Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e2fe12cc0032d6c…

MALICIOUS

PDF

86.1 KB Created: 2021-09-03 22:03:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 65ba63de6a984886c67fef6e660a76d4 SHA-1: eeba59e4fbd3bac8eb6d2c0eb49aeaaebc1c25e8 SHA-256: 8e2fe12cc0032d6c484c282f5d9b4632a14594dc5db9b195510ce885bc1c718a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier, indicating malicious intent. It contains a large number of embedded URLs, many of which are part of link farms hosted on disposable or compromised domains, suggesting a phishing or scam operation. The heuristic PDF_SEO_DISPOSABLE_LINK_FARM specifically points to this behavior.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://pixomot.ru/uplcv?utm_term=concussion+brain+rest+pdf PDF link annotation
    • https://accuratesearch.com/userfiles/file/kanominewunasugiludi.pdfIn PDF document text
    • http://alphasigmaoverseas.com/userfiles/file/majisosofixuruw.pdfIn PDF document text
    • https://gastriklandsbf.se/UserFiles/files/71176756213.pdfIn PDF document text
    • http://bagliodeimille.it/userfiles/files/23038017571.pdfIn PDF document text
    • https://biocoils.com/img/file/84098742160.pdfIn PDF document text
    • https://fratellifurloni.it/file/18682048462.pdfIn PDF document text
    • https://stellabakingcompany.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e4af788988---xizujizenebobadejovalose.pdfIn PDF document text
    • http://timnhanhonline.net/upload/files/37721654778.pdfIn PDF document text
    • https://www.studioline.ie/ckfinder/userfiles/files/sefonetamop.pdfIn PDF document text
    • https://asiatravel.kg/wp-content/plugins/super-forms/uploads/php/files/8c084d43d09a66ab28d34c059f219910/kalubolulamomenobew.pdfIn PDF document text
    • http://tourister.kr/userfiles/file/jenoxaretikofipupob.pdfIn PDF document text
    • http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611c36c4afff4---6901996717.pdfIn PDF document text
    • https://ehblending.com/wp-content/plugins/super-forms/uploads/php/files/cb40e844b522c341c81ea03f329751f0/21554188441.pdfIn PDF document text
    • http://sinara.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160795368c2975---22106544671.pdfIn PDF document text
    • https://hirurgija.me//files/22047403669.pdfIn PDF document text
    • https://almondzwealth.com/administrator/imagetemp/file/togepeferijazezuduwipoxeb.pdfIn PDF document text
    • http://uptownherndon.com/uploads/files/zazatakawonap.pdfIn PDF document text
    • http://thaide.org/userfiles/file/35632918673.pdfIn PDF document text
    • http://eds-muhendislik.net/ckfinder/userfiles/files/jajebiletajisobedesujoj.pdfIn PDF document text
    • http://tornado69.com/clients/40643/File/42566119654.pdfIn PDF document text
    • http://spy-military-labs.com/userfiles/file/71967729155.pdfIn PDF document text
    • https://engravestone.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082c7d2577c4---92423159610.pdfIn PDF document text
    • https://a2designbg.com/userfiles/file/fatirudak.pdfIn PDF document text
    • http://c2r-auto.com/uploadfiles/file/2021071303202773499.pdfIn PDF document text
    • https://megashina24.ru/files/files/13719259382.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_off0000ebd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBD9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000103f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103F0 10836 bytes
SHA-256: 58b7a35cfb08d6c4f7c8ff95bba7700b6c033e695bd923f697fbf4004b7a2200
font_02_sfnt_off00011ce7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CE7 17528 bytes
SHA-256: e4852f8a852f098652712d9161c487f898e5059c2ebda43c8da643576edf58a1

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