Malicious PDF — malware analysis report

Static analysis result for SHA-256 f175213114083500…

MALICIOUS

PDF

83.9 KB Created: 2021-09-04 03:54:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 5c061356be19bd783b8022f075119020 SHA-1: eaf93f8da0b6b5eefb8d4d188c68230a2470d8ca SHA-256: f175213114083500fa186d31a30535619697f7e3c084671942bdd4dcd26cfeb5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous URLs, many pointing to compromised WordPress upload directories, suggesting it functions as a link farm or downloader for further malicious content. The presence of external URIs and the nature of the detected heuristics strongly suggest a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://coretry.ru/uplcv?utm_term=air+force+questions+pdf+download PDF link annotation
    • http://2girlstrippin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e1ae96dbb46---54823952488.pdfIn PDF document text
    • http://www.highlandmetals.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1608447288d1d6---magarelodiluniboporovejiw.pdfIn PDF document text
    • http://tilestone-pools.com/i/File/6979854434.pdfIn PDF document text
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/f88387011836813914e58e83ccba184b/23540156804.pdfIn PDF document text
    • https://alice-immo.com/userfiles/file/58657349740.pdfIn PDF document text
    • http://biomehl.com/images/content/files/5165776857.pdfIn PDF document text
    • https://wagaskar.com/media/nivokepigaxawabofokovi.pdfIn PDF document text
    • http://dabien.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/1609e2e975e84e---82069330924.pdfIn PDF document text
    • http://mas.vacations/wp-content/plugins/formcraft/file-upload/server/content/files/160a3a1b60d314---kajanewu.pdfIn PDF document text
    • http://larrysiegellaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/mupififaxajoribu.pdfIn PDF document text
    • http://adaviestransportltd.com/userfiles/file/79938560770.pdfIn PDF document text
    • https://sipare.com.ar/wp-content/plugins/super-forms/uploads/php/files/ub6r3m62hg7uqfjf30jjvc85ca/86983486198.pdfIn PDF document text
    • http://doktor-okonski.pl/uploadimg/file/26722980891.pdfIn PDF document text
    • http://erfolgsapp.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ec4dbc55514---wezonuro.pdfIn PDF document text
    • http://szyldkj.com/luodan/images/userfiles/file/52071598103.pdfIn PDF document text
    • http://3qlohas.com/CKEdit/upload/files/71969038190.pdfIn PDF document text
    • http://jkohut.pl/file/8492077078.pdfIn PDF document text
    • http://turnyras.lt/Files/file/28976337847.pdfIn PDF document text
    • http://www.horakgolf.cz/ckfinder/userfiles/files/91095076775.pdfIn PDF document text
    • https://www.bussmann-tiefbau.de/ckfinder/userfiles/files/57732065425.pdfIn PDF document text
    • https://tort-art.ru/userfiles/file/fojirujalode.pdfIn PDF document text
    • http://sinara.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/16072db7aadfa1---51786582326.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e17c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE17C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f98e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF98E 18160 bytes
SHA-256: 77df38036f03c83a1d07ac69640ca878890470c35f60b7921827501f716affcf
font_02_sfnt_off0001287d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1287D 10924 bytes
SHA-256: e030c434762eae2a02bca4f1eb6d305a9ac7bf80cde1848f2609f01776cd1680

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