Malicious PDF — malware analysis report

Static analysis result for SHA-256 20a93d46a0d3732c…

MALICIOUS

PDF

96.4 KB Created: 2021-07-27 21:32:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 35ce576697b6c5be740b16abc7dcbcc5 SHA-1: bea45a5be470490a11e954a052cb1c2343766726 SHA-256: 20a93d46a0d3732c1bdfaf732f53a6d14f21558d82ec92372164286eba5de00b
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. It contains numerous links, many pointing to compromised CMS upload storage or disposable hosting, suggesting it functions as a link farm. The embedded URLs are likely intended to redirect users to malicious sites for phishing or malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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://exclusivelimoservice.com/ckfinder/userfiles/files/59405623342.pdf In PDF document text
    • http://chalappuram.com/userfiles/file/dowofugof.pdfIn PDF document text
    • https://muacash.com/webroot/img/files/79940546982.pdfIn PDF document text
    • http://www.cerel.eu/images/wyswig_images/file/50039104974.pdfIn PDF document text
    • https://solarconsulting.org/wp-content/plugins/super-forms/uploads/php/files/20531d8a999b16c176a06371d5772437/wisafobuleluzupomoforipon.pdfIn PDF document text
    • http://exosportsante.fr/ckfinder/userfiles/files/53765898352.pdfIn PDF document text
    • http://www.netcorp.hu/data/editorfile/29538655008.pdfIn PDF document text
    • https://sarujiovalente.com/wp-content/plugins/super-forms/uploads/php/files/imnc4bv9tp43b4rp089v8k3hi2/vokojigelezolupezujawex.pdfIn PDF document text
    • http://maidnheaven.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098baac62118---tebesunomifinuxufedonofuz.pdfIn PDF document text
    • https://badrivishal.com/media/walit.pdfIn PDF document text
    • https://www.cir.cloud/wp-content/plugins/formcraft/file-upload/server/content/files/160795a4673150---10880147637.pdfIn PDF document text
    • http://fedoro.ru/upload/file/pefugal.pdfIn PDF document text
    • http://bascobrunswick.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608c11d5f3ae2---54913075870.pdfIn PDF document text
    • https://beytarimcilik.com/admin/editor_resim/file/xawazufopudapadove.pdfIn PDF document text
    • http://www.telsercom.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092395bebe22---xokaxedebugadevekodamik.pdfIn PDF document text
    • http://clarksville.net/wysiwygfiles/file/rakojax.pdfIn PDF document text
    • https://yukkumpulgroup1.com/contents//files/faxufevuvikifamakabewi.pdfIn PDF document text
    • http://omonetach.pl/foto/ilustracje/file/puxopujupadaxegimisa.pdfIn PDF document text
    • http://webinaris.training/ckfinder/userfiles/publics/files/87087971891.pdfIn PDF document text
    • https://communeouchamps.fr/userfiles/file/kekezusaruz.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/26dra9s4i7mqamn1p99gdgdvt3/nelujak.pdfIn PDF document text
    • http://www.fullmooneye.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5e656bc3d4---gugarebodu.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/lemosutasedariziwevi.pdfIn PDF document text
    • http://cga82.com/admin/File/90602056209.pdfIn PDF document text
    • http://gps-tw.com/CKEdit/upload/files/bobujegivupinatewajesu.pdfIn PDF document text
    • http://jarosi.hu/files/file/marizalamemuza.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=the+avengers+game+apkpurePDF 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_off000117e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117E6 10564 bytes
SHA-256: 3fd2f6ff3eee3f085879e0a1b7addd7c20ea002982b3092e0d9a591f36fbe058
font_01_sfnt_off00012fcc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FCC 16656 bytes
SHA-256: 24d5f1488777da0f9069f061633c4fcb056f6858bfafe3853872c5fc7788407d
font_02_sfnt_off00015b2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15B2B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1