Malicious PDF — malware analysis report

Static analysis result for SHA-256 df8965f2466de54f…

MALICIOUS

PDF

72.9 KB Created: 2021-09-05 08:51:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-17
MD5: a1310e8da06a1795f2ec441dff701d95 SHA-1: 729628a1d0d3641d234ccf0464285a8030db5ce5 SHA-256: df8965f2466de54f24af960a93ed01c1d9822824f9625a19fdda422928b5c142
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites utilizing plugins like 'formcraft' and 'super-forms' for file uploads. This suggests the PDF is designed to lure users to malicious or compromised websites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or distributing further malware.

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 https://teenvolunteer.org/wp-content/plugins/super-forms/uploads/php/files/b70b771412001363805e3202caa7ed9b/81706820122.pdf In PDF document text
    • http://www.risingstars.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1607e4f0bb6bea---tivabobuw.pdfIn PDF document text
    • http://freetds.net/userfiles/file/10178363339.pdfIn PDF document text
    • https://arenda1s.ru/wp-content/plugins/super-forms/uploads/php/files/a088ac373035bc777b10391f605ce772/jixirewobewodasutiburefi.pdfIn PDF document text
    • http://lyshiying.com/d/files/bazafugapazobitajaxaregar.pdfIn PDF document text
    • https://vatlieutaphu.com/upload/files/tiwujisege.pdfIn PDF document text
    • https://reparationmobile.net/userfiles/file/88410635798.pdfIn PDF document text
    • http://bmhs1963.com/clients/7/72/7286fd37811b7a5dece6e69924e4d5ab/File/77088595703.pdfIn PDF document text
    • http://studiomontironi.eu/userfiles/files/lirebazalerodimufirokik.pdfIn PDF document text
    • https://ladychief.com/wp-content/plugins/super-forms/uploads/php/files/658648cb5a0c27b1a76feadf2c476599/45400680585.pdfIn PDF document text
    • https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/16109256323756---ribugejukufepomomiwid.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/5snr0ktr0sti6b0acg1ehaqr86/75295450008.pdfIn PDF document text
    • https://acornschoolcharleston.org/wp-content/plugins/super-forms/uploads/php/files/f4107ae820dde6a25a9d1e640076ef4c/6313324465.pdfIn PDF document text
    • https://aquariumfargo.com/wp-content/plugins/super-forms/uploads/php/files/6feb915b0e0afb9c38919eccc99be333/viledajed.pdfIn PDF document text
    • http://strefa-fitness.pl//fckeditor/editor/filemanager/connectors/phpplikifile/kenirakozowoz.pdfIn PDF document text
    • http://wccflooring.com/userfiles/files/81813567981.pdfIn PDF document text
    • https://vdbergelectro.nl/wp-content/plugins/super-forms/uploads/php/files/c81f4ff0e2aa828fb4ed9f10a431e596/kuliribelilojezuf.pdfIn PDF document text
    • https://xn--78-6kce7dfhb9dwb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/66ceca3a341cba107bdfce243bf30934/41957585415.pdfIn PDF document text
    • http://noithatdangcap.vn/app/webroot/uploads/files/kevesasixopitage.pdfIn PDF document text
    • http://divorce-difficile.fr/userfiles/file/gabewodo.pdfIn PDF document text
    • http://mineraux-et-lithotherapie.fr/ckeditor/upload/files/wivojunulibebona.pdfIn PDF document text
    • https://giritrademark.com/content_files/files/30470976029.pdfIn PDF document text
    • https://rcot.org/userfiles/file/35780590242.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=kymco+ak+550+manualPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bc18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC18 16376 bytes
SHA-256: 562677b2840368305ae7c6239518be77cffe769b216139f46f10506026d99794
font_01_sfnt_off0000e660.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE660 10356 bytes
SHA-256: 87d87d276c3275bdaa24fb92dee0e47e786dc42935bae10c475e61607200f975
font_02_sfnt_off0000fdd4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDD4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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