Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7abcbc670e1bace…

MALICIOUS

PDF

126.6 KB Created: 2021-09-17 15:07:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 3547b4b753a2ff44edf85ae73847f8aa SHA-1: a1512006c114a53b42473e58eeae868f94eaa4a9 SHA-256: c7abcbc670e1bace7e18b3c515f103035b30fa198169c9d7f6aa4cf680958459
156 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious. It functions as a link farm, containing numerous URLs pointing to potentially compromised WordPress sites and disposable hosting. These links likely lead to phishing pages or serve as download locations for further malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9927

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://oglethorpeclub.org/~oglethor/UserFiles/file/80922244788.pdf In PDF document text
    • https://glosunspa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ddb969e16b---vezikida.pdfIn PDF document text
    • http://www.mediacomriccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/16141aee8633dc---xetodojipofedi.pdfIn PDF document text
    • https://tocgia247.com/wp-content/plugins/super-forms/uploads/php/files/n2cfnq4nvpden31i43ekqh6c4t/53946369837.pdfIn PDF document text
    • https://seikai.jp/free_images/files/pewizakuzojefexawofemuwo.pdfIn PDF document text
    • https://autopsrus.com/ckfinder/userfiles/files/83113701927.pdfIn PDF document text
    • https://codecs.ro/images/file/sujokelukifujuvotijeta.pdfIn PDF document text
    • http://4reality.cz/userfiles/files/muvugaxak.pdfIn PDF document text
    • https://congtydaihai.com/upload/files/26975453468.pdfIn PDF document text
    • http://bancasemecanino.com/userfiles/files/velapira.pdfIn PDF document text
    • https://stayinbranson.com/ckfinder/triplebuserfiles/file/11777874681.pdfIn PDF document text
    • http://www.deadclan.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1613099ec39ca7---vikowodetoxiwitivowakagub.pdfIn PDF document text
    • https://buyafranchise.org/files/files/55097068625.pdfIn PDF document text
    • https://t2sc.me/userfiles/gigoxowibametozavup.pdfIn PDF document text
    • https://www.drmarlenebothma.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1613688466963e---damapogezakonukez.pdfIn PDF document text
    • http://tao-ssct.org/data/upload/file/rimegepi.pdfIn PDF document text
    • http://www.mediacomriccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/1614126bba217c---99474369661.pdfIn PDF document text
    • http://litho-and-co.fr/ckeditor/upload/files/zufegunefupu.pdfIn PDF document text
    • http://pspectr.ru/userfiles/file/66496288563.pdfIn PDF document text
    • http://weingut-suppan.at/files/legazolewumat.pdfIn PDF document text
    • https://ghnservizi.com/file/14812806398.pdfIn PDF document text
    • https://www.elektrobetrieb-scholz.de/wp-content/plugins/formcraft/file-upload/server/content/files/16142dca4a06e6---futibosevegaso.pdfIn PDF document text
    • https://www.moxiclear.com.au/application/third_party/ckfinder/userfiles/files/96380501594.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=boris+pasternak+doctor+zhivago+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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000169be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x169BE 22840 bytes
SHA-256: f917356f49d919b1e7288a411ebf9caad04bfaef5b15dca06073b1b9227cef7c
font_01_sfnt_off0001a469.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A469 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001bc7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BC7A 16180 bytes
SHA-256: c0217721a1102ad1f8a8ff5461faadb02f26a3634bfe128d67f68b25b112ee8f
font_03_sfnt_off0001d224.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D224 11124 bytes
SHA-256: ab75f412d14159b9e71ec8c5bcf9e86f05717f9763836d64a06a2410e51fc83e

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