052 bytes
font_01_sfnt_off000112b7.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x112B7 16792 bytes
font_02_sfnt_off00012ace.bin
856dbe7051fe92f8e7ec91cada573585d4f52e66c0a4957124abc7c4769d4a79
pdf-font-stream PDF embedded font (sfnt) at offset 0x12ACE 10884 bytes