Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ea6a4c49ebb0ecd…

MALICIOUS

PDF

124.4 KB Created: 2021-06-27 14:50:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 5f0ab1fdc72d162c64216ccc8c644315 SHA-1: 831af919a29a2d0ab5259251bfbc2d1fd6c46364 SHA-256: 1ea6a4c49ebb0ecd77acb4fee69fd6a7ce012b51b91f2fe563409a55a9dc816f
156 Risk Score

Malware Insights

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

The PDF contains a large number of links pointing to compromised WordPress sites, indicating a link farm designed to host malicious content or phishing lures. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution via these compromised domains. No scripts were extracted, and the document body was unreadable binary data.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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://www.fullertherapy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609bb4c5f15fe---93533908120.pdf
    • https://www.hungarianassociation.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080f5d8157f0---noroxotexulasuxajel.pdf
    • http://www.tobywells.org/media/fckdir/file/21440886801.pdf
    • http://akkoryazilim.com/userfiles/file/mivepa.pdf
    • http://mirutte.com/newsfiles/files/18985607708.pdf
    • https://www.toptalentusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d9d8956352---xupotivobujolinemafawojab.pdf
    • https://funkydrop.shop/wp-content/plugins/super-forms/uploads/php/files/03b9f58409bfa115cb93bbaa72b5015f/29285468371.pdf
    • http://pospatrans.cz/UserFiles/File/56127190431.pdf
    • https://uleiuri.ro/userfiles/file/28878119530.pdf
    • https://theshairpodcast.com/wp-content/plugins/super-forms/uploads/php/files/8a63cfb4dd46f500d83ed43c4fc29f03/xuxomade.pdf
    • https://www.accidentinjurylascruces.com/wp-content/plugins/super-forms/uploads/php/files/5shqs0e6q01sahij6p0hir6fhi/zunevomapotegoxizapo.pdf
    • http://anthonyvienna.com/sites/default/files/file/gomexomon.pdf
    • http://audiomaster.se/wp-content/plugins/formcraft/file-upload/server/content/files/160ab53ffa08ea---42613770819.pdf
    • https://ambientltg.com/wp-content/plugins/super-forms/uploads/php/files/9aefd3cc97cb5bfe0d5a097a3f7b38f9/tedozofuruf.pdf
    • http://apcmagon.com/userfiles/bamukaku.pdf
    • https://www.toptalentusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d71e4b015f---32382524927.pdf
    • http://lalitas-thaimassage-spa.de/wp-content/plugins/formcraft/file-upload/server/content/files/160bf8e2cae86a---15409120117.pdf
    • https://webmodels.studio/wp-content/plugins/formcraft/file-upload/server/content/files/1606ccac105be9---99318656449.pdf
    • https://smoothnomad.com/wp-content/plugins/super-forms/uploads/php/files/vo5bpdsf0teticc5b125kfl0qn/padawevolusadu.pdf
    • http://discoveryenglish.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609404cf8fd5f---gopox.pdf
    • https://www.ediliziaindustriale.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072abd101536---gupedegikuwopimunisow.pdf
    • https://hotelristorantenovecento.it/wp-content/plugins/super-forms/uploads/php/files/017ef1faae9cad1982e0f30744f43107/43793718176.pdf
    • http://inlygiaylynhua.com/upload/files/joredotivipemipisoga.pdf
    • https://oiweld.com/wp-content/plugins/super-forms/uploads/php/files/d02ebd78f2bf256c91921172f265f60c/pimetidagigeruvugarijekof.pdf
    • https://autotrilogy.com/wp-content/plugins/super-forms/uploads/php/files/d991436a9ad2d8b709f21108e16cedd4/24456972890.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=trotsky+white+negroes
    • 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_off00018369.bin
54068f63095cd4fcba4daf37d949302a1270a66d36e9958328e2cfe8d2bf8655		 pdf-font-stream PDF embedded font (sfnt) at offset 0x18369 18180 bytes
font_01_sfnt_off0001b260.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1B260 16792 bytes
font_02_sfnt_off0001ca77.bin
35e2b3c9968468820f370a4ec51e5f171e4045e1c75d0bdb33ec088c9d3703ff		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1CA77 10432 bytes

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