Malicious PDF — malware analysis report

Static analysis result for SHA-256 13cd2df2148bba21…

MALICIOUS

PDF

131.2 KB Created: 2021-07-13 13:22:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 2cfd4b072baf1abfb7bf79cf78e4d067 SHA-1: e2c1f23347d48b76bad33dd850079274cf8c8d09 SHA-256: 13cd2df2148bba2189ffd2e1dbf1eb5286af6a280c7ccc234705c4d46ab83141
176 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of external URIs and IP address literals indicates an attempt to lead the user to a potentially harmful external resource.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9830

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://crysiq.ru/uplcv?utm_term=with+whom+in+tagalog PDF link annotation
    • http://myafmc.com/clients/a/a5/a51d49d85de18111a3d718c63a5e5081/File/badigumiferumepowagarovo.pdfIn PDF document text
    • http://lifestyleufa.ru/wp-content/plugins/super-forms/uploads/php/files/2b81ae23b8366e2571420422042aa68f/80236309669.pdfIn PDF document text
    • https://www.a2zmedical.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607e2947f21ed---lalimesivabefero.pdfIn PDF document text
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e0fa6ae4975---62365982615.pdfPDF link annotation
    • http://hotelclinton.it/userfiles/files/88307726522.pdfIn PDF document text
    • https://briljant-maleri.se/UserFiles/files/natupuzesigopakezozulu.pdfIn PDF document text
    • https://pluviaterra.mx/wp-content/plugins/super-forms/uploads/php/files/2a1c625794b8aa2bea4144861aee30db/dukazele.pdfIn PDF document text
    • https://pinotcar.com/wp-content/plugins/super-forms/uploads/php/files/86b88a37b0a4b1e5a6b47e99ffbef4d6/68563966770.pdfIn PDF document text
    • http://www.gcsystem.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1606d9bd838103---92614936705.pdfIn PDF document text
    • https://marbellamohali.com/wp-content/plugins/super-forms/uploads/php/files/e6315635e10dd757050cb6f234d51241/24125594369.pdfIn PDF document text
    • https://nuregio.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607309f52625a---dajesurum.pdfIn PDF document text
    • http://camionespanamericana.com/userfiles/file/60215823629.pdfIn PDF document text
    • https://tecsal.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca915e1ce0---32528654456.pdfIn PDF document text
    • https://westcoastmovers.ca/wp-content/plugins/super-forms/uploads/php/files/n29st85k1kh3glooc7sfdn5qbk/8773258256.pdfIn PDF document text
    • http://dangkykinhdoanhkiengiang.com/upload/ck/files/6939181022.pdfIn PDF document text
    • http://bjzjygj.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/makedakodukaniwodekori.pdfIn PDF document text
    • https://laxmigrouppune.com/wp-content/plugins/super-forms/uploads/php/files/8f5113f1716816d70ad72998e7f8290c/siripixinegetovetigadofux.pdfIn PDF document text
    • https://wholisticvibrations.com/wp-content/plugins/super-forms/uploads/php/files/9df43f1fd891aa486df9804ad26c9176/46516805546.pdfIn PDF document text
    • http://www.allatpatikapecs.hu/images/file/pejatizolizekom.pdfIn PDF document text
    • https://www.pietri-automobiles.com/wp-content/plugins/super-forms/uploads/php/files/uda1ufvhqfo15u018iri29n508/51589858149.pdfIn PDF document text
    • 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00017e93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17E93 16244 bytes
SHA-256: b1ef7b52ed35dfd01120c19ee4193d967dc828f2fc549fe1a2d8c3c5029b4647
font_01_sfnt_off00019476.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19476 1908 bytes
SHA-256: f1a1d9b47b5eee2fade882070c3332651c81c60b8e604f9a9b670748226e5382
font_02_sfnt_off00019d40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19D40 19716 bytes
SHA-256: 4d8cf24d8bb57edfaa7eaf8cdec20643a269ac4fba2c5cf26a64810602ff8753
font_03_sfnt_off0001d018.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D018 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_04_sfnt_off0001e82f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E82F 10232 bytes
SHA-256: 20133089b55a7e85806b303ca4c1affdbd1feb6ce8c19694d8dd44e9e223a3c4

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