Malicious PDF — malware analysis report

Static analysis result for SHA-256 c98702043fe77286…

MALICIOUS

PDF

91.9 KB Created: 2021-07-05 22:53:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: a13e5237e30c006c0b59d0ef438390a7 SHA-1: 8b99649ea1d34896454c4e1f79b48bf9e2695152 SHA-256: c98702043fe77286dfc06064edcd46578eaba721fae9c3feac503cb0d3a2f5c0
156 Risk Score

Malware Insights

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

The PDF document contains numerous links, many of which point to compromised WordPress sites acting as hosting for further malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to lure users to malicious sites for exploitation or phishing. The presence of multiple compromised CMS upload links suggests a coordinated effort to distribute malicious files.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9822

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 https://www.northernillumination.com/wp-content/plugins/super-forms/uploads/php/files/7c5de23422a43d337138982d234f23fd/21190514948.pdf
    • http://www.recetasyconsejos.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d648c51917---zivakoketi.pdf
    • https://laxmigrouppune.com/wp-content/plugins/super-forms/uploads/php/files/4f0d302ccdbb0567b68ae413614396c5/fibilomudesotukir.pdf
    • http://www.kzhep.in.ua/wp-content/plugins/super-forms/uploads/php/files/rgsto51qjkl6arg57eaoueq4d4/66718673064.pdf
    • http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086abd4672ac---49539822709.pdf
    • http://istrouma1971.com/clients/9/9b/9b88b062b8d6af44b28e209fcb06d7d5/File/73676310248.pdf
    • http://absolutelyneon.com/userfiles/file/49661052826.pdf
    • https://www.blackandwhite-salon.com/wp-content/plugins/super-forms/uploads/php/files/10004b8fb5ff2fe9b59b220c356529f9/1221812843.pdf
    • https://sieuthimaytinhcu.vn/upload/files/pejitul.pdf
    • http://www.nanodrywash.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac3305ad428---sipamewosafiz.pdf
    • https://allcreaturesinc.com/files/files/kidume.pdf
    • http://www.mtpartnersfl.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079e9c16af17---83721131601.pdf
    • https://www.ideakliniksisli.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cbf45208ca---netetanovezoranakaloga.pdf
    • http://www.vitrierbxl.be/wp-content/plugins/formcraft/file-upload/server/content/files/160aa156476d17---serujonuj.pdf
    • https://prosegik.com/wp-content/plugins/super-forms/uploads/php/files/31bc9fa40397bd646d49bd98c936aa64/38453434701.pdf
    • http://elonsummerstorage.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad5cba18d23---ropepojunivokusape.pdf
    • http://adabaskimerkezi.com/upload/file/kesaviburazo.pdf
    • https://glbtrader.com/userfiles/file/zatadulexoj.pdf
    • http://asu.com.vn/wp-content/plugins/super-forms/uploads/php/files/g6i8j7bnu70oi4g3rs3lrii2ir/sodaxozitunodesakafol.pdf
    • http://eske.hu/wp-content/plugins/formcraft/file-upload/server/content/files/1606d868d778cf---tonuwikelavopo.pdf
    • http://kardelendalgicpompa.com/uploadfiles/file/fatuti.pdf
    • http://vidol.nl/userfiles/file/tupemiwijaribebuva.pdf
    • https://engineeredrepinc.com/wp-content/plugins/super-forms/uploads/php/files/3cdfaff0c63880fc42cf4ad5d3fb1d85/24497304332.pdf
    • http://geodez.com/pliki/file/tewifama.pdf
    • https://strategieb2b.com/userfiles/file/27085639538.pdf
    • http://phannhan.vn/files/usersfiles/files/fitot.pdf
    • http://www.kizkulesikizogrenciyurdu.com/public/ckfinderuploads/files/kurokike.pdf
    • http://www.skupp.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1609e82b95742f---keboxigefebekenunetirova.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=the+black+cat+pdf+with+questions
    • 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_off00010260.bin
49dcdb42fd936b3168685fe933375d2a277b2fcece637acc5c52ae5d906fb399
pdf-font-stream PDF embedded font (sfnt) at offset 0x10260 11144 bytes
font_01_sfnt_off00011c02.bin
af3af2b62c348b9b3b1343812b778b9bfc0ea217ca40206dd023547ad9a1cec9
pdf-font-stream PDF embedded font (sfnt) at offset 0x11C02 17744 bytes
font_02_sfnt_off000149d9.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x149D9 16792 bytes