Malicious PDF — malware analysis report

Static analysis result for SHA-256 04470e2e99106a52…

MALICIOUS

PDF

88.0 KB Created: 2021-06-26 22:28:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 163b5b700bd8524a789f972e6687f43d SHA-1: 5815ac9d688c6e96149ea332d81d34ba64340b73 SHA-256: 04470e2e99106a5233eb0e0804c384f9555cb670bae074559566c96bdab1c360
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a high-confidence ML classifier and ClamAV detection. It functions as a link farm, directing users to numerous distinct hosts, many of which appear to be compromised WordPress sites. The primary purpose seems to be to funnel users to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://miet.hu/kepek/37176722610.pdf In PDF document text
    • http://thementalhealthadvocates.org/files/userfiles/file/nomozimosetemimar.pdfIn PDF document text
    • http://www.medical-psychology.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160acc10311a31---velevesezifalejenadojibeb.pdfIn PDF document text
    • https://event-connections.net/wp-content/plugins/formcraft/file-upload/server/content/files/16084006e146fa---kitovekodijizevami.pdfIn PDF document text
    • http://www.loockuniformes.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/16075ba78f29ed---47624533988.pdfIn PDF document text
    • http://unseretochter.ch/images/file/2357474073.pdfIn PDF document text
    • http://kamnitikamini.si/upload/files/tuzunudumajiketido.pdfIn PDF document text
    • http://yuseigachi.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16092b1e76a058---29506122274.pdfIn PDF document text
    • https://directprocessors.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087da9adeafa---bujepiliko.pdfIn PDF document text
    • http://taiyoaquris.cn/upload/userfiles/files/20210619134547.pdfIn PDF document text
    • https://nikken-engineer.jp/export/sd205/www/jp/r/e/gmoserver/8/6/sd0748886/nikken-engineer.jp/fckeditor/upload/file/2774737793.pdfIn PDF document text
    • http://bagiez.de/userfiles/file/vimidit.pdfIn PDF document text
    • https://trsbarriersdirect.com/wp-content/plugins/super-forms/uploads/php/files/vdc5rg3odhlp2fsi7n67d8irum/71142472080.pdfIn PDF document text
    • https://rebates.forex/wp-content/plugins/super-forms/uploads/php/files/kdnon3igpm6ne7q7sagl1h5nh3/7261597647.pdfIn PDF document text
    • http://hattrick-sports.com/wp-content/plugins/formcraft/file-upload/server/content/files/160867fe5627e4---vegomubazataxojetamiz.pdfIn PDF document text
    • http://dirabrealtors.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d2183837b1d---91065775415.pdfIn PDF document text
    • https://horizontire.com/userfiles/file/32116350049.pdfIn PDF document text
    • http://www.benvenutialmare.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2849ac40da---890578291.pdfIn PDF document text
    • https://shotclock.ca/wp-content/plugins/super-forms/uploads/php/files/f337b11496ae257c3aa64a286d0a4ee3/42709648798.pdfIn PDF document text
    • http://www.commandinglife.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a256fc8a656---ziridewiwirerovoz.pdfIn PDF document text
    • https://ambientltg.com/wp-content/plugins/super-forms/uploads/php/files/7e74ff3e5e0b63ad6d00662489674073/76415385272.pdfIn PDF document text
    • https://www.lamuccacompany.com/wp-content/plugins/super-forms/uploads/php/files/da6972c34fbb1457eddca165b4c36a7b/64280676936.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093e64f93a78---sunoxugipetedag.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=feel+short+of+breath+but+notPDF 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_off0000f632.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF632 10436 bytes
SHA-256: 3931dd7ce4c5d7b8af9790c077977888a6f835b82b7dd020f758443657139b65
font_01_sfnt_off00010dcc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DCC 17152 bytes
SHA-256: 2823d07a89e00f5288569ab8ce11904b34a1b3646254ed0d5f917741d5b185b9
font_02_sfnt_off00013ac8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13AC8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1