Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6ff6ebd111e1f03…

MALICIOUS

PDF

85.0 KB Created: 2021-06-28 08:57:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 8e1aaa54f6596592e1299d126747b42f SHA-1: d0d02319d333b989e9f71f3022d5ae496f7addb0 SHA-256: c6ff6ebd111e1f031271e157947d8d5748b54e193d373f8aca9b5753c9909b1c
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. It functions as a link farm, containing numerous links to compromised WordPress upload directories and other disposable hosting. These links likely lead to phishing pages or further malware downloads, indicating a malicious intent to lure users to untrusted sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://redwoodpwr.com/wp-content/plugins/super-forms/uploads/php/files/pr6tblc3j8ibm2b0uocif96dr1/dulidazus.pdf
    • https://www.popcaffe.it/wp-content/plugins/super-forms/uploads/php/files/6b5c2466c18770d45cd63228d0f602aa/judofefaxedugibimiga.pdf
    • https://govox.co.uk/wp-content/plugins/super-forms/uploads/php/files/38knfvj4ui0jmb0gen481a08er/62289016096.pdf
    • http://plenar.hr/wp-content/plugins/formcraft/file-upload/server/content/files/16073fdd11ed7b---ladubiraxomarufire.pdf
    • https://www.simcoerecovery.net/wp-content/plugins/super-forms/uploads/php/files/hlr6ebbq1lcuaca21l24nm3lu1/bujowokobuvomobovol.pdf
    • http://serendipityorlando.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093ca8616726---sedufetarijinotisema.pdf
    • http://sxcec.org/userfiles/file/getevesenewufitemodo.pdf
    • https://sieuthimaytinhcu.vn/upload/files/fozogezogivutevutamew.pdf
    • http://bergfin.se/wp-content/plugins/formcraft/file-upload/server/content/files/160c90e30d1b7d---nesujobekiluf.pdf
    • https://mangonebike.com/uploads/file/tizazefowomexaxeri.pdf
    • https://www.lokalesichtbarkeit.de/wp-content/plugins/super-forms/uploads/php/files/ct90rt2omik6i3fstosriklqs6/difafon.pdf
    • https://cremeconferences.com/wp-content/plugins/super-forms/uploads/php/files/2cd3418c6c2d59baee85c51575f1402f/todezutuj.pdf
    • http://fortlauderdalelimorental.net/wp-content/plugins/formcraft/file-upload/server/content/files/160d8ef482a725---tevatusixutof.pdf
    • https://ontime-taxi.kg/wp-content/plugins/super-forms/uploads/php/files/c6216716c9e3a86e4d54f53876f3294d/96106075586.pdf
    • https://propbrains.com/wp-content/plugins/super-forms/uploads/php/files/qpu0n1b1hma3f0t16m7aes9eu4/nomazefekeka.pdf
    • https://mls.lighting/wp-content/plugins/super-forms/uploads/php/files/7d5a0e3470b9a2233790010242f6add6/92786691465.pdf
    • https://www.sacproblemleri.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081549078364---wesivuxegupodotazenov.pdf
    • http://gocreate.termall.pl/upload/fck/file/36069533942.pdf
    • https://cupanghitam.com/contents//files/jurafekonawelolobuxegi.pdf
    • https://deconkhoemanh.com/wp-content/plugins/super-forms/uploads/php/files/85l5t165oshj5ughpjj09b8n6d/24891166732.pdf
    • http://delawaretravelmedicine.com/wp-content/plugins/formcraft/file-upload/server/content/files/160867a003c14f---23172928914.pdf
    • https://auf.vn/wp-content/plugins/super-forms/uploads/php/files/vtfkr515giomnao8uhkv7l8va5/kilewojepotavavumulojokof.pdf
    • http://talleresjpg.es/img/file/nunikazuxulekipu.pdf
    • http://interiorconsignments.com/media/file/42426735732.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=short+definition+of+hypotonic+solution
    • 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_off0000e670.bin
540e1346b5b4ff1a328ecd2d3c56026e2c211546bcd79f3c56b8f8d9fd706994		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE670 18016 bytes
font_01_sfnt_off0001156c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1156C 16792 bytes
font_02_sfnt_off00012d83.bin
bb5c46f248713aae8a7067ff7516522bbefb4895e255b89fff3e9e5661025443		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12D83 10844 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.