Malicious PDF — malware analysis report

Static analysis result for SHA-256 a95da39d048378d4…

MALICIOUS

PDF

82.6 KB Created: 2021-08-23 10:41:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 7321c1fd5b05355307ef66bb62f90ccd SHA-1: 9007ade856435860527d0428376bb0aab676f9ae SHA-256: a95da39d048378d44d2e26bf552c2b4e2c96065573e384410db717679070e562
156 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. Static analysis revealed numerous embedded URLs, many pointing to compromised WordPress sites or disposable hosting, consistent with a link farm used for phishing or malware distribution. The PDF structure and URL patterns suggest it's designed to lure users to external malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://canevastoilestjean.com/upload/editor/file/44465417665.pdf In PDF document text
    • https://supermagnum-bg.com/ckfinder/userfiles/files/tidemuzolitejutade.pdfIn PDF document text
    • http://softwarefactory.nl/images/file/xafofamonof.pdfIn PDF document text
    • https://www.sibirprokat.ru/ckfinder/userfiles/files/4474213874.pdfIn PDF document text
    • http://dalhousieretreat.com/cote_dor_import/admin/ckfinder/userfiles/files/76989855021.pdfIn PDF document text
    • https://efficimm.fr/userfiles/files/28041999345.pdfIn PDF document text
    • https://cms.blauraum.com/wp-content/plugins/super-forms/uploads/php/files/ed4ce9db466b83cf72d67ef839a5afa9/74564590988.pdfIn PDF document text
    • http://sieuthihatgiong.vn/webroot/img/files/gajukakixibedotojufigeve.pdfIn PDF document text
    • http://retrolondontees.com/userfiles/file/90424993000.pdfIn PDF document text
    • https://alphaveneers.co.uk/wp-content/plugins/super-forms/uploads/php/files/660211dcfbd4ba18b870a9c47e324d3c/tugamikilusurafav.pdfIn PDF document text
    • https://xn--64-mlcufjjaii0l.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/178e434d196b755626577588deb07390/vorerodekowanetepamivu.pdfIn PDF document text
    • http://rogersdesignhouse.com/uploads/files/65760154636.pdfIn PDF document text
    • http://massvt.sk/editor_uploads/system/files/12326822627.pdfIn PDF document text
    • https://aneri12.eu/res/file/11899202452.pdfIn PDF document text
    • http://denis-lefebvre-services.com/fichiers/file/98210781262.pdfIn PDF document text
    • http://serting.eu/userfiles/files/95053938305.pdfIn PDF document text
    • http://adhdadvisory.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8d0119f8e5---timedutajudazakujab.pdfIn PDF document text
    • http://sten.kr/club/data/userfiles/file/20210806054702.pdfIn PDF document text
    • http://unipell.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160d91508eb32f---farekiv.pdfIn PDF document text
    • http://tamilannuaire.com/var/www/vhosts/vps296430.ovh.net/tamilannuaire.com/images/file/68815067804.pdfIn PDF document text
    • http://www.consorcio.edu.pe/wp-content/plugins/formcraft/file-upload/server/content/files/160ad8f814e5dd---topizidoli.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=easy+types+of+poemsPDF 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_off0000e08f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE08F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f8a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8A1 17036 bytes
SHA-256: 126d6bc72abf9053bbc5ab9eac457599482889ea6b9982c2511f16d8337891a8
font_02_sfnt_off00012524.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12524 10276 bytes
SHA-256: e2af8b69d00c83b6a405d7ccd6a494093829e4598d24347579a77b5e2e8f3fb1

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