Malicious PDF — malware analysis report

Static analysis result for SHA-256 94342cd67bfec53a…

MALICIOUS

PDF

90.5 KB Created: 2021-07-07 23:19:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 353840642d5548062cae059df69ec4c3 SHA-1: d56c52d4ab8d9aa969376ed5dd4e7e2fff22c6ab SHA-256: 94342cd67bfec53a43a17777ec84965a0752fef66284ffc3fdce805d26a19e46
164 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress upload directories, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9924

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://elitestrategyglobal.com/wp-content/plugins/super-forms/uploads/php/files/66a4dde2263ba228973d10f78654d412/sirelebigi.pdf
    • http://www.next-conseil.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16097b4ece4844---29655606914.pdf
    • https://earplighting.com/wp-content/plugins/super-forms/uploads/php/files/6c2ec0ccbc7f628291b56c1ac234e1dd/risijifumometaruzakuzugu.pdf
    • http://purofirstli.net/userfiles/file/1701834938.pdf
    • https://hondamienbac.vn/userfiles/file/85842625518.pdf
    • http://nesthomes.in/userfiles/file/zogavekowibawadujizizuxul.pdf
    • https://rescue.bg/wp-content/plugins/formcraft/file-upload/server/content/files/1607c83bccd7c2---92423962651.pdf
    • https://termoformat.md/img/files/22725129642.pdf
    • https://www.caesarstravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097717e1e398---36117806542.pdf
    • https://parquesanalbertohurtado.cl/ckfinder/userfiles/files/pajijujoboralinojag.pdf
    • https://oknoplus-omsk.ru/wp-content/plugins/super-forms/uploads/php/files/dd4d57073dbc22aacf24daf9b9ba0126/xukijometavipibefito.pdf
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/f153994cc17e4658ba24580ac3089e8e/vepik.pdf
    • http://www.cuadernos.in/wp-content/plugins/formcraft/file-upload/server/content/files/16080221f2464e---10918298194.pdf
    • https://roofmed.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160740efa154c4---61864002402.pdf
    • http://amfmeg.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608be18e259f1---xemopojoxabomevujumezesa.pdf
    • https://www.treehousecare.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607c662ec86ae---xuwinatuforewemomujatugo.pdf
    • http://divodizain.ru/ckfinder/userfiles/files/jemelelasix.pdf
    • https://www.msolartop.cz/wp-content/plugins/formcraft/file-upload/server/content/files/16085c372cadf0---85130809200.pdf
    • http://themultifold.com/wp-content/plugins/super-forms/uploads/php/files/9m7rcekmis9g5mqm4435jhria7/voxiwirarolelabenokosiwo.pdf
    • http://rainbowcaterers.in/userfiles/file/49761875084.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5c25c2610b---46390272239.pdf
    • http://alsumiri.net/wp-content/plugins/super-forms/uploads/php/files/3eee93162508a4c598c3bdba3d82e187/63062855511.pdf
    • http://makaifruits.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095d80e591ca---5661504078.pdf
    • https://www.alphaveneers.com/wp-content/plugins/super-forms/uploads/php/files/30d6ac09fb736ad1eed244d856971f4e/18925369457.pdf
    • https://cpsguffanti.com/uploads/file/37737271438.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=among+us+hack+clothes+and+pet
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f57c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF57C 16792 bytes
font_01_sfnt_off00010d8e.bin
d28c470db4b44fbf63f35f9642bffef303604508131b199664bec20a842477c3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10D8E 17348 bytes
font_02_sfnt_off00013b44.bin
72bda604c77ca771a1a14ee35dc8ff354b9f00ec81e947fe844e91f3a29209ee		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13B44 1684 bytes
font_03_sfnt_off0001434c.bin
9a7d5616f4c97d959e188f345c11a065230409afb5d4eb9d3ff9ae53057deeb3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1434C 10944 bytes

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