Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0fa7c5a361baa95…

MALICIOUS

PDF

426.5 KB Created: 2021-06-10 14:10:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 22881f97f62903051d4893bb762f061c SHA-1: e9df7c15f6454908d514afab5239dcbbae547b7e SHA-256: e0fa7c5a361baa950d9bd866189d306c8701f4cccc2c46f8db76a4b2ecbcaff5
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9893

Heuristics 5

  • 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.
  • 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://catamma.ru/uplcv?utm_term=pokemon+sword+and+shield+full+series PDF link annotation
    • https://too.kg/wp-content/plugins/super-forms/uploads/php/files/d75a138becef103ac254f4b69bc7b4c8/valepofolamox.pdfIn PDF document text
    • https://xn--80aaaglcftt5alesfkk7f.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/b2c1936044b9596dbb291d32b60fc22a/jaravof.pdfIn PDF document text
    • https://reifenscho.de/wp-content/plugins/formcraft/file-upload/server/content/files/16085f2ceb7b73---40891805292.pdfIn PDF document text
    • http://www.mostenpo.jp/userfiles/files/takuze.pdfIn PDF document text
    • https://www.andeanskyline.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad4f3156e57---rilofes.pdfIn PDF document text
    • https://www.superioreagle.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ef7fce3967---tetaki.pdfIn PDF document text
    • http://asalsold.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d4ba79bc03---82966574104.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/16085795b92716---89663116088.pdfIn PDF document text
    • https://fertilizergranulatorprice.com/d/files/82688915458.pdfIn PDF document text
    • https://riverasphotovideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c7742e2268---20159447286.pdfIn PDF document text
    • http://asesorgubernamental.com/images/file/xapubopajadepak.pdfIn PDF document text
    • https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077ec05a42f2---juwivatedipubifezeva.pdfIn PDF document text
    • https://nowackleverkusen.de/wp-content/plugins/formcraft/file-upload/server/content/files/160aa838f00d8c---simabojetiludaganajijop.pdfIn PDF document text
    • https://www.lightingsolutionsal.com/wp-content/plugins/super-forms/uploads/php/files/4e6fa9faf98c432ee88d365177b77f38/dabazavatanalubufol.pdfIn PDF document text
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/a3b4d4dcfdef66f62da6f75eecbeeda6/85878531241.pdfIn PDF document text
    • https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b85dd48080---lirikifufos.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0003b9fd.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3B9FD 228236 bytes
SHA-256: 6466a30b3c22dd7b0f35f0c79a2f81d99f505b80670a5eed15442714b8fb976f
font_01_sfnt_off00064acb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64ACB 5304 bytes
SHA-256: a8dbc91e33f26c8461028c67d42035f592d09c4c2a5e387fb76eadc634f023e1
font_02_sfnt_off00065cc0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65CC0 11612 bytes
SHA-256: e2e59db8263f1969ba455360fd368eb344fd096aa2c39c34f8ed857bd4f4e989
font_03_sfnt_off0006837d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6837D 17048 bytes
SHA-256: f42801f50be690746dd47ee7f27edbd3ce585fe593cbd75be6b5dcb94616c281