Malicious PDF — malware analysis report

Static analysis result for SHA-256 08e46aff892c21e8…

MALICIOUS

PDF

118.3 KB Created: 2021-09-05 01:14:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 4b98ed4190854f2d13248071efc009ac SHA-1: af99316dd90239028679994122f7d83797c9ec1d SHA-256: 08e46aff892c21e8fee790e02a4bdacd40fe2d44a045ca090fee5c96b3bbcd4d
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised CMS upload storage or are part of a link farm hosted on disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to phishing or malware distribution sites. No scripts were extracted, but the structure and URL patterns suggest a phishing or credential harvesting lure.

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 http://www.auditsi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094562f2eb9e---1527940627.pdf In PDF document text
    • http://enjoyisagenix.com/ckfinder/userfiles/files/91191100858.pdfIn PDF document text
    • https://korzo-galeria.hu/files/file/sapapoporomifewevojom.pdfIn PDF document text
    • http://mineraux-et-lithotherapie.fr/ckeditor/upload/files/xikosojokezodib.pdfIn PDF document text
    • https://branchennachweis.eu/userfiles/file/87654468921.pdfIn PDF document text
    • http://westernmaki.com/uploads/files/momowuk.pdfIn PDF document text
    • https://hylyt.co/wp-content/plugins/super-forms/uploads/php/files/961e01aa5b47fb39f2bf7ac5c4ab3cdc/nopiwetodemagokifiro.pdfIn PDF document text
    • http://gesgo.de/userfiles/file/78433176788.pdfIn PDF document text
    • https://windsbs.biz/files/file/58333705583.pdfIn PDF document text
    • http://gyarmatilovastorna.hu/userfiles/file/pazodagipalimuwugapij.pdfIn PDF document text
    • http://romengo.com/ckfinder/userfiles/files/mafeg.pdfIn PDF document text
    • http://orem.mn/uploads/files/19441683534.pdfIn PDF document text
    • http://lichnyiybrand.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1612feef4da397---winusejelasu.pdfIn PDF document text
    • https://viettrungson.com/media/Files/salunokoketufavisazegesu.pdfIn PDF document text
    • http://hebammenglueck.de/ckfinder/userfiles/files/juremizufiji.pdfIn PDF document text
    • http://aceonlinementors.com/userfiles/file/puwagawifevojurijuw.pdfIn PDF document text
    • http://www.canadiantreasurer.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a80a958d4f1---89839091545.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=wind+tunnel+design+calculations+pdfPDF 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_off000164a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x164A1 20524 bytes
SHA-256: c3255f81c6d0a9b3474f54bec4aa23411ad1521f72cd67418e99d8a38bdb1028
font_01_sfnt_off00019a9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19A9F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001b2b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B2B6 10788 bytes
SHA-256: ca1cee0cb1cdcdfd9ee14876160a867bbc0e2e5a6f87f96b40b59e1ecd76fa7e

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