Malicious PDF — malware analysis report

Static analysis result for SHA-256 d208eddd2e6a0ead…

MALICIOUS

PDF

83.5 KB Created: 2021-08-30 15:30:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: b638b6c0eabd03d975710898dd4aa9fb SHA-1: 49d3d56a8a126d80ac660b63ca6c46bc71120f64 SHA-256: d208eddd2e6a0ead295ec75888149e3918cd8e4dfa04d93ff7d98084d60e330d
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which are hosted on compromised WordPress sites or disposable domains, indicating a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware delivery. The embedded JavaScript is likely used to facilitate the redirection or exploit vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://huntic.ru/uplcv?utm_term=wound+dehiscence+infection PDF link annotation
    • http://pattarasawat.com/ckfinder/userfiles/files/parupurudovurapo.pdfIn PDF document text
    • https://qamarapps.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611ce4614f019---pukuzubujipigibudijuteb.pdfIn PDF document text
    • http://aquatherm-graz.at/files/59832808489.pdfIn PDF document text
    • http://aaaexpressheating.com/userfiles/file/jaxuvuf.pdfIn PDF document text
    • https://ncfouting.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d0eae01a35---96289841885.pdfIn PDF document text
    • http://ranaghatpchsschool.org/userfiles/file/89589008860.pdfIn PDF document text
    • http://hzeiger.com/userfiles/file/17167828419.pdfIn PDF document text
    • http://hoanggiaphatstone.com/upload/files/pororibuzofow.pdfIn PDF document text
    • http://conservationenergy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160edd9b455755---51272992998.pdfIn PDF document text
    • http://akkoryazilim.com/userfiles/file/41730422663.pdfIn PDF document text
    • https://t2sc.me/userfiles/resujediw.pdfIn PDF document text
    • http://soft-pro.hr/upload/datoteke/wupelamonororazuve.pdfIn PDF document text
    • http://albino-pitti.com/pub_img/file/savafedowowebu.pdfIn PDF document text
    • http://accapierre.it/userfiles/files/83773313616.pdfIn PDF document text
    • http://xedaphcm.com/luutru/files/72732735386.pdfIn PDF document text
    • https://petrovsky14.ru/docs/files/xejuferirabujareridefebef.pdfIn PDF document text
    • http://xn--b1ahhafccpgkb2bxo.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/c3463bd65c27a6894be682d0d58dc084/76741334755.pdfIn PDF document text
    • http://veiligheidssloten.nl/ckfinder/userfiles/files/14539715822.pdfIn PDF document text
    • http://www.itbaloch.com/wp-content/plugins/formcraft/file-upload/server/content/files/161200981408ce---93927098133.pdfIn PDF document text
    • https://brmc.jp/user_data/userfiles/files/repusoju.pdfIn PDF document text
    • http://csptech.net/admin/userfiles/file/50891885807.pdfIn PDF document text
    • https://akapacha.com/userfiles/file/zitil.pdfIn PDF document text
    • https://www.indoorclub-informa.com/boletines/img/file/ruxotufis.pdfIn PDF document text
    • https://bankkartya.hu/js/ckfinder/userfiles/files/jepidafameguwobixugovop.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_off0000e228.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE228 10360 bytes
SHA-256: dbd594086eb2432feab5b274c1badd632ed24672c4578595b6c4ef2a9a19f91e
font_01_sfnt_off0000f985.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF985 17348 bytes
SHA-256: e968b1c5d6dabf2e15656d4f22b0d4fcb450191c27f0a2d2e65837ae36c6fdbd
font_02_sfnt_off0001274d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1274D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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