Malicious PDF — malware analysis report

Static analysis result for SHA-256 e96e16130f7bc0dc…

MALICIOUS

PDF

84.2 KB Created: 2021-09-11 11:48:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 072844d54389e7122fd744afaab23497 SHA-1: 37971c5d1e3a5ee675409de3c9566357a145fab0 SHA-256: e96e16130f7bc0dc7c8fe169ca18c72a82307f3cc576f971181b5d0f4fada361
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs that form a link farm, with several pointing to compromised WordPress upload storage and disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with techniques used to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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.companyforte.com/imagenes/editor/file/padenopifedapow.pdf In PDF document text
    • http://gachtrangtritranvinhtin.com/gachtrangtritranvinhtin/Images_upload/files/ravidaseduj.pdfIn PDF document text
    • http://branpc.in/ckfinder/userfiles/files/6007205794.pdfIn PDF document text
    • http://odumakus.com/uploads/files/nadonarafowaleka.pdfIn PDF document text
    • http://eventpro-kontraktorpameran.com/uploaded/files/xuwaxalidelamuwa.pdfIn PDF document text
    • http://vetsnab32.ru/userfiles/file/38777984084.pdfIn PDF document text
    • http://simkoongschool.com/uploads/editer/files/1503468647.pdfIn PDF document text
    • http://albino-pitti.com/pub_img/file/fujaruxat.pdfIn PDF document text
    • https://best-label.com/upload/files/89540714225.pdfIn PDF document text
    • http://bioident.pl/photos_fck/file/ziwabebelejewudomomunewe.pdfIn PDF document text
    • http://barrospizzadb.com/uploads/files/36667924523.pdfIn PDF document text
    • http://solartgaleria.hu/images/file/tunarorese.pdfIn PDF document text
    • http://kkagro.com/media/images/upload/file/soxejoxufanegajefesizulib.pdfIn PDF document text
    • http://wonderpanel.com/app/webroot/img/file/68671436015.pdfIn PDF document text
    • http://henghuitong.com/jingkelun/userfiles/files/20210904231810.pdfIn PDF document text
    • http://maginsaatmetal.com/resimlerfiles/70947380608.pdfIn PDF document text
    • https://warungmimpishio2.com/contents/files/52006633554.pdfIn PDF document text
    • http://www.korayozelguvenlik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a02aa894a8---xaduzojozobuvojamepeta.pdfIn PDF document text
    • https://tcufroghouses.com/wp-content/plugins/formcraft/file-upload/server/content/files/161395128892aa---mapisebog.pdfIn PDF document text
    • https://phoenixknights.co.uk/wp-content/plugins/super-forms/uploads/php/files/1e8b7d2fab8e8e4ec939a46b49280f1b/gibewotut.pdfIn PDF document text
    • http://pivotal-technologies.com/userfiles/file/38711845846.pdfIn PDF document text
    • https://artasedanasingaraja.com/uploadfck/file/dowabokekitajilixugus.pdfIn PDF document text
    • https://uangraja.com/contents/files/kadefapevitipifom.pdfIn PDF document text
    • https://limberhurstgallery.com/imageuploads/file/31474892136.pdfIn PDF document text
    • http://aaz.sk/editor_uploads/files/78884953227.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=convert+radians+to+arcsecondsPDF 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_off0000e03a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE03A 10416 bytes
SHA-256: 194b93c466a704be04de3db439956a92954002744a2afa0afdf454b630310277
font_01_sfnt_off0000f807.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF807 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011019.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11019 19160 bytes
SHA-256: 00d4ff74d68daa177e319c959eb85e432f48363acd8e27bf59b2b7917492b697

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