Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e5a48b6332a59ed…

MALICIOUS

PDF

84.1 KB Created: 2021-09-02 12:57:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 5606a1aa4fe8ff36afc86e302daee03f SHA-1: bf300fe500d1b62e47456c152b751507225d9517 SHA-256: 0e5a48b6332a59edac06caad5c085f157bd63b9448c05abb7686ad1c6e3441c7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous URLs that point to potentially compromised websites or disposable domains. The presence of these links suggests the document is designed to lure users to external sites, likely for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://philabc.ru/uplcv?utm_term=bilingual+education+in+the+21st+century+garcia+pdf PDF link annotation
    • http://ddgasul.com/userfiles/file/teleboxugukuk.pdfIn PDF document text
    • https://www.marvistasales.com/wp-content/plugins/super-forms/uploads/php/files/13fe7e92dcb81275c5995bb8d6b9e70c/53648798876.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/89448250371.pdfIn PDF document text
    • https://okinawa4d.com/contents/files/gizidesi.pdfIn PDF document text
    • https://mattweidnerlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ec299ca746---3203264889.pdfIn PDF document text
    • https://sealskinz.ru/files/file/ferezel.pdfIn PDF document text
    • https://cruiseship.cruises/wp-content/plugins/super-forms/uploads/php/files/3e22rqtprr4q5r3l37r8v26bdq/99738975638.pdfIn PDF document text
    • http://cbelmira.com/wp-content/plugins/super-forms/uploads/php/files/514622njv73ukag4m8rr83h5c1/25836844980.pdfIn PDF document text
    • http://teakdeck.pl/files/file/98573091797.pdfIn PDF document text
    • http://www.grundys.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a5fc26ef7b8---69444763651.pdfIn PDF document text
    • http://feldbach-tourismus.at/files/jabuzinolidanebizuvikalu.pdfIn PDF document text
    • http://amuseonline.com/absite/userfiles/file/zodisibafapamoxesop.pdfIn PDF document text
    • http://inlikeflintlogistics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c526097398d---48914755839.pdfIn PDF document text
    • https://rhagro.com.mx/wp-content/plugins/super-forms/uploads/php/files/d8b4779718c9e802000a28e7e5f0931d/93438622513.pdfIn PDF document text
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a89b070e7c5---siwuruseruj.pdfIn PDF document text
    • http://stroynerud-sm.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1606d2edec2b05---topabamu.pdfIn PDF document text
    • http://datcat.vn/2018/file/wiwavamosugaxowoxesomi.pdfIn PDF document text
    • https://bursakaynak.com/userfiles/file/fakefa.pdfIn PDF document text
    • http://easternsheep.by/app/upload/file/18719209809.pdfIn PDF document text
    • http://afgventuregroup.com/cfiles/file/69810820793.pdfIn PDF document text
    • http://sherwoodchambergolf.org/ckfinder/userfiles/files/vakobisat.pdfIn PDF document text
    • https://oazapiekna.com/zdjecia/fck/file/12694131827.pdfIn PDF document text
    • https://edarky.net/data/file/tekitedo.pdfIn PDF document text
    • http://bartuceviri.com/userfiles/file/jarujawisotapikisuvat.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_off0000e0b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0B1 17912 bytes
SHA-256: 3ccffbf8eb8c76208033b1c74201f5fe0cddcbd14727152a81e272b646d139b7
font_01_sfnt_off00010fb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FB2 11340 bytes
SHA-256: 4b768bebb96355a2f15c7b016b2f6efa280eadba6cb97666210cdc05a5cf25ed
font_02_sfnt_off00012a3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A3E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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