Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb15a667e59cdc6d…

MALICIOUS

PDF

94.5 KB Created: 2021-08-11 19:58:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 821deb46e393f50d4677727cb81f6bbe SHA-1: 64301e403b20730a14eb4875565d56c7ab765f8c SHA-256: eb15a667e59cdc6dcf17557ca0daeed2b75e1373f1638fb7c1aea59e601933c3
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple external websites, some hosted on compromised CMS uploads. The primary purpose appears to be redirecting users to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9876

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://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610c8e24e7b48---58741755266.pdf In PDF document text
    • http://unseenadventure.com/userfiles/file/rogasamimej.pdfIn PDF document text
    • https://talleresimad.com/images/subidas/files/migojetozezefam.pdfIn PDF document text
    • http://debschoen.com/userfiles/file/91830595735.pdfIn PDF document text
    • http://tnslib.net/userfiles/files/rupavazoner.pdfIn PDF document text
    • https://ceadersvalet.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b121f9d6b71---revitusumuve.pdfIn PDF document text
    • http://hndgyl.com/v15/Upload/file/2021628518133137.pdfIn PDF document text
    • http://www.airportlimofortlauderdale.net/wp-content/plugins/formcraft/file-upload/server/content/files/1610674ddbdf38---82931682238.pdfIn PDF document text
    • https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160ee50c8ce4da---44921833604.pdfIn PDF document text
    • https://presstone.hu/userfiles/file/35990129480.pdfIn PDF document text
    • http://bjoybrands.com/wp-content/plugins/formcraft/file-upload/server/content/files/160adadab01e62---92194098008.pdfIn PDF document text
    • http://prime-standard.com/piceditor/file/6667206783.pdfIn PDF document text
    • http://singlesync.com/userfiles/file/kevukokimoxusiguxoxevoz.pdfIn PDF document text
    • https://www.americansummercamps.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079cfff7390b---fokupefaralopebu.pdfIn PDF document text
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/87ngd24d9pkr37q6brqhjcjgv1/90700525499.pdfIn PDF document text
    • https://dmvassociates.com/wp-content/plugins/super-forms/uploads/php/files/c2db6049b72112cb72fd7377d75cf616/46264588938.pdfIn PDF document text
    • https://broodjedenbosch.nl/ckfinder/userfiles/files/bobirezunegegamonelalifug.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/16087e453892fe---rukesoxakulilex.pdfIn PDF document text
    • http://kondicionery-domodedovo.ru/upload_picture/file/zagamawusopim.pdfIn PDF document text
    • http://sporteambiente.it/ckfinder/userfiles/files/73140864013.pdfIn PDF document text
    • http://dmn.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16077de2365e08---libewumifelimebaziruvuben.pdfIn PDF document text
    • http://afghansolar.com/userfiles/file/nadirexutuf.pdfIn PDF document text
    • https://cvenhancer.com/wp-content/plugins/super-forms/uploads/php/files/9210a69e19d4334fbfdc2685c11dc836/logezigew.pdfIn PDF document text
    • https://www.rydalmereprestige.com.au/wp-content/plugins/super-forms/uploads/php/files/bn3lnupo4jivpfitmnerscnb0q/50050605744.pdfIn PDF document text
    • https://movesforfree.com/wp-content/plugins/super-forms/uploads/php/files/2obib63behmo7t395lk4vv3fu6/92565652751.pdfIn PDF document text
    • http://jhroseclassof77.com/clients/45984/File/dojefuwimasusenegirafub.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=what%27s+my+chinese+zodiac+2020PDF 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_off00010d4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D4D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001255f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1255F 16888 bytes
SHA-256: 53f05c9873c25ba1be8eafd1fd861df1a2a36b861cc1dd09b7e5cb2dbcf89505
font_02_sfnt_off00015198.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15198 10932 bytes
SHA-256: 0b9794f4a6ff33df7063c3e6ef44ded0e8e5e6df9a3708419ae956af01c03753

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