Malicious PDF — malware analysis report

Static analysis result for SHA-256 90df286e9066797a…

MALICIOUS

PDF

92.0 KB Created: 2021-08-13 16:56:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: e253f7f243f9c3102e450bd52e525d78 SHA-1: 6943ce10ceab7313059dfee62c8e2a580c8b503d SHA-256: 90df286e9066797a20bc7a81132689b8653a825dcf30aea2f5d83f7bdae15b8f
156 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, with heuristics indicating it functions as a link farm. Multiple URLs point to compromised CMS uploads and disposable hosting, suggesting an attempt to lure users to external sites. The primary attack pattern involves directing users through a series of links, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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://www.idromeccanicasrl.com/idromeccanicasrl.com/wp-content/plugins/super-forms/uploads/php/files/52c826874b8831a8935f4378ae6cd05a/61006015292.pdf In PDF document text
    • http://travellightnepal.com/userfiles/file/telexuxijekavidemugebex.pdfIn PDF document text
    • http://challendor.com/fckeditor/upload/file/18930370468.pdfIn PDF document text
    • https://glosunspa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aad02b2925b---kojemifumanibi.pdfIn PDF document text
    • http://gagutp.com/sa_upload/userfiles/file/20210602161609.pdfIn PDF document text
    • http://chinazzjx.com/d/files/55358113120.pdfIn PDF document text
    • https://etonbio.com/newsLetters/images/file/zukakaroxusoxupe.pdfIn PDF document text
    • http://reklamavysocina.cz/UserFiles/File/90712157554.pdfIn PDF document text
    • https://floorco.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/2e3f45d22cb5b39e3f74f8f603af2479/dotetatifitanajibated.pdfIn PDF document text
    • http://www.altrus.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1609fb0d448a83---3225978158.pdfIn PDF document text
    • https://www.entornopublicitario.com/wp-content/plugins/super-forms/uploads/php/files/118e353951b609fe39dcbfdfac1e4fe7/dugogene.pdfIn PDF document text
    • http://thebestpearsonfamily.com/clients/e/e6/e6a49a9b6fa3fb0349b1957bd02e8b5b/File/21922284798.pdfIn PDF document text
    • https://www.frontiermyanmar.com/sites/all/libraries/ckfinder/userfiles/files/45611675090.pdfIn PDF document text
    • http://lctrading-gmbh.com/ckfinder/userfiles/files/zekadawa.pdfIn PDF document text
    • http://studiotecnicoarduini.eu/userfiles/files/56774703483.pdfIn PDF document text
    • http://teleinwestor.com/userfiles/file/runugesomidisawezik.pdfIn PDF document text
    • https://qualitycountscleaning.com/wp-content/plugins/super-forms/uploads/php/files/2d65cb5f39c82e9c1b8a251085355e8c/loxoduxi.pdfIn PDF document text
    • http://uyaviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d67a64a25b8---vobavifenadakelaguda.pdfIn PDF document text
    • http://flomojapan.com/upload/files/noxilomodebufimu.pdfIn PDF document text
    • http://www.holderit.com/wp-content/plugins/formcraft/file-upload/server/content/files/161011acccc1d9---79043691842.pdfIn PDF document text
    • http://vegasoft.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160aa08a7efb2f---vomasitugamutat.pdfIn PDF document text
    • http://adria-ex.com/images/blog//file/nilusubeluxaz.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=julius+caesar+act+1+scene+3+summary+and+analysisPDF 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_off00010041.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10041 18040 bytes
SHA-256: 8a9a3c74bfaf69dfb69932d74b43da90c49cb60dcbc6d7c5758765269e6cb1a3
font_01_sfnt_off00012fc9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FC9 10840 bytes
SHA-256: 1f9f77035011ccb2a807550cbb0626572090cedfffb531948edec7c9b7ff1a66
font_02_sfnt_off000148e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x148E9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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