Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a7ffa5d379b9987…

MALICIOUS

PDF

84.0 KB Created: 2021-08-16 14:02:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 378a4b19bbdf6a8e906e2587dbd4a5ab SHA-1: 16e8caabc89e48d446c92e58ad07f5fadef7995b SHA-256: 6a7ffa5d379b99870e90fcaea8908ab0696b3e4c7c22212ec4804d341c2ea019
156 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to multiple domains, many of which are hosted on compromised CMS uploads or disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. No scripts were extracted, but the structure and embedded URLs are indicative of a malicious document designed to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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 http://costruzionibulagna.it/userfiles/files/841754011.pdf In PDF document text
    • https://allegypttours.net/userfiles/files/60955508764.pdfIn PDF document text
    • http://remont-etalon.ru/upload/files/pipoxupoxup.pdfIn PDF document text
    • http://schouteninterieurwerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608e6db1a5e5a---32141207813.pdfIn PDF document text
    • http://constantemail.com/userfiles/file/16290839481272034197.pdfIn PDF document text
    • https://www.arc-welding.co.uk/wp-content/plugins/super-forms/uploads/php/files/t63vpqkinf9djtfg12tst9shp6/25884531219.pdfIn PDF document text
    • http://asiavent.com/UserFiles/file///80952554736.pdfIn PDF document text
    • http://www.garriagricola.com/wp-content/plugins/formcraft/file-upload/server/content/files/160898eb2b07a6---gilexefipex.pdfIn PDF document text
    • https://growyourmoney.in/userfiles/files/kasupewagagun.pdfIn PDF document text
    • https://underworldgear.com/upload/users/files/tatoxorozaxapomipu.pdfIn PDF document text
    • http://studiospazioambiente.it/userfiles/files/resev.pdfIn PDF document text
    • http://galettedesrois.hu/userfiles/file/gulupizutuxe.pdfIn PDF document text
    • https://wentworthre.com/wp-content/plugins/super-forms/uploads/php/files/59e7cbf893a948fdbe247407d7b28c6b/81936492448.pdfIn PDF document text
    • http://quickfix-poland.com/wp-content/plugins/formcraft/file-upload/server/content/files/160850cbb5841f---sibujomixawexenibidila.pdfIn PDF document text
    • http://ourconn.com/userfiles/file/202107250426017804.pdfIn PDF document text
    • http://sarljarry.fr/userfiles/file/divavodifepoj.pdfIn PDF document text
    • http://www.sosonomo.com/ckfinder/userfiles/files/53030429896.pdfIn PDF document text
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/0e48c752b1b3369f9e28c616f67087f4/50911512788.pdfIn PDF document text
    • https://creativesilhouettes.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607ce0ec4b583---32683454500.pdfIn PDF document text
    • https://markmont.eu/editor_uploads/system/files/86720084304.pdfIn PDF document text
    • https://mithermomix.com.mx/wp-content/plugins/super-forms/uploads/php/files/d11cee563526ff643ab2476375df452e/taxunasidonajesu.pdfIn PDF document text
    • http://etasystem.net/userfiles/files/37452464162.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=leadership+theory+and+practice+by+peter+g.+northouse+8th+edition+pdfPDF 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_off0000e29b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE29B 17076 bytes
SHA-256: d9ba0d029d1581ddbb2d103f9c2000b6dfa471413901732950e3b30ec227d29f
font_01_sfnt_off00010edd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EDD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000126f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126F4 11440 bytes
SHA-256: 6faa8175fd5af9707a68dc119dcdfeca113753233c42f02c0186881cdb67533a

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