Malicious PDF — malware analysis report

Static analysis result for SHA-256 01f9d27b48581241…

MALICIOUS

PDF

78.9 KB Created: 2021-09-04 01:31:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b54f2f36de33a9633e06889ae1173cae SHA-1: da8c5bec05b77420169e53a91f7c9acfe0abbd6d SHA-256: 01f9d27b485812412ae771537f231630afb769a036f596b35b148d3dd94b38c0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, containing numerous URLs pointing to compromised CMS uploads and disposable hosting, likely intended to redirect users to malicious content. While no scripts were explicitly extracted, the PDF structure and heuristic firings suggest an attempt to lure users through deceptive links, aligning with spearphishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://vdgairconditioning.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160856af03d0ab---80427519799.pdf
    • https://ecowaytechnologies.com/ckfinder/userfiles/files/penerufuxobuduralo.pdf
    • http://shopcloud.cloud//ckfinder/userfiles/files/gorotojitos.pdf
    • http://sooam.com/files/fckeditor/file/16924578006126d585941e4.pdf
    • http://agendatourvietnam.com/hinhanh/file/12846627786.pdf
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/9ddc16c8de433d5a0fe06afb7c563388/66703456903.pdf
    • http://ever0036.com/assets/uploads/ckedit/files/20210726195029.pdf
    • http://bitite.lv/media/txt/122/file/dalamufadijobeka.pdf
    • https://tasleemdubai.com/userfiles/files/6715221203.pdf
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/160786a2a6876e---didenonusalujufugid.pdf
    • https://www.digitalsofts.com/wp-content/plugins/formcraft/file-upload/server/content/files/160921643e1267---27373335379.pdf
    • https://tirthmobile.com/wp-content/plugins/super-forms/uploads/php/files/9jchkdfelne52ncgdl28d9a3eh/49531625656.pdf
    • http://www.viksexteriors.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d233f2bed7a---21627328166.pdf
    • http://elenasteele.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bdb2b6d318b---vawebativodiwus.pdf
    • http://konberdbio.com/upload/files/pusemi.pdf
    • https://baxsporthorses.com/userfiles/file/jakukinujunufovuzu.pdf
    • http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/ds7clk69m6riokufem11qsvgr5/denoxetebizojafuvem.pdf
    • http://nemeckystrakac.sk/editor_uploads/files/34610581064.pdf
    • http://ithaca1966.com/clients/8/85/85e9e0a76fddb83d7689cebc6ab07fae/File/rupovafixorug.pdf
    • http://coreaad.com/DreamDataUpload/file/vabesomorus.pdf
    • https://axlthailand.com/imagexx/files/13521569418.pdf
    • http://www.reroofingbrisbaneqld.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16070c7555b3a3---93128342810.pdf
    • http://hillhouseclassof1961.com/clients/c/c9/c9b049383fb65e98d0a4dcab6c176392/File/noguganomufadezep.pdf
    • http://capitaloffice.pl/fotki/file/4131730706.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=jaguar+xj40+owners+manual+pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cf25.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xCF25 16792 bytes
font_01_sfnt_off0000e737.bin
1706ea5dca16c0264c6026ce23a3001187e17b0e7766ad323c6d2d42ea0100fe
pdf-font-stream PDF embedded font (sfnt) at offset 0xE737 16480 bytes
font_02_sfnt_off00011194.bin
fa203a00fe2ecbfc54517fb855c4b9a600c5b60cd43295b0083209b50f54dcc3
pdf-font-stream PDF embedded font (sfnt) at offset 0x11194 11260 bytes