Malicious PDF — malware analysis report

Static analysis result for SHA-256 94862e1f00e94590…

MALICIOUS

PDF

104.7 KB Created: 2021-06-27 01:06:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: acf1bc2010b729db31aa44b2316eb02d SHA-1: fe7b5c707b77e9bc6efcdc375fda6e64078f1e11 SHA-256: 94862e1f00e94590fc1b30c38f9f7ba3ce459d271548ca41e08fa6dcd0de46b9
156 Risk Score

Malware Insights

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

This PDF was identified as malicious by ML classifiers and ClamAV, indicating it likely exploits a vulnerability or serves as a phishing lure. The document functions as a link farm, with numerous URLs pointing to other PDFs hosted on compromised WordPress sites, suggesting a multi-stage attack. The primary goal appears to be directing users to malicious content through a chain of compromised links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9806

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://smartcookieacademy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607dc6086925d---sipupejidemikalewudiriler.pdf In PDF document text
    • http://raczcsalad.hu/files/92921752907.pdfIn PDF document text
    • https://www.lipfish.no/wp-content/plugins/formcraft/file-upload/server/content/files/1606f59c716752---fosibiwakezi.pdfIn PDF document text
    • https://lerong.vn/wp-content/plugins/super-forms/uploads/php/files/5808f1d75e58cbd3e1eb6ba45d659202/wifuxas.pdfIn PDF document text
    • https://www.engltg.com/wp-content/plugins/super-forms/uploads/php/files/907af40d2f3b3c7b36eeedd8d7d2357f/70200722832.pdfIn PDF document text
    • http://barcelonasixtytwo.com/userfiles/file/17718267286.pdfIn PDF document text
    • https://calmoinc.com/upload/editor/file/90586372369.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a642a2063f7---josodepobujinalasuxepin.pdfIn PDF document text
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/2tpdjpep18dc2fvtq1hvh8mtt1/jekexiwesemavatali.pdfIn PDF document text
    • https://www.allterra.group/wp-content/plugins/super-forms/uploads/php/files/a3d59b3249488c4f7aaeb58af9d4de83/javilesekujixup.pdfIn PDF document text
    • http://unipell.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c29f11ba93f---86602408561.pdfIn PDF document text
    • https://simovi.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160b5c75a79274---lomatogoxidaxunixaro.pdfIn PDF document text
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/fc1d55795f6f3fd3be4e7d9737ec5f43/55500192772.pdfIn PDF document text
    • http://lalitas-thaimassage-spa.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608fb1fb0eeb1---zosudojimemolegilunikeri.pdfIn PDF document text
    • http://jeugdopdewetenschapsagenda.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160bda06beb090---84008338091.pdfIn PDF document text
    • http://www.blackhillsdancecentre.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083674175ac2---86633809707.pdfIn PDF document text
    • http://pulsrmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e4203a94be---jesubiduwifajeteg.pdfIn PDF document text
    • http://adams-gold.ru/archive/image/file/42329668474.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/feseni.pdfIn PDF document text
    • https://ipic.vn/userfiles/file/girotituwafo.pdfIn PDF document text
    • http://www.nisbd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c1f5f569be---75478330926.pdfIn PDF document text
    • https://primax.fr/wp-content/plugins/super-forms/uploads/php/files/7q7r3melvtnideprmlmht4fl71/55617810896.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=pokemon+mystery+9+gba+downloadPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000106f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106F9 11100 bytes
SHA-256: 1b20c4c5d72e4e643afa68d551929ffd39146ac09ef16251bd29c61b2b462b56
font_01_sfnt_off000120cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120CF 16092 bytes
SHA-256: 9d5144547e0b729630886a3ad3ce48e7da84b0115899dd9c2390406af6f0fecd
font_02_sfnt_off00013614.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13614 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00014e21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14E21 2652 bytes
SHA-256: 82d66b757b11b671fd1a501783c736873e87c9d059025cfc772e35b15bc95bdd
font_04_sfnt_off0001596c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1596C 23380 bytes
SHA-256: e6c677ca22ca6d911cf56e3b3dae0249faec28e96f359bd1014fba230611cb86

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