Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc02ec82532c4715…

MALICIOUS

PDF

77.1 KB Created: 2021-09-16 09:23:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 942f49a2f118e9ec55b8750eb9eb6d8a SHA-1: 5bde95f76558bb662e388935f7c72ba49f644dec SHA-256: cc02ec82532c4715504ad6ed2fc0f907ffcffa7142649a8efdd989b0d74280eb
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was identified as malicious by a machine learning classifier and ClamAV. It functions as a link farm, containing numerous URLs that point to compromised WordPress upload directories and disposable hosting. These links likely lead to further malicious content or phishing pages, indicating a phishing or credential harvesting attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9901

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://cheesykeju.com/contents/files/fetiruver.pdf In PDF document text
    • https://celovechurch.org/wp-content/plugins/super-forms/uploads/php/files/f8698b22dfc4dc5d5270da53dfc1d2bf/rijewewu.pdfIn PDF document text
    • https://www.kiteschule-kiel.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613bea1226e5f---dorojibazuzapovatevoveve.pdfIn PDF document text
    • http://rcp-ranstadt.us/files/pavekurewasurekepi.pdfIn PDF document text
    • http://mousike.it/img_ins/files/45983193342.pdfIn PDF document text
    • https://yantrasearch.com/ckfinder/userfiles/files/xibakagodaliperowo.pdfIn PDF document text
    • http://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/161315053ddc7f---79397590165.pdfIn PDF document text
    • http://evopizza.lt/ckfinder/userfiles/files/rugijejasimik.pdfIn PDF document text
    • http://cariboohose.com/userfiles/file/90171982588.pdfIn PDF document text
    • https://fotobolfestmeny.hu/mvc/userfiles/file/17142714297.pdfIn PDF document text
    • http://thanhtindesign.vn/uploads/image/files/19391593806.pdfIn PDF document text
    • https://ph2020.org/ckfinder/userfiles/files/bapoduzobitusibogipa.pdfIn PDF document text
    • https://smartech.lv/sites/smartech/uploads/documents/files/84858823866.pdfIn PDF document text
    • http://baloneacessorios.com/_upload/file///80998225055.pdfIn PDF document text
    • https://didaktika.drmix.cz/uploads/files/13734361404.pdfIn PDF document text
    • http://www.mediacomriccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/161410d69d886b---xapolebub.pdfIn PDF document text
    • http://veraschwemmle.de/fckdata/file/96970905038.pdfIn PDF document text
    • http://www.perchegouet.com/ckfinder/userfiles/files/7142801180.pdfIn PDF document text
    • https://madeinstlucia.com/userfiles/files/15115690389.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/161406c5822fbe---42319867245.pdfIn PDF document text
    • http://recamonde.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613536fbf3de9---36586435495.pdfIn PDF document text
    • https://austarpharma.com/upload/files/pukefumixawekulolowab.pdfIn PDF document text
    • https://subded.org/userfiles/file/buzonifurapavimin.pdfIn PDF document text
    • https://zbmbudomont.pl/userfiles/file/81690978917.pdfIn PDF document text
    • http://gammatradings.com/userfiles/file/wolobigevaw.pdfIn PDF document text
    • http://fc-junajted.com/upload/datoteke/58690549937.pdfIn PDF document text
    • http://gomsuhoangminh.com/app/webroot/uploads/files/wegejugevesokuwewijuloz.pdfIn PDF document text
    • http://a1-automotivegroup.com/upload/files/sanumusofakowaguxuv.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=fake+gps+without+mock+locationPDF link annotation
    • 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_off0000c32c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC32C 19292 bytes
SHA-256: 21e28b05edec1614edbceb288e01ff037204906e48d137156cc6d8f79f07f5c1
font_01_sfnt_off0000f4d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4D1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010ce8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CE8 10976 bytes
SHA-256: 7de2a94f08c6fd729217628375a0778efbf6a23d9b1db43c827238dbe1b5084d

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