Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee6d0a5921c760fa…

MALICIOUS

PDF

76.4 KB Created: 2021-09-16 18:50:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 43e924728b7929ce3610382de5d73cc9 SHA-1: 05bdfc5e1f574af52878eac646709d3e2c95c1d1 SHA-256: ee6d0a5921c760fa64aa2ddcb285fba6697859b5c439f0826f3a843f3678b56c
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by a machine learning classifier and ClamAV. It contains numerous links pointing to compromised WordPress sites and other disposable hosting, suggesting a phishing or malware distribution campaign. The presence of external URIs and link farms indicates an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://archism.ru/uplcv?utm_term=jungle+cruise+blu+ray+release+date PDF link annotation
    • http://www.kevinbrooks.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1613788ba10a19---watagagurul.pdfIn PDF document text
    • http://trevelci.ru/ckfinder/userfiles/files/4847242808.pdfIn PDF document text
    • https://areshin.ru/wp-content/plugins/super-forms/uploads/php/files/edaae4502786b5d72001055955044f3a/zikaxiruniligo.pdfIn PDF document text
    • https://hyosungulf.com/uploads/file/sigepogu.pdfIn PDF document text
    • http://studiolaviano.it/userfiles/files/molataxumolodegewaroxo.pdfIn PDF document text
    • http://www.mamafoundation.cz/ckfinder/userfiles/files/wopofo.pdfIn PDF document text
    • http://melissajacksonmd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613f3f0d68829---24560386065.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/in38pdkgnqvk96vtps5a6cieaf/97503214634.pdfIn PDF document text
    • https://agribusiness.pk/wp-content/plugins/formcraft/file-upload/server/content/files/1613c0bf9dbee0---kanidanekozanapop.pdfIn PDF document text
    • http://nuovartea.eu/userfiles/files/puxuderipolazeti.pdfIn PDF document text
    • http://bsp-oblspl.org/ckfinder/userfiles/files/23024334754.pdfIn PDF document text
    • http://smsgurugram.com/miet/assets/files/tetewanogalaninaziw.pdfIn PDF document text
    • https://szallas-karpatalja.com/upload/femagakifed.pdfIn PDF document text
    • https://quizai.com/uploads/files/63060730928.pdfIn PDF document text
    • https://xn--80aaa1anac6cg.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/3b830ebeac29b3508db92840c8b48274/90386556045.pdfIn PDF document text
    • https://thisissati.com/userfiles/files/moretobagudemarezavexebop.pdfIn PDF document text
    • http://hoadon-dientu.net/images/files/rofasesufufegu.pdfIn PDF document text
    • http://recko.ru/ckfinder/userfiles/files/44220672363.pdfIn PDF document text
    • http://kingspec.su/wp-content/plugins/super-forms/uploads/php/files/os3okhjhp7mmibjccb5h66n5rr/kokuwusazosozudoxud.pdfIn PDF document text
    • http://lagunarent.lt/ckfinder/userfiles/files/muburapox.pdfIn PDF document text
    • https://securitydm.net/slicice/file/girebujonubowozopawe.pdfIn PDF document text
    • http://jamoncup.es/wp-content/plugins/formcraft/file-upload/server/content/files/16140dcdee54fe---3119113974.pdfIn PDF document text
    • http://softwaretesting.kr/club/data/userfiles/file/20210904203643.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_off0000c4d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4D3 18096 bytes
SHA-256: 7a09da8b904864c791b23791be3a5601381896e3e2e36074d59f3e675453523a
font_01_sfnt_off0000f338.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF338 10768 bytes
SHA-256: 611b600538f8096f820dcd11654c6c50330e947440c9dd2fa6b73b9b4559bee1
font_02_sfnt_off00010bf8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BF8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1