Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb45d37c5d78ed02…

MALICIOUS

PDF

75.4 KB Created: 2021-09-04 14:54:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: d8fd2baade75e55af92c243a307e5261 SHA-1: ba1fbba91594dc03a31b97cb2a5d6c23646aa66d SHA-256: bb45d37c5d78ed02b1d99d03a6b12a9a171ba941bda77d714225a7fa165d6c21
156 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded URLs, many of which point to domains that appear to be compromised or disposable. The ML classifier and ClamAV detection strongly indicate maliciousness, likely related to phishing or SEO spam. The document's structure as a link farm suggests an attempt to redirect users to malicious sites or manipulate search engine rankings.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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.chiringuitomediterraneo.com/ckfinder/userfiles/files/52389182973.pdf In PDF document text
    • http://evohome.pl/userfiles/file/37318493978.pdfIn PDF document text
    • http://freeware-software-download.de/uploads/editor/file/mefitozo.pdfIn PDF document text
    • https://www.davidcosz.de/wp-content/plugins/super-forms/uploads/php/files/1ghrs5cg0igp0gtkjevkj7pche/22908807431.pdfIn PDF document text
    • http://vijyaiprismcrm.com/userfiles/files/18033275485.pdfIn PDF document text
    • http://www.tenniscanberra.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160bdf9ba40fe0---pomedaxegelon.pdfIn PDF document text
    • https://hotelmitrutarija.com/uploaded/files/35925621859.pdfIn PDF document text
    • http://kubkao-kubpla.com/userfiles/files/95738046997.pdfIn PDF document text
    • http://alteredcompta.com/buddha/ckfinder/userfiles/files/67835307257.pdfIn PDF document text
    • http://nakakinpump.kr/fckeditor/upload/file/10159389357.pdfIn PDF document text
    • http://queensparkview.com/image/upload/File/50856793701.pdfIn PDF document text
    • https://thepetrichortouch.com/wp-content/plugins/super-forms/uploads/php/files/7pcf0i336s6j9b8ch4ha1qr03c/kefekixomuvejake.pdfIn PDF document text
    • http://www.next-conseil.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1609f165cc8291---resefofaweribatipuj.pdfIn PDF document text
    • http://bazatalty.pl/wp-content/plugins/super-forms/uploads/php/files/f4f6e941176b2d9353494608212a5b5b/50689367969.pdfIn PDF document text
    • https://nuttydog.hu/ckfinder/userfiles/files/81075130135.pdfIn PDF document text
    • http://bobas24.pl/Upload/file/vamuninozotubumupawofa.pdfIn PDF document text
    • https://m-co.de/wp-content/plugins/super-forms/uploads/php/files/csnoqp4qmijb3drj70dcjbfjpi/ruxurasoja.pdfIn PDF document text
    • http://kiavysocina.cz/UserFiles/File/16557788726.pdfIn PDF document text
    • https://asiaviews.org/wp-content/plugins/super-forms/uploads/php/files/3f0iueo9m80m0fb4881d1qc9g7/52683408066.pdfIn PDF document text
    • https://anakaygame.com/calisma2/files/uploads/73738367579.pdfIn PDF document text
    • http://arcomproltd.com/userfiles/file/73128422228.pdfIn PDF document text
    • https://kvgrup.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/1607b00b423916---59560681090.pdfIn PDF document text
    • https://dichvumayphoto.vn/webroot/img/files/libozimidutujofemipekodot.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=ymca+moncton+schedule+pdfPDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bf90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF90 18408 bytes
SHA-256: 7f1a7a4ac879d3c4cf6ff97fd2da19c433f974650fa95098895dd15097362fba
font_01_sfnt_off0000ef6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF6C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010783.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10783 10776 bytes
SHA-256: e12884852c47159c038ded6883b503588fe3f444f4802c08d79a605c3dddb49c

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