Malicious PDF — malware analysis report

Static analysis result for SHA-256 df85cb34c64e4734…

MALICIOUS

PDF

86.1 KB Created: 2021-08-31 17:31:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 9c0c82ea30d9573f6f18844611143959 SHA-1: 397f5c8e20cec8a164962855832d1e86b61fe8c5 SHA-256: df85cb34c64e47345d5c317fc88f6fae72e5e5dfc04c5ed2a3b0e0e7804f1fd9
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, with many embedded URLs pointing to compromised websites and potentially malicious content. The PDF structure and embedded links suggest an attempt to lure users to external sites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://www.ediliziaindustriale.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a7bcae368a---liderutupexopozilovuj.pdf In PDF document text
    • https://eclearusa.com/images/file/zipowiwu.pdfIn PDF document text
    • http://dpsszczytno.pl/photo/file/14296123389.pdfIn PDF document text
    • https://nikosdimos.gr/userfiles/file/menarukebetotuwupava.pdfIn PDF document text
    • https://arenda1s.ru/wp-content/plugins/super-forms/uploads/php/files/505723f6dd8e4ed5c90010bbbd1f1800/6268962125.pdfIn PDF document text
    • http://a-swiss.com/upload/userfiles/file/fovizegoli.pdfIn PDF document text
    • https://westcoastmovers.ca/wp-content/plugins/super-forms/uploads/php/files/d734sgqtbai87m146noobgusba/totimitaleme.pdfIn PDF document text
    • https://magyar-logyogyasz.hu/fileok/file/69975417600.pdfIn PDF document text
    • https://tanasiri.com/piceditor/file/72817724588.pdfIn PDF document text
    • http://integrotech.pl/zdjecia/file/pifom.pdfIn PDF document text
    • https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/eb4e6a96ac35980b4ef239604dce32f1/lorukedulupiguwaxifuxat.pdfIn PDF document text
    • http://gillsandgeckos.com/userfiles/file/terapurobusuleduzuxi.pdfIn PDF document text
    • https://www.bluegreenshouseboats.in/wp-content/plugins/formcraft/file-upload/server/content/files/160b8245361b45---nalekezedufafetafiwexe.pdfIn PDF document text
    • http://castudio.eu/userfiles/files/29557491176.pdfIn PDF document text
    • https://fairtradeportal.pl/userfiles/file/48945235787.pdfIn PDF document text
    • https://gmonlinestore.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e76ca80b3f7---vivujakaw.pdfIn PDF document text
    • http://az4group.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609f920f80bb6---sozexijilorizav.pdfIn PDF document text
    • http://sip7.online/wp-content/plugins/super-forms/uploads/php/files/e6da28fc61203c7fb58da7e0811d9a43/powifemokefepimi.pdfIn PDF document text
    • https://motionslam.com/wp-content/plugins/super-forms/uploads/php/files/f1f47f4a6f28593b9832b402740281bc/futonisubenozokufuvek.pdfIn PDF document text
    • https://tecsal.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1610d955ec0357---tararufukigawotumuboxap.pdfIn PDF document text
    • https://sevsport.info/wp-content/plugins/super-forms/uploads/php/files/807d3c4b54fed4da32f49c32d1cc4dbc/74263499740.pdfIn PDF document text
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/9cdmhi7nuatnkq0l7qdhmqvip1/62797958370.pdfIn PDF document text
    • https://mosconi.net/userfiles/file/paluwisutokizusaw.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=filmywap+free+bollywood+movies+downloadPDF 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_off0000e9ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9FF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010211.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10211 18272 bytes
SHA-256: 534d3450ec3d9aaac5a3f6297b69e1b3816ee4961e5c47b34537f89b3d40caef
font_02_sfnt_off000130e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130E9 10944 bytes
SHA-256: 82af1b96d95f246cf243a34e7ca511a3ae88c6d3c87df6d15d0be3e13b765dec

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