Malicious PDF — malware analysis report

Static analysis result for SHA-256 68b970b153a1dd13…

MALICIOUS

PDF

96.3 KB Created: 2021-08-12 10:27:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: b5a091dbd0ed3ffaf7c6660334b4560e SHA-1: 7a18bf29da4c2ba36f3d717d08c41ebe554ba1a9 SHA-256: 68b970b153a1dd13956abf09c85f4141658afb13850834a10ec8e3d0dcee2d68
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of external links, many of which point to websites hosted on compromised CMS platforms or disposable hosting. This behavior is characteristic of a link farm used to distribute phishing content or malware. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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 https://pixomot.ru/uplcv?utm_term=libro+la+virtud+del+egoismo+ayn+rand+pdf PDF link annotation
    • http://dalnoboy.net/data/filestorage/upload/files/2278008916.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/limowuxakefosa.pdfIn PDF document text
    • http://flirdining.com/uploads/files/766993036.pdfIn PDF document text
    • https://bechtoldpaving.com/wp-content/plugins/super-forms/uploads/php/files/0fc14da778299a440dec4d8da1a8443f/budak.pdfIn PDF document text
    • https://chp-travel.ir/data/file/84224460827.pdfIn PDF document text
    • http://www.consorcio.edu.pe/wp-content/plugins/formcraft/file-upload/server/content/files/16083fea842349---zinuwut.pdfIn PDF document text
    • http://superpart.com/files/12677210952.pdfIn PDF document text
    • https://www.rosebankprimary.co.za/inc/ckfinder/userfiles/files/2811352597.pdfIn PDF document text
    • https://inchiriereelicoptere.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160707dfc822a7---balipok.pdfIn PDF document text
    • http://bukharageorgia.com/sites/default/files/file/zesimapopesov.pdfIn PDF document text
    • http://www.zopfitravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b31e7296997---fugonunaloxabukazudulaj.pdfIn PDF document text
    • https://growmytruck.com/wp-content/plugins/super-forms/uploads/php/files/92f913192305bdf9a7c9b2e383589a34/jakuxakevim.pdfIn PDF document text
    • http://easternhoteljeju.com/FileData/ckfinder/files/20210730_BA86C4C63811666F.pdfIn PDF document text
    • https://voolabs.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607056880c8fa---lujotibojavulolebitene.pdfIn PDF document text
    • https://www.kiteschule-eckernfoerde.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b0a44f1d706---mamuluzefeselusagezuvi.pdfIn PDF document text
    • https://www.toptalentusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c51481548ee---3657525031.pdfIn PDF document text
    • https://belgradenightlife.info/wp-content/plugins/super-forms/uploads/php/files/k20ruj391v4kb7ag1udn5t523p/gebafune.pdfIn PDF document text
    • http://lateonsettay-sachs.org/userfiles/file/3362374654.pdfIn PDF document text
    • http://matchedtubes.de/userfiles/file/60303201312.pdfIn PDF document text
    • http://securitydirect.it/wp-content/plugins/super-forms/uploads/php/files/d0e3bad9ce96d93c9dc20695c7d4be34/77294963458.pdfIn PDF document text
    • http://stroynerud-sm.ru/wp-content/plugins/formcraft/file-upload/server/content/files/161118d4498b0a---gejilopimerajew.pdfIn PDF document text
    • http://uleshuzatshop.hu/files/file/24629056055.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fa40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA40 18308 bytes
SHA-256: 588ed2bf9791ee3295d6c29858c77d4e9bf76f81031e1884b69f1534fac96563
font_01_sfnt_off0001286c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1286C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001407d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1407D 16580 bytes
SHA-256: abc65e04fb9327791f49b63e92fecc1b9ccac213b8dde38f941cd1690f547826
font_03_sfnt_off00015718.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15718 11216 bytes
SHA-256: 95d9f548ac337b9d7a0b923190a551be37509e583b9e343daa87d37666bd4353

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