Malicious PDF — malware analysis report

Static analysis result for SHA-256 a30519f36109189d…

MALICIOUS

PDF

78.9 KB Created: 2021-09-17 16:16:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: a4c23fbe47a961ab6ea92d3733c3a436 SHA-1: 25f1fb9ce428e9e91c47c900ff34e1d1cce90115 SHA-256: a30519f36109189d26e4b31ba19a971fee98e29d980b551b6d9e2626ccc06daa
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external links, many pointing to compromised websites or disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or delivering a secondary payload via the embedded scripts and URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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://queure.ru/uplcv?utm_term=love+2016+torrent PDF link annotation
    • https://drrajanmahtani.com/userfiles/files/bujijevesa.pdfIn PDF document text
    • http://accessibilite-salle-eau.com/ckfinder/userfiles/files/sonumiwizakexuz.pdfIn PDF document text
    • http://fra2ange.it/userfiles/files/9672678278.pdfIn PDF document text
    • http://stefani.cz/fck/file/labilizatikidabuwudadosup.pdfIn PDF document text
    • http://ranczowdolinie.com/files/53264807120.pdfIn PDF document text
    • http://aow.infogestnet.it/ckfinder/userfiles/files/76993416935.pdfIn PDF document text
    • http://baocaosuhoatoc.com/luutru/files/23740300460.pdfIn PDF document text
    • https://mudraconsultancy.com/uploads/files/82959958053.pdfIn PDF document text
    • http://songdolandmarkcity.com/userfiles/file/3114488567.pdfIn PDF document text
    • https://portsidestrategies.com/wp-content/plugins/super-forms/uploads/php/files/a53c3b6981c24f84264bd46e5e0d4960/39028176749.pdfIn PDF document text
    • http://yucehukuk.com/resimler/files/62137763163.pdfIn PDF document text
    • http://tpt.taipei/asset/uploads/files/72923252094.pdfIn PDF document text
    • http://otpetye.com/images/shared/file/86378281340.pdfIn PDF document text
    • https://www.artikel238.nl/emmwebbit/resources/ckfinder/userfiles/files/bogegegiduzizeduzizo.pdfIn PDF document text
    • http://www.lircai.com/web/inline/file/716219096.pdfIn PDF document text
    • https://sunarchegypt.com/userfiles/file/lovodegojiz.pdfIn PDF document text
    • http://cn-junsheng.com/upload/file///202195121023877.pdfIn PDF document text
    • https://cradlegold.com/wp-content/plugins/super-forms/uploads/php/files/ir2mncojh3549bm9esmactub9h/39060703666.pdfIn PDF document text
    • http://kientrucqhouse.com/uploads/image/files/15753833462.pdfIn PDF document text
    • http://santiagoporter.com/js/ckfinder/core/connector/php/files/95997672508.pdfIn PDF document text
    • https://ashasuchikala.com/ckfinder/userfiles/files/23709612579.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614134b9c0d52---xanukasakarav.pdfIn PDF document text
    • https://unitytradefze.com/ckfinder/userfiles/files/1714054788.pdfIn PDF document text
    • https://goo.gl/1ps4nBIn 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_off0000cb0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB0B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e31d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE31D 19972 bytes
SHA-256: 76813852f89a587c865be70b536d6ef2561e3ff00a4536e202e2ea02bffdb432
font_02_sfnt_off00011779.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11779 10116 bytes
SHA-256: 697408df7196c873d977c531c0b709d97ae11bdb8aecdb7d24e48086591ed4fa