Malicious PDF — malware analysis report

Static analysis result for SHA-256 c568fc95e2c1e62e…

MALICIOUS

PDF

90.2 KB Created: 2021-08-25 09:25:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 0262b747a91634637ec054aab2178d7a SHA-1: f64b49a20c783f46ae317e1efe751cac0cc112bc SHA-256: c568fc95e2c1e62eb150509074ac3cc38f4ad92c03301a45b8ab87bc5d228f9e
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating it likely exploits a vulnerability to execute code. The document functions as a link farm, containing numerous URLs that point to various websites, some of which are hosted on compromised WordPress upload storage. The primary purpose appears to be directing users to potentially malicious content or phishing sites.

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 http://angelescare.com/userfiles/file/2919600666.pdf In PDF document text
    • http://duocmyphamcongty.com/app/webroot/uploads/files/19155014507.pdfIn PDF document text
    • https://cffcommunications.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/1607d604197bd1---wubenikovibanoxese.pdfIn PDF document text
    • http://sip7.online/wp-content/plugins/super-forms/uploads/php/files/391f2dc318c3a84b08787d42fc6efcdc/75839993234.pdfIn PDF document text
    • https://patriot.ch/wp-content/plugins/super-forms/uploads/php/files/o97rtq1mbae123lck7iiu8tmfd/bobazewivorovebima.pdfIn PDF document text
    • http://wahiclassof69.com/clients/874294/File/35300295127.pdfIn PDF document text
    • http://strategie-online.net/catalogue_dynamique/file/67269428185.pdfIn PDF document text
    • https://nailseasupportgroup.com/wp-content/plugins/super-forms/uploads/php/files/6004315736bcbbdda90325fb019214fa/weroxotawedibej.pdfIn PDF document text
    • http://bascobrunswick.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1610e6b5ce6dbb---69418133567.pdfIn PDF document text
    • http://c2mag.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089a83c8b742---robisabadodeb.pdfIn PDF document text
    • http://www.grupohk.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b8a92c84bd8---fanolekipamenit.pdfIn PDF document text
    • https://humanistbeauty.com/wp-content/plugins/super-forms/uploads/php/files/r2bpt8r2bklrc1l10elp4gtpgo/geminabomerererevaposi.pdfIn PDF document text
    • http://studiomontironi.eu/userfiles/files/gesagavose.pdfIn PDF document text
    • https://www.superioreagle.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2b263c1c12---xatofibasulupivudaf.pdfIn PDF document text
    • https://argekaucuk.com/nbg/upload/files/71984833764.pdfIn PDF document text
    • http://chekeeh.ir/basefile/chekeehir/files/puzulexejasosomoke.pdfIn PDF document text
    • https://wineart.online/userfiles/file/65179830870.pdfIn PDF document text
    • https://photographerin.agency/wp-content/plugins/super-forms/uploads/php/files/3arq3gelockp9naeekr9rvndl2/78865849633.pdfIn PDF document text
    • http://gingerwooddesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b71c0969d94---xakewulejajudojumorapav.pdfIn PDF document text
    • http://udokutscher.de/gfx/userfiles/files/77404953593.pdfIn PDF document text
    • http://www.pranabkumar.com/fckimages/file/42556284537.pdfIn PDF document text
    • http://tentimesneedlehill.com/UPFILE/userfiles/files/6126610689.pdfIn PDF document text
    • http://braintradingbcn.com/wp-content/plugins/super-forms/uploads/php/files/bb8504ea5ff79719490d15c9ff5796c6/50905091828.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=din+iso+2768+mk+meaningPDF 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_off0000fbd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBD7 10848 bytes
SHA-256: 2e3348387dcafa9316694e03298b5515fa1c3a6b347a998ac3d65d1d328e928f
font_01_sfnt_off000114f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114F0 17668 bytes
SHA-256: 88d6e31f45a277acc830b464266c206a24be785f8fa05c13141fe5d0840e18c3
font_02_sfnt_off00014314.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14314 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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