Malicious PDF — malware analysis report

Static analysis result for SHA-256 334d467b8279dd53…

MALICIOUS

PDF

181.9 KB Created: 2021-07-09 12:23:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 1861949faa9f4b0cf9fc1cbd1fed5f92 SHA-1: 7f686048011bd8749ed13a3af365d6d97ba7fa1f SHA-256: 334d467b8279dd530635096d3d5b19081217d3a7e7d00a4882f8e97019aee9a7
154 Risk Score

Malware Insights

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

The 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, with numerous URLs pointing to compromised WordPress upload storage and other disposable hosting. These links likely serve as lures for phishing attacks or to distribute further malware payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9096

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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
  • 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://www.alapan.org/fckimages/file/29174618373.pdf In PDF document text
    • https://ketgate.eu/wp-content/plugins/super-forms/uploads/php/files/4a1094fbb97111b801d861e1a1e7ca0c/10042065012.pdfIn PDF document text
    • https://medtek.vn/storage/file/migurananevevudaxeduj.pdfIn PDF document text
    • http://festivaldeliteraturadepereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d0871d40a3---dojerene.pdfIn PDF document text
    • https://islandsvefir.is/wp-content/plugins/super-forms/uploads/php/files/h7ogsk45n328msd7tvssetgarq/77437306225.pdfIn PDF document text
    • https://christembassyromford.org/wp-content/plugins/super-forms/uploads/php/files/75f994295b7354342789c5db1af799fb/58312974707.pdfIn PDF document text
    • http://sparkpro.lv/content/file/26040993267.pdfIn PDF document text
    • https://noukos.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1608f9c64c8f0c---vipeduseseviluwo.pdfIn PDF document text
    • http://nuyewrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/76ab63b4aee2abc7d7d092587356256a/19164733153.pdfIn PDF document text
    • https://southernlightingsource.com/wp-content/plugins/super-forms/uploads/php/files/d848911b541770c6ed75590bcae2cb05/9543921420.pdfIn PDF document text
    • https://heykidsletscook.info/wp-content/plugins/super-forms/uploads/php/files/b602170e8a872daa7bff9ac82a00e171/kosenifumiresa.pdfIn PDF document text
    • http://pogologistics.com/ckfinder/userfiles/files/vadorijopufijij.pdfIn PDF document text
    • http://www.nowsingapore.co.id/wp-content/plugins/formcraft/file-upload/server/content/files/1609e82f86b9c7---bonuligajimubuzufexodusot.pdfIn PDF document text
    • http://uniondeautoescuelas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c7866a97d9---28191612976.pdfIn PDF document text
    • http://cuboni.com/uploadfile/hong202107011548334702.pdfIn PDF document text
    • https://snabavto.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071611a937f8---nixelizunukisinerenidito.pdfIn PDF document text
    • https://ohligschlaeger-berger.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c1eaf337ea5---vojadaraxomuzuxegavu.pdfIn PDF document text
    • https://www.cr-sdc.org/wp-content/plugins/super-forms/uploads/php/files/c181278ed176e4e5148c1867f2aa4072/pipedukigobi.pdfIn PDF document text
    • http://uyaviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac65867c347---9835941384.pdfIn PDF document text
    • http://ahkjt.com/upfile/file/diparatirubata.pdfIn PDF document text
    • http://paymentsbusiness.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609db99c78210---gavolirasezudodabi.pdfIn PDF document text
    • http://18554080.com/userfiles/file/17277613971.pdfIn PDF document text
    • http://p-itos.net/admin/userfile/image/file/97875616217.pdfIn PDF document text
    • http://lbhs1965.com/clients/6/6b/6bdd8f708684a1f547efbf97e1630fe5/File/sonojabasovudidoditive.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=myocardial+perfusion+meaningPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0002b612.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2B612 11072 bytes
SHA-256: 1a8b679939d1163c030abe911e555d92586632f387f3357013e7b22a9d578a42