Malicious PDF — malware analysis report

Static analysis result for SHA-256 6061b1252b45c210…

MALICIOUS

PDF

82.3 KB Created: 2021-09-03 05:35:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 52334f3d7512dfc65b4e633f4620f1f0 SHA-1: f9006ae3be521053a51d429119d027a04600662e SHA-256: 6061b1252b45c2109904e1bbc90319d21ff774aed49cd480fb87f38ef01ed29e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The numerous embedded URLs point to compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content, likely for phishing or malware distribution. The file's structure and URL patterns are consistent with a phishing lure, potentially masquerading as a job description or similar document to entice clicks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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://philabc.ru/uplcv?utm_term=senior+accountant+job+description+pdf PDF link annotation
    • https://webmodels.studio/wp-content/plugins/formcraft/file-upload/server/content/files/160a578223d2f2---surunibegupapedepe.pdfIn PDF document text
    • http://www.inhd.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160877c33d61de---18532773818.pdfIn PDF document text
    • https://lawyerupsmart.com/tempimg/file/33929350470.pdfIn PDF document text
    • https://akanaymatbaa.com/calisma2/files/uploads/11748862534.pdfIn PDF document text
    • http://coreaad.com/DreamDataUpload/file/togoguxetoled.pdfIn PDF document text
    • https://hightechrustremovers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608487309ada1---dinaripuvugemidi.pdfIn PDF document text
    • https://apinero.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b8fb365f44---85013283543.pdfIn PDF document text
    • http://www.hypnotiseur.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075b813431ba---dodupejemukofipofax.pdfIn PDF document text
    • https://majorsagilekvaros.hu/uploads/file/29154609490.pdfIn PDF document text
    • http://www.etoiles-recrutement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609781a122f15---gawojete.pdfIn PDF document text
    • http://contrast.no/ckfinder/userfiles/files/kavigitajujosiwa.pdfIn PDF document text
    • http://tsradviseurs.nl/mailing/images/photo/file/62406010798.pdfIn PDF document text
    • http://vieclamquantri.net/upload/files/17069190731.pdfIn PDF document text
    • http://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ec9b493cae6---17180682676.pdfIn PDF document text
    • http://thesciencenetwork.org/uploads/files/kumuxirikitevunabanexet.pdfIn PDF document text
    • http://nc2e.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1608024c8dbf4b---92885822600.pdfIn PDF document text
    • https://www.isnb.co.uk/wp-content/plugins/super-forms/uploads/php/files/8c8e9b815ae150d0fcea75b0675bb342/38129030412.pdfIn PDF document text
    • https://www.lang-mayer.de/wp-content/plugins/formcraft/file-upload/server/content/files/160fc047033d7f---7038508991.pdfIn PDF document text
    • http://yonezawanet.jp/units/24250/zcycom/files/11147156854.pdfIn PDF document text
    • http://xn--b1afklwjc5g.xn--p1ai/ckfinder/userfiles/files/2447216496.pdfIn PDF document text
    • http://livelyway.com/ckfinder/userfiles/files/35188826665.pdfIn PDF document text
    • https://www.champagne-auge-dascier.com/ckfinder/userfiles/files/benobunora.pdfIn PDF document text
    • http://www.ccengis.be/applications/ckeditor/addons/ckeditor/ckfinder/userfiles//files/katelawavuxurenef.pdfIn PDF document text
    • http://promador.pl/userfiles/file/tifepavewatenewo.pdfIn PDF document text
    • http://aldo-ins.com/userfiles/file/755230542.pdfIn PDF document text
    • http://pro.ovh.net/~tribuene/images/banque/file/xuvibavaxolomibiwubomatef.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_off0000dc42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC42 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f459.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF459 11012 bytes
SHA-256: 0adadb7b82867979a86859952d30c0e3fc56344b2a79e5224a85f4f7bbce14d1
font_02_sfnt_off00010dd5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DD5 17584 bytes
SHA-256: abcbf52ccb7888ac723ac0e2e4aea3bf37380a2b93585f40840dccaa5ac1b8bf

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