Malicious PDF — malware analysis report

Static analysis result for SHA-256 2bdd2ce86c6bbf55…

MALICIOUS

PDF

70.9 KB Created: 2021-09-07 00:30:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: b8f9f9f39a2523af2f7f236e349843fc SHA-1: 3b422daaeb345efeca493c823708c38be9393610 SHA-256: 2bdd2ce86c6bbf55dc17b299671ab370cc900e3a35879c1f578f17818bda48a7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV detecting it as a phishing trojan. The file contains numerous external URLs, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the nature of the heuristics indicate a phishing or malware distribution attempt, likely initiated via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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://queure.ru/uplcv?utm_term=integrated+chinese+textbook+level+2+part+2+pdf PDF link annotation
    • http://xn----7sbqwxdbhblh2h.xn--p1ai/data/file/46949252731.pdfIn PDF document text
    • http://portalpr-b2b.es/img/user///file/_0723942001625123790.pdfIn PDF document text
    • http://netcentricnj.com/ckfinder/userfiles/files/72420431202.pdfIn PDF document text
    • https://bya-ingenieria.com/ckfinder/userfiles/files/84892380021.pdfIn PDF document text
    • https://anjingliar.com/contents//files/22729085845.pdfIn PDF document text
    • http://watthaistuttgart.de/userfiles/file/39625061298.pdfIn PDF document text
    • https://outsourcedbackoffice.co.uk/wp-content/plugins/super-forms/uploads/php/files/a5103ce89eb130bd8f109f65fd57ef47/baxetovigobena.pdfIn PDF document text
    • https://www.formwork.co.uk/wp-content/plugins/super-forms/uploads/php/files/i6h10pdq26a7b3mcirkik4vog3/58317660622.pdfIn PDF document text
    • http://jyotiacademicpress.org/uploads/file/jilumenenaseka.pdfIn PDF document text
    • http://cameronhaddock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a55e0b3896f---27842257591.pdfIn PDF document text
    • https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071c220202e1---pisomasekixugukubosalad.pdfIn PDF document text
    • https://inchirieriavioane.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160e5f674dafa2---pevimirugifob.pdfIn PDF document text
    • http://jamoncup.es/wp-content/plugins/formcraft/file-upload/server/content/files/1607ca02f27aa7---bipurupan.pdfIn PDF document text
    • http://pnc21.com/files/fckeditor/file/307808840612901b1495ac.pdfIn PDF document text
    • http://frutapacargentina.com/ckfinder/userfiles/files/vuratukosuwewamitabu.pdfIn PDF document text
    • https://patriot.ch/wp-content/plugins/super-forms/uploads/php/files/j48h9aragtl6klum5kj57giaum/bofulufeviwafodazumus.pdfIn PDF document text
    • http://year-c.com/upload_fck/file/2021-6-14/20210614070958498631.pdfIn PDF document text
    • https://slide-bearing.com/d/files/tarixepamezuneniwajujak.pdfIn PDF document text
    • http://www.mkkdigital.pt/wp-content/plugins/formcraft/file-upload/server/content/files/160a10994037c9---pituwenogadaduxajumefalar.pdfIn PDF document text
    • http://angarakshaksecurity.com/userfiles/file/vewobelupi.pdfIn PDF document text
    • http://polishingmarblefloor.it/userfiles/files/difiwulomimimeza.pdfIn PDF document text
    • https://drmarlenebothma.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16096d8a6171c6---40682571438.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_off0000b2c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB2C1 15896 bytes
SHA-256: 4aedb24eaddb66c44c11889c8ec0588c3117916fa1bf3790f6e15ab2aa3d5cf1
font_01_sfnt_off0000db76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB76 11368 bytes
SHA-256: 2214e613c55ca83b4a1e926b6ad2a3512f17c57b9dc61dcf3035c45a6b2843d0
font_02_sfnt_off0000f5d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5D1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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