Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c042cde386313ff…

MALICIOUS

PDF

99.8 KB Created: 2021-06-26 15:51:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 6be31891bc3d9d89e88b7485c6e9699d SHA-1: f0c886ad73cd039df6e40283612affa6a87994c0 SHA-256: 2c042cde386313ff08033b23b56de5035b4909d05ffd02f675613a131494e272
156 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to numerous URLs, many of which are hosted on compromised WordPress sites. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. No scripts were extracted, but the structure suggests an attempt to lure users to external, potentially compromised, resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9922

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://ttlengenharia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160ab778504d6f---pugosogikarakamivele.pdf
    • https://www.ideaklinik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16073f06c65e38---73932623260.pdf
    • http://boathousebrokerage.com/userfiles/file/fegufejudaxenovapem.pdf
    • https://ckmusicdesign.nl/userfiles/file/puxikaxogomip.pdf
    • https://sieuthimayphat.com/ckfinder/userfiles/files/66412149462.pdf
    • https://retentionstudentexperience.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b664cd9508b---vonil.pdf
    • http://clair-environnement.eu/catalogue_dynamique/file/wusalog.pdf
    • http://lawcab.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160917d20bace1---mosude.pdf
    • http://rustproofingottawa.com/userfiles/file/tetejorejefataluleg.pdf
    • http://redwoodpwr.com/wp-content/plugins/super-forms/uploads/php/files/amm8b6vunl1nq0l7lcb0i6buj5/43033190187.pdf
    • http://jockmurray.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608dec2acd1d1---86065177695.pdf
    • http://johncarroll1967.com/clients/1/18/1896e795ecc2602204d707ec4e69586f/File/74432903279.pdf
    • https://malimbe.africa/wp-content/plugins/super-forms/uploads/php/files/1d4556373bb60af5a532051882aa51e5/98111341215.pdf
    • http://celiapopememorial.com/clients/4/45/45605e685ba8a3b32f56966823665796/File/14331115069.pdf
    • http://worldnaturalfood.com/image/upload/File/13821963045.pdf
    • http://recamonde.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16089501bceaaa---35212977240.pdf
    • http://www.adanakursmerkezi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4043912553---15466508840.pdf
    • http://www.caslyn.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160b33b7b946ff---wilazenijiwenefakitidusaf.pdf
    • https://fobiy.net/wp-content/plugins/super-forms/uploads/php/files/58064883d81446406c642a6f7df35beb/zemaselitosezixajir.pdf
    • https://avonsteel.com/UserFiles/file/13562617025.pdf
    • https://mavismanagement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c3c15de733c---73863863976.pdf
    • http://www.primalegal.eu/wp-content/plugins/super-forms/uploads/php/files/30uivm0o49kjl8712m6n5lrgf4/jidozegopubafovejapodoji.pdf
    • https://parklanehotel.asia/userfiles/file/getivimuzajom.pdf
    • http://chicagohalo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cc3aebe3b97---kemotujenirudelufokiziz.pdf
    • https://apoc.com.au/wp-content/plugins/super-forms/uploads/php/files/ee900e015bdea5210994c42b1b9ccc68/82905227072.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=how+to+draw+a+position+time+graph
    • 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_off00012200.bin
2ef713a4ef5fa96af5866c6a7b67b5604316d844dc94269de6155a99b42601a0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12200 10868 bytes
font_01_sfnt_off00013ab6.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13AB6 16792 bytes
font_02_sfnt_off000152c8.bin
fb0f2c9d7a8f98f13a999e3787e7df498d16208856707ad851859f7cb1f296a8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x152C8 17792 bytes

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