Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff63e7eebf6d82f9…

MALICIOUS

PDF

175.2 KB Created: 2021-06-14 01:59:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 398d3f734c2b5c9f98ec72da352d6937 SHA-1: e758ae8e6f01cd9dde3de2ce5e7d20bd81334888 SHA-256: ff63e7eebf6d82f9eaefdf322088eda208c19aa71e5603bbb81b916496909227
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external links, many pointing to compromised WordPress sites and disposable hosting, suggesting it functions as a link farm to distribute malicious content or phish for information. The presence of embedded URLs and the overall structure point towards a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

Heuristics 6

  • 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
  • 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://laborke.ru/uplcv?utm_term=power+plant+engineering+pk+nag+solution+manual+pdf PDF link annotation
    • http://enjoybowlramenandpoke.com/uploads/files/49554565421.pdfIn PDF document text
    • http://agendatourvietnam.com/hinhanh/file/kewiwikagiweredifowob.pdfIn PDF document text
    • https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/98968f8d71cb4117482dede553143403/gevozedu.pdfIn PDF document text
    • https://siyata.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/16085539b2fe1f---wilutegazonud.pdfIn PDF document text
    • https://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160bdc02141bf3---8483950603.pdfIn PDF document text
    • https://atlastoursntravels.com/userfiles/file/wamudopoludejujuwupu.pdfIn PDF document text
    • https://www.tessilgiada.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608339cce10ac---wosut.pdfIn PDF document text
    • http://jikaramen.com/uploads/files/71635966780.pdfIn PDF document text
    • https://www.ayersworthglen.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ccf8275eb2---movavaniga.pdfIn PDF document text
    • http://www.miamiairportlimo.net/wp-content/plugins/formcraft/file-upload/server/content/files/16074854fb46cd---95178321508.pdfIn PDF document text
    • https://www.hotelamoha.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609ef4349b537---detovefedewumu.pdfIn PDF document text
    • https://bokseinstituttet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160b81f0b2cc9d---nenijeluw.pdfIn PDF document text
    • http://countrysquirefoods.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086e2249947a---65704615550.pdfIn PDF document text
    • http://veronicanealhome.com/wp-content/plugins/formcraft/file-upload/server/content/files/2/160987c5c8621c---waroj.pdfIn PDF document text
    • http://www.rlktechniek.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1606d8e169b690---15251827651.pdfIn PDF document text
    • http://halvani.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a734bf05404---jeduj.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
font_00_sfnt_off00023bf9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x23BF9 4188 bytes
SHA-256: 8fe299ddef60b15652ea18123ccd06cbbffaeeeacfd4d391cf4ff723d1ebaddb
font_01_sfnt_off00024ad0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x24AD0 5516 bytes
SHA-256: ea6b38ceee0051f7a4842779d9376126741bf518c132b3f1ee247e9ebbf78e91
font_02_sfnt_off00025d90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x25D90 15724 bytes
SHA-256: dd9e8e56e0f93e027a2e7bbac22b03a8fbc521ea7b634e381b5e27e74d8f7499
font_03_sfnt_off00029304.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x29304 17216 bytes
SHA-256: ffe44cbd0a02613d41f9f7203f95e777923da11e3e4ee8ee6b67d9d709677dea

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