Malicious PDF — malware analysis report

Static analysis result for SHA-256 44c30e504921d40d…

MALICIOUS

PDF

71.8 KB Created: 2021-09-30 23:49:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: 083222212c764f7daddf5e245c8a1203 SHA-1: 1899500572d1b18a37e74a2c48d1ddc7d97a5678 SHA-256: 44c30e504921d40dd1ed99e00e113300870e0815f98e70e84b0ab048872e0e88
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on disposable domains or compromised CMS uploads, indicating a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://pistant.ru/uplcv?utm_term=screen+mirroring+mi+tv+stick PDF link annotation
    • https://blueparadise.pl/userfiles/file/71652462231.pdfIn PDF document text
    • http://bidwoodmachine.com/d/files/powajavolur.pdfIn PDF document text
    • http://intranet.uts.edu.co/portal/app/ckfinder/userfiles/files/tigetulati.pdfIn PDF document text
    • http://rabotatver.ru/userfiles/admin/mowizijifafexobexigazobaz.pdfIn PDF document text
    • https://snabavto.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135cf6389a61---47267095344.pdfIn PDF document text
    • http://maxitelt.no/wp-content/plugins/formcraft/file-upload/server/content/files/161365444b7f7f---58693894803.pdfIn PDF document text
    • http://www.pattyn360.com/upload/forum/files/zoredoxujobe.pdfIn PDF document text
    • https://metnar.pl/web/uploads/files/fajitufogofaguwevure.pdfIn PDF document text
    • https://lazdynumokykla.lt/userfiles/file/sexave.pdfIn PDF document text
    • http://struttur-arch.it/userfiles/files/81692725746.pdfIn PDF document text
    • http://ljjxmining.com/uploadfile/file///2021091723494859.pdfIn PDF document text
    • http://3handseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/161493e66c10a4---wesekazefotelozam.pdfIn PDF document text
    • https://casaalu.com/luutru/files/vefelijifi.pdfIn PDF document text
    • http://residenzaeden-albisola.com/userfiles/files/toxaz.pdfIn PDF document text
    • http://jinanxintiandi.com/userfiles/files/91846751753.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/s85g321iomhoo01t3uj7vnsv75/finatijuvokuxa.pdfIn PDF document text
    • https://maciejabramowicz.pl/upload/files/file/dodivukavodimodi.pdfIn PDF document text
    • http://ac-kenigsberg.ru/files/file/tuvamevupel.pdfIn PDF document text
    • https://kligi.viart.lt/ckfinder/userfiles/files/77914019746.pdfIn PDF document text
    • http://wbbray.com/wp-content/plugins/formcraft/file-upload/server/content/files/16153683a91ab5---vavuratomuwoxarewizerixuv.pdfIn PDF document text
    • http://kapfenberger-schuetzenverein.at/userfiles/file/84640347775.pdfIn PDF document text
    • https://bushregenerators.biz/userfiles/files/ravujakedogetudizon.pdfIn PDF document text
    • https://stotex.rs/files/15834655697.pdfIn PDF document text
    • http://888chji.com/userfiles/files/duzogilujagefazunuxikiwa.pdfIn PDF document text
    • 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_off0000b3ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB3CE 10596 bytes
SHA-256: 5b7835cef997086afff95fd45510bfa0acd92d8a1295da6f73337280ee264421
font_01_sfnt_off0000cc09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC09 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e41b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE41B 18504 bytes
SHA-256: 46179142962169a5ad0a77ce71aa6166720ea6539e01ac76f930daa08e0ffd8a