Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3ed06543615343e…

MALICIOUS

PDF

80.0 KB Created: 2021-09-20 03:24:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 6b74a7f731af222f1c2b81b823fc1a2a SHA-1: 7947a4a35df1bb2e91208b67bea79d203717a944 SHA-256: e3ed06543615343e1f0652db2e42218ddb446dbda674f8e2a05c9aab4d9d5791
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. It contains numerous embedded URLs that likely lead to phishing sites or further malware downloads. The PDF structure and embedded content suggest it's part of a phishing campaign, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://philabc.ru/uplcv?utm_term=degrees+of+irons+and+wedges PDF link annotation
    • https://roadtoring.com/wp-content/plugins/super-forms/uploads/php/files/b770ea62f4a4a8668f62334c22ceb03c/pimoxu.pdfIn PDF document text
    • https://chungcungoaigiao.vnpec.xyz/uploads/files/27174190341.pdfIn PDF document text
    • http://becskeicsodajo.hu/admin/fck_upload/file/80055220901.pdfIn PDF document text
    • http://www.s-prom.si/fileupload/file/65868076562.pdfIn PDF document text
    • http://swvocal.com/data/se2/file/vuzagigifofuzapo.pdfIn PDF document text
    • http://vivaibonomo.it/userfiles/files/foderitaj.pdfIn PDF document text
    • https://optimustelecoms.com/ckfinder/userfiles/files/xovavozotifaxevinina.pdfIn PDF document text
    • https://xn--z4qq44i.tw/upload/actfiles/60384905376.pdfIn PDF document text
    • http://laserbeautymachine.net/d/files/56580088763.pdfIn PDF document text
    • http://sportsclinicwest.ie/media/contents/file/wigopozozawudetukiruni.pdfIn PDF document text
    • http://ser-buk.com/userfiles/file/92334692251.pdfIn PDF document text
    • http://travellerisland.com/files/45284724893.pdfIn PDF document text
    • https://prosaison.fr/userfiles/files/74498555881.pdfIn PDF document text
    • http://annabarons.com/files/files/35469723819.pdfIn PDF document text
    • http://drivescuolaguida.it/userfiles/files/jigilaforodotanaxoves.pdfIn PDF document text
    • https://digireg.nu/upload/popesex.pdfIn PDF document text
    • https://lyonsinn.com/nbloom/fckuploads/file/bagep.pdfIn PDF document text
    • http://kuwaited.com/cote_dor_import/admin/ckfinder/userfiles/files/57419439984.pdfIn PDF document text
    • http://brainbond.ro/userfiles/file/44063981100.pdfIn PDF document text
    • http://aceonlinementors.com/userfiles/file/bagigupukure.pdfIn PDF document text
    • http://sdds.be/userfiles/file/76836722583.pdfIn PDF document text
    • http://a-range.ru/wp-content/plugins/formcraft/file-upload/server/content/files/161311e34052ed---jotivalujegijakesopopupo.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_off0000d41b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD41B 17816 bytes
SHA-256: d18d23dc366cbe6fb8e0412d084b629e790e964a05d0fd03ccac7e7df783faea
font_01_sfnt_off00010299.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10299 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011ab0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AB0 10472 bytes
SHA-256: 9830cb00894e60bdeedb23c64e947c721c76dc70dec1ac8075bcaa52d30072e1

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