Malicious PDF — malware analysis report

Static analysis result for SHA-256 be3a1f6bd01ff20e…

MALICIOUS

PDF

132.2 KB Created: 2021-08-23 23:35:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: dcf95f3bbf4f2ae44d1200167b010e3b SHA-1: c885db7e8b70e36ee5ccd4419b88949786d2237e SHA-256: be3a1f6bd01ff20e577c146c6fc305dde5d0e7e0ab90c92c09227bbb18a88a04
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating it's a phishing or trojan distribution attempt. The document functions as a link farm, directing users to multiple external URLs, many of which are hosted on compromised CMS platforms. The primary goal appears to be to lure users to malicious sites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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://www.saltriot.com/wp-content/plugins/super-forms/uploads/php/files/517db592ba243792210a5e6390b3f3b3/25486659700.pdf In PDF document text
    • http://goldenbaycruisesagent.com/userfiles/file/87025543455.pdfIn PDF document text
    • https://forkidsvietnam.vn/wp-content/plugins/super-forms/uploads/php/files/iec02jot2g0t1ha5qus4ce7i9m/70123241596.pdfIn PDF document text
    • https://vmkstroi.ru/wp-content/plugins/super-forms/uploads/php/files/fc2e80fe857ccb47c4cf487df03e4c14/pesoxerupeferos.pdfIn PDF document text
    • http://penetrat.ru/files/files/burow.pdfIn PDF document text
    • http://berrybucs1973.com/clients/3/3a/3a2d6910be1067feaf6dc79f90d505e0/File/68228521876.pdfIn PDF document text
    • http://finsura-lifedirect.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160763794e81da---vilarivodaritazixibetel.pdfIn PDF document text
    • http://xycrusher.com/d/files/35587946529.pdfIn PDF document text
    • http://thunderstar.cn/userfiles/file/20210719184632894177546.pdfIn PDF document text
    • http://brookhavenclassof1967.com/clients/0/0c/0ca802fc87877f8c548ddf85495caeb2/File/27546570898.pdfIn PDF document text
    • https://www.pfgpartners.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160acf79f86d6a---wunutetigorepikalunuf.pdfIn PDF document text
    • https://okazdedziecko.pl/_files/Media/file/denemumokakavavetun.pdfIn PDF document text
    • http://iberryhomemade.com/userfiles/files/87578063493.pdfIn PDF document text
    • http://abapaposentados.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160995e956eb70---3496647217.pdfIn PDF document text
    • https://www.brunosistemi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b32a3c8be90---pejefatavafabipijaxukawi.pdfIn PDF document text
    • http://bukhatirhomes.com/userfiles/file/89467590003.pdfIn PDF document text
    • https://www.vedaaz.com/wp-content/plugins/super-forms/uploads/php/files/5745862f8903e4e3c7b7d1b4f20d8a6c/fafisuvesowimubixulipu.pdfIn PDF document text
    • http://eclickapps.in/userfiles/files/feximev.pdfIn PDF document text
    • http://msslink.ru/userfiles/files/43755370532.pdfIn PDF document text
    • https://alnahamgroup.com/userfiles/file/70563335221.pdfIn PDF document text
    • https://bloomeng.com/uploads/15815303755.pdfIn PDF document text
    • http://uhy-th.com/image/upload/files/96557032466.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160781fcc4b9ae---23531324706.pdfIn PDF document text
    • http://ucinnovation.ru/admin/ckfinder/userfiles/files/75600300796.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=what+is+a+top+set+powerliftingPDF 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_off00019cb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19CB2 10716 bytes
SHA-256: b2eb60df923bac40bed53414976808cbacfe8ad171c66924f95f76eda6d84c29
font_01_sfnt_off0001b556.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B556 20788 bytes
SHA-256: 89d72f0f5067edb5c3f3f4bbfaa84d1b802748b837ac37afd627d9b95a43726c
font_02_sfnt_off0001ea85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1EA85 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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