Malicious PDF — malware analysis report

Static analysis result for SHA-256 9101b74d4a4dc017…

MALICIOUS

PDF

89.5 KB Created: 2021-08-13 20:58:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: 718160e5ab360eda782a217f6f3f5859 SHA-1: 7a091f2b240906ea2e8714e834bb6de1b41dac89 SHA-256: 9101b74d4a4dc017ca3eaa63aeb551f017b873a23c5aaf1684108d30b9e5f910
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The presence of numerous external links, many hosted on compromised WordPress sites, indicates a phishing or spamming campaign. The ML classifier also strongly indicated maliciousness. No scripts were extracted, but the overall structure and URL patterns suggest a lure designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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=what+is+the+density+of+the+earth%27s+core PDF link annotation
    • https://maydangson.com/vietkiendo/upload/file/86469727902.pdfIn PDF document text
    • http://erbilsunhotel.com/wp-content/plugins/super-forms/uploads/php/files/i3tavbvo5dhd962o895ddlsk44/gopadanep.pdfIn PDF document text
    • https://proff-doors.ru/wp-content/plugins/super-forms/uploads/php/files/df52c04b31cca8686f16fb0eb4157fd6/38112141112.pdfIn PDF document text
    • https://premiumvipbusiness.com/wp-content/plugins/super-forms/uploads/php/files/cacd86ecf88b196fd040bae69b8eed31/nuvujixazuxu.pdfIn PDF document text
    • http://latexindia.com/userfiles/file/sogonanozaxuvej.pdfIn PDF document text
    • http://jpind.pl/userfiles/file/23888218318.pdfIn PDF document text
    • https://holocaustresearch.pl/nowy/photo/file/boraloludu.pdfIn PDF document text
    • http://aksaxena.com/bpms/includes/fckeditor_uploads/userfiles/file/xefek.pdfIn PDF document text
    • http://auchli-appenzeller.ch/userfiles/files/dakokawipepenerixe.pdfIn PDF document text
    • http://daotaoyduoc.org/wp-content/plugins/super-forms/uploads/php/files/d6l22npmjjoe5m3m3fhu02pdl6/20871432765.pdfIn PDF document text
    • https://burlingame.com/wysiwygfiles/file/dixuxowusono.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/pm77s1dgs57tqd987r7egevgf2/24519309598.pdfIn PDF document text
    • https://signaturetowerpune.com/wp-content/plugins/super-forms/uploads/php/files/d4aeqfscqj9ch7726al91nfn90/polutitas.pdfIn PDF document text
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/2dd309544abb71e6d7fbef360152fea1/45758376486.pdfIn PDF document text
    • http://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8ce5885608---nonimo.pdfIn PDF document text
    • https://pointvirgule.ca/upload/editor/file/62480717224.pdfIn PDF document text
    • https://trucraftsmanship.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d3e1a28c32---xuzizira.pdfIn PDF document text
    • http://www.azurwelcomeservices.com/userfiles/file/66557285986.pdfIn PDF document text
    • https://www.financedeclined.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16073a6dc50a3d---20609368674.pdfIn PDF document text
    • https://samavetpharm.com/userfiles/files/lugiwijol.pdfIn PDF document text
    • http://baharemadinah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a47c3fb91a8---88344097947.pdfIn PDF document text
    • http://alvasari.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2d2b6286a1---simawituja.pdfIn 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fad5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAD5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000112e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112E7 16996 bytes
SHA-256: 33aafbea5cf5a453a7114f596c341ad8abec80d8efb6ba5abd116d750969e8f3
font_02_sfnt_off00013f18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F18 10668 bytes
SHA-256: 563c2acff79745c6f3352fda8d852b6bb18287c89d950afa2df1d8fafbd7a64f

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