Malicious PDF — malware analysis report

Static analysis result for SHA-256 8fbe217958b2316e…

MALICIOUS

PDF

86.0 KB Created: 2021-07-06 13:20:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 74230af5a385a2e582336d8f27b9da88 SHA-1: ec3eb853cc2351ef0e41b88d252701933c4d0fc4 SHA-256: 8fbe217958b2316e51754775bec825ddd582491c798f72cd15256ed7ede71335
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier indicating a high probability of maliciousness. The file contains a link farm pointing to compromised CMS upload storage and disposable hosting, suggesting an attempt to distribute malicious content or phish users. No scripts were extracted, but the presence of numerous external links indicates a primary function of redirecting users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/9d080d1b475b7c5cf58f419078c14c6e/15222127060.pdf
    • http://archi1919.com/smlclub-files/file/82313828443.pdf
    • http://metzpaintings.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a71357d099---gaxiwudu.pdf
    • https://mimpishiodua.com/contents//files/raroliropedepiwapowif.pdf
    • https://sirikulsteel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608092bb4640c---xitikajob.pdf
    • https://beaumont-residence.com/wp-content/plugins/super-forms/uploads/php/files/84rfq0us4barlne26ppasg3637/57721581847.pdf
    • http://asustainable.com/global/file/74008513561.pdf
    • http://geology.ie/wp-content/plugins/formcraft/file-upload/server/content/files/1609449af525d1---refororezum.pdf
    • https://www.electriclighting.com/wp-content/plugins/super-forms/uploads/php/files/6ae74f37dda663dc8d6f18503c7c390c/fadajotekem.pdf
    • http://kennyre.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b14a31100bc---gesugixagufujuzuxasi.pdf
    • http://amako-ra.com/wp-content/plugins/super-forms/uploads/php/files/078eec25d9088aeef1553403cf079c15/63686052643.pdf
    • http://www.esthemed.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160c0b9d1ca505---jigiri.pdf
    • https://www.cedicar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bbd795ddb54---nazirovegir.pdf
    • http://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1607cdf2426e39---jaselu.pdf
    • http://forresterfamilyreunion.com/clients/c/cc/cc72bfd2512333311cc1ef5a4fdef90f/File/3098213435.pdf
    • https://photographerin.agency/wp-content/plugins/super-forms/uploads/php/files/ssra49ihmq0mgc5smvmhoks9m2/24720148846.pdf
    • https://luxmarketing.agency/wp-content/plugins/super-forms/uploads/php/files/d9ivku0suhm910h7ecdo6hm4et/51580665879.pdf
    • http://kino-cosmic.ru/sadm_files/25912118030.pdf
    • http://www.peopleoftheheath.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f6d8d97447---roded.pdf
    • https://fsreloading.com/userfiles/files/tirukuzafadulewaxuvela.pdf
    • http://x-site.by/upload/editor/files/77112553848.pdf
    • https://xn--80aaaglcftt5alesfkk7f.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/5114e0927933d6dc04d4868584b808df/vajerawiki.pdf
    • https://healthmatters.me/userfiles/file/wedugifene.pdf
    • https://interesttour.com/wp-content/plugins/super-forms/uploads/php/files/ec3a179c1e6ae6135af7ab235c949816/rigewukesaxap.pdf
    • https://extremetour74.ru/wp-content/plugins/super-forms/uploads/php/files/e9f650231f0fbc091d5897bed831abc6/xekegu.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=sniffing+in+cyber+security
    • 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_off0000ecc8.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xECC8 16792 bytes
font_01_sfnt_off000104df.bin
ea1299c6772c00cc040969039f66c60392f02cb47e819caa4e00ed738a3e966b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x104DF 10612 bytes
font_02_sfnt_off00011d4b.bin
5462acf2267940f7fb2beaf9b1f3b766d0133c10ddc39a9fc3d0706977900337		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11D4B 17488 bytes

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