Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e697b4fc88d4959…

MALICIOUS

PDF

85.7 KB Created: 2021-09-06 23:09:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 073e8e70de317b897ac46fca776215b1 SHA-1: a27ba13b209f95fcf92f6f781bbbd11bff9d11bc SHA-256: 8e697b4fc88d495969528c7696893841dbbb2268d978b0175f234795c05b4eb5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many hosted on compromised WordPress sites, suggesting a link farm or phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URLs point towards an attempt to redirect users to potentially malicious content, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://catamma.ru/uplcv?utm_term=gamesir+t1d+manual+espa%C3%B1ol PDF link annotation
    • https://dungcuruamui.com/wp-content/plugins/super-forms/uploads/php/files/fp1r06dmuv0d34656un2o9ih5o/dakolifarulibunatelifoz.pdfIn PDF document text
    • https://adbetelparaguay.com/wp-content/plugins/super-forms/uploads/php/files/2746c98272d8d76f3bdb7cbbc8f48287/99922209648.pdfIn PDF document text
    • https://chetanaus.org/bheru/uploadfiles/file/vizozukikuzajuwolekoja.pdfIn PDF document text
    • https://floorco.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/c58a077b972e453c937a978a21066e92/20856781820.pdfIn PDF document text
    • http://zuche0551.com/upload/file/darivuke.pdfIn PDF document text
    • https://www.sadcmedia.com/wp-content/plugins/super-forms/uploads/php/files/lq7kf8he31oiak0ceegeag1rqg/kivofilomuvew.pdfIn PDF document text
    • http://focostrade.com/files/20210707092037.pdfIn PDF document text
    • https://clifestyle.net/uploades/userfiles/file/25376547447.pdfIn PDF document text
    • https://pyhm.ca/wp-content/plugins/super-forms/uploads/php/files/pk9dd8visk95joosoaofdlg676/22634534556.pdfIn PDF document text
    • http://arcadia1973reunion.com/clients/3/33/33cb7023d77084166ed027ca16b579b7/File/wubududedibom.pdfIn PDF document text
    • https://miamiuniquelimo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f260f4645bf---52365273499.pdfIn PDF document text
    • http://megalabsrl.it/userfiles/files/nejefosiwi.pdfIn PDF document text
    • http://parquessolaresdenavarra.com/userfiles/files/ketinulezagakuluripepus.pdfIn PDF document text
    • https://sluganarodu.org/userfiles/files/dufimazujufalosok.pdfIn PDF document text
    • http://ansing.nl/userfiles/file/61606425778.pdfIn PDF document text
    • https://stcatherine.ac.ug/wp-content/plugins/formcraft/file-upload/server/content/files/160895ee81a0cd---gebap.pdfIn PDF document text
    • https://adikkeempat.com/contents//files/fewitabavedikakitab.pdfIn PDF document text
    • https://comfort8889.com/upload/files/lotonefijerureripug.pdfIn PDF document text
    • https://stpetejazz.com/wp-content/plugins/super-forms/uploads/php/files/6njds36r18jjc7fcu8799mkns3/60058632704.pdfIn PDF document text
    • http://studiotecnicoprato.eu/userfiles/files/voliwomevezozixuxijivar.pdfIn PDF document text
    • http://cascinamana.it/userfiles/file/bazifiramiga.pdfIn PDF document text
    • http://ristorantebiscione.com/userfiles/files/79548206377.pdfIn PDF document text
    • https://iqmuseum.mn/uploads/files/guwuriloxo.pdfIn PDF document text
    • http://orosweb.hu/userfiles/file/98650314977.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_off0000e421.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE421 10952 bytes
SHA-256: 20d498ac18b788b037ae2b1e27df64b962d7ed008cb70c135519e1261268f926
font_01_sfnt_off0000fd48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD48 19320 bytes
SHA-256: b9b3a121c611fc2295cd94822279289e4fdb05c0a9a602311a604ffaf3f61067
font_02_sfnt_off00012fbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FBD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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