Malicious PDF — malware analysis report

Static analysis result for SHA-256 03c9fdbdbb050ac5…

MALICIOUS

PDF

85.3 KB Created: 2021-09-01 01:22:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: f06264247b3d3423cd370a8d064a1a28 SHA-1: 8e6c9f50291f55fa493eab5f0385f20f70af71ad SHA-256: 03c9fdbdbb050ac57ece5286e1957819079bed0e0e33aac87f208e5bd12c1c45
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 identifying it as Pdf.Phishing.Trojan. The numerous embedded URLs, many pointing to compromised CMS upload directories or disposable hosting, suggest a link farm designed to redirect users to malicious sites. The file's structure and URL patterns are consistent with phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://allytemp.ru/uplcv?utm_term=white+with+green PDF link annotation
    • https://www.lorenzofranzone.it/wp-content/plugins/super-forms/uploads/php/files/01a22f701ea8ba01330277f7f4f020fb/99108551699.pdfIn PDF document text
    • https://lakeshoresmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/6m6akdvt35gddtn3g1es138hu5/36367124763.pdfIn PDF document text
    • https://cremeconferences.com/wp-content/plugins/super-forms/uploads/php/files/890ee30adf5c4463df62928717a82a9b/negixaxifipoxesikimiwijip.pdfIn PDF document text
    • https://vinadesigndanang.vn/uploads/image/files/riwolunevum.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/76237850498.pdfIn PDF document text
    • https://hogies.com/includes/template/uploads/file/nebulogisatan.pdfIn PDF document text
    • http://becro-plast.hr/wp-content/plugins/formcraft/file-upload/server/content/files/16085f3a73e719---45636479578.pdfIn PDF document text
    • http://jgbt.us/pds/userfiles/files/97663577440.pdfIn PDF document text
    • http://rcp-ranstadt.us/files/xivitelivewelutigofalakil.pdfIn PDF document text
    • http://fapannimario.it/userfiles/files/dilumono.pdfIn PDF document text
    • https://fotobolfestmeny.hu/mvc/userfiles/file/teropowod.pdfIn PDF document text
    • http://blesk-stroy.ru/userfiles/files/voturavefaditogiluluto.pdfIn PDF document text
    • http://alibabashipping.com/userfiles/file/24813464219.pdfIn PDF document text
    • https://pmeds.us/userfiles/file/10934519750.pdfIn PDF document text
    • http://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1608c26842eaec---wimuruwag.pdfIn PDF document text
    • http://mensagemcrista.com.br/ckfinder/userfiles/files/tokurixavosodadipe.pdfIn PDF document text
    • http://resortvillairene.it/userfiles/files/4526446808.pdfIn PDF document text
    • https://estidevelopers.com/wp-content/plugins/super-forms/uploads/php/files/1aeb704a23d2d1ecfee46ca3a424e1dc/74768497794.pdfIn PDF document text
    • https://www.freshstartdigitalmarketing.com/wp-content/plugins/super-forms/uploads/php/files/a47a544d7691caac8ca6d3ef305f2927/bivavevirakejekeg.pdfIn PDF document text
    • https://lapalettedesarts.fr/gestion/file/45834456084.pdfIn PDF document text
    • http://gurukripapublicschool.org/userfiles/file/resiza.pdfIn PDF document text
    • http://arlingtonhigh1961.com/clients/e/ef/ef36f0800c0a5d5a0b00d5ecc8c3c6da/File/5388517913.pdfIn PDF document text
    • https://www.llgnjinc.com/wp-content/plugins/super-forms/uploads/php/files/a169ea7671da83facaca544e1e916c70/zasutisagi.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_off0000eb8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB8E 17676 bytes
SHA-256: fb693444a30fc980ebbcc32352992dd5e2c615ea6933ef4d02f54f775f2ecb9e
font_01_sfnt_off0001197f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1197F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013195.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13195 9968 bytes
SHA-256: 73678f1bee7834efa2d185b335726e70e380435a86c56a27f187e668d928e742

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