Malicious PDF — malware analysis report

Static analysis result for SHA-256 93ac2d1b1075ddc5…

MALICIOUS

PDF

81.8 KB Created: 2021-10-10 00:26:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 778a861967b5808f489a3a7cb1163f2e SHA-1: 7062f7815ee848d1e2384493c1cc5bf9382e3c28 SHA-256: 93ac2d1b1075ddc5d5db1deb609c35b0ed296295c282d667c87509eec7af45d0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains numerous links, many pointing to compromised CMS uploads and link farms, suggesting an attempt to redirect users to malicious websites. The presence of external URIs and the overall structure strongly suggest a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://infrive.ru/uplcv?utm_term=port+severn+to+barrie PDF link annotation
    • http://wamer.org/userfiles/file/wajozamapasivobenurabevot.pdfIn PDF document text
    • https://aprenda-atdi.com/uploads/files/wafesar.pdfIn PDF document text
    • http://760_709737661.mildmedia-dev.eu/uploads/userfiles/files/xexotekexovaduxerorilepe.pdfIn PDF document text
    • http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614e448ca4db6---49797263035.pdfIn PDF document text
    • https://santaclara.com/wysiwygfiles/file/nogafobifolu.pdfIn PDF document text
    • http://trungtinjsc.vn/upload/FCK/file/72495120268.pdfIn PDF document text
    • https://theshamrockpublecco.it/file/76760431306.pdfIn PDF document text
    • https://lrsdev.com/userfiles/file/94936136372.pdfIn PDF document text
    • https://10playsolutions.com/clients/softklk/documents/_articles_/file/39778258671.pdfIn PDF document text
    • http://fecoil.com/userfiles/file/9743907322.pdfIn PDF document text
    • https://www.mobytec.com.br/mobytec/wp-content/plugins/formcraft/file-upload/server/content/files/1613baec714610---12129997492.pdfIn PDF document text
    • https://aquariumfargo.com/wp-content/plugins/super-forms/uploads/php/files/ef55d99078b49cd7629bf3d07e62a014/figukajexuw.pdfIn PDF document text
    • http://mounceconstruction.com/userfiles/file/46627429670.pdfIn PDF document text
    • https://lionkingbali.com/uploads/file/34215204797.pdfIn PDF document text
    • http://aa-nusd.jp/kaduzixiradokupejekawiger.pdfIn PDF document text
    • http://paymentsbusiness.ca/wp-content/plugins/formcraft/file-upload/server/content/files/161571547bf3e7---67485874343.pdfIn PDF document text
    • http://ageddfjtjgrade.pretty-match.com/upload/files/rawijinixifa.pdfIn PDF document text
    • http://brmhn.com/userfiles/file/20210927141856_m7z4o6.pdfIn PDF document text
    • https://amesmedicalservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/161432e0667dfd---kiladadivufemexaz.pdfIn PDF document text
    • http://marcus-1.com/FileData/ckfinder/files/20210903_0CFB384C9BB4EABD.pdfIn PDF document text
    • http://c-six.it/userfiles/files/48607650179.pdfIn PDF document text
    • https://sv-fin.ru/wp-content/plugins/super-forms/uploads/php/files/2d5d4c94387d226f3508362c96d9af44/dezuxusirisubijusifabo.pdfIn PDF document text
    • http://fu-xin.tw/uploads/files/202109222018172536.pdfIn PDF document text
    • https://ghnservizi.com/file/fimepu.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_off0000d760.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD760 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ef72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF72 18908 bytes
SHA-256: 6ef4a2dc3bdaf1db2060abce32b5b366b13cedf6deaf45948a2a46f264b0eb5a
font_02_sfnt_off0001214f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1214F 10260 bytes
SHA-256: 2d91da3b648aca70c2258a13c2b31fbab6c743dc979ae1439ed8913cb6eed73e

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