Malicious PDF — malware analysis report

Static analysis result for SHA-256 7418f969dc502a63…

MALICIOUS

PDF

87.3 KB Created: 2021-07-06 02:23:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 271d27a718d898cf25d6dc319951e61a SHA-1: f96c21633743b7c79b81aed666d7174fb086e582 SHA-256: 7418f969dc502a63158473729e22a2ff21d52866b8bae7ca45c849d40d965678
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics reveal it functions as a link farm, directing users to multiple compromised WordPress upload storage locations and disposable hosting sites. The presence of numerous unknown URLs suggests an attempt to distribute malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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://abril.pe/wp-content/plugins/super-forms/uploads/php/files/30jebdn1067bbbtkvjvgkv8rvb/2101693409.pdf In PDF document text
    • http://www.saraviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160783ca01615b---jowugovono.pdfIn PDF document text
    • http://pelesiuvalymas.lt/i/File/butulojebe.pdfIn PDF document text
    • https://searchkar.com/ci/userfiles/files/subotesanoxulijudonul.pdfIn PDF document text
    • https://fjordancv.info/wp-content/plugins/super-forms/uploads/php/files/c4133fa1a0de1f28da1fac174d5fe759/35061323424.pdfIn PDF document text
    • http://diysmart.net/userfiles/file/51178674228.pdfIn PDF document text
    • http://elmbbq.com/uploads/files/56612740741.pdfIn PDF document text
    • http://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160c1c454886e2---19664052664.pdfIn PDF document text
    • https://frennphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a01f1b81afd---93213943038.pdfIn PDF document text
    • http://protech.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/160830b6e3964d---39266582183.pdfIn PDF document text
    • http://dedanskecasinoer.dk/userfiles/file/rifam.pdfIn PDF document text
    • http://highendschmiede.de/highendfiles/file/fosasanojox.pdfIn PDF document text
    • https://munord.com/wp-content/plugins/super-forms/uploads/php/files/7dcbd56cedaa25c373545d3caff0a95b/gepixobapepu.pdfIn PDF document text
    • https://monacollection.ua/wp-content/plugins/super-forms/uploads/php/files/b96b5d58f4920ddaf5062a836240b822/nizakemuripubutazis.pdfIn PDF document text
    • https://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/32c4a5949d22ab1b9065b7a7bbc8726c/8549261369.pdfIn PDF document text
    • http://614move.com/clients/4890/File/kefev.pdfIn PDF document text
    • http://www.hptindia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160947856bc17a---nulojobelorepatedekivig.pdfIn PDF document text
    • http://mai-colle.jp/userfiles/file/10991286249.pdfIn PDF document text
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/2ea995d725772995c8c90688f7deb9ba/kopebekizakupabesova.pdfIn PDF document text
    • http://bmhs1963.com/clients/7/72/7286fd37811b7a5dece6e69924e4d5ab/File/nadoromelerobaju.pdfIn PDF document text
    • http://pospatrans.cz/UserFiles/File/farizotus.pdfIn PDF document text
    • http://noahjohnsonsark.com/clients/e/ef/ef24418f2336b9480f3353ee42fa3f58/File/vebuwatelotow.pdfIn PDF document text
    • http://kimhoatra.com/upload/fckimagesfile/89531879099.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=remoulade+with+horseradishPDF 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_off0000ef03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF03 18844 bytes
SHA-256: 041452803c7278ec0c900cedf4315a4f1ca56e2abb4122f5c0e6e6df3090480f
font_01_sfnt_off00011fa2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FA2 10640 bytes
SHA-256: 7453140a29d9838c02a00a06fdc7eb73bbdf7e304c465e2f131d5c51090170cf
font_02_sfnt_off0001380e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1380E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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