Malicious PDF — malware analysis report

Static analysis result for SHA-256 c078e0fc670a6b52…

MALICIOUS

PDF

76.9 KB Created: 2021-09-17 06:58:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 5e41c564dd8f4f9c22990095156a5285 SHA-1: 1e839eaee8c19a6a592e317e4b50fbdebf4754b5 SHA-256: c078e0fc670a6b52f5ee0b28832c8616fdddde38696e1f7c471991be0a8c119d
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is a common technique for executing malicious code within documents. It also features a link farm pointing to compromised CMS upload storage and disposable hosting, suggesting an attempt to obscure the final malicious destination. The ClamAV detection and ML classifier further confirm its malicious nature, likely as a phishing or malware delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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://smidgel.ru/uplcv?utm_term=amep+volunteer+tutor+resources PDF link annotation
    • https://degardo.hollandpazsit.hu/ckfinder/userfiles/files/93011013187.pdfIn PDF document text
    • http://www.css-jp.com/upfile/files/2021/09/16/letosozevelekoje.pdfIn PDF document text
    • http://ktcz.eu/files/files/risaxelapawewofewolulogo.pdfIn PDF document text
    • http://mabo-meccanica.eu/userfiles/files/fegelamesawimagupirodi.pdfIn PDF document text
    • https://sealordhotels.com/ckfinder/userfiles/files/43773682852.pdfIn PDF document text
    • https://chupwo.com/editor_upload/file/pegodin.pdfIn PDF document text
    • https://mimpishio.com/contents/files/gegilolibilojom.pdfIn PDF document text
    • https://angkaganjil.com/contents/files/48021084179.pdfIn PDF document text
    • http://www.next-conseil.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1613a86e86f87c---xabarutiwilizimonelis.pdfIn PDF document text
    • http://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16137ce086657c---losanowerokoxozalidu.pdfIn PDF document text
    • http://j-club.eu/userfiles/file/42594987142.pdfIn PDF document text
    • https://hinaweb.com/upload/file/jalojodarexuf.pdfIn PDF document text
    • http://www.mananthavadynorbertines.org/www/js/ckfinder/userfiles/files/wazujunafawuwujizezazu.pdfIn PDF document text
    • http://www.mueblesgamez.com/ckfinder/userfiles/files/favevodelujid.pdfIn PDF document text
    • http://khonggianmang.com/upload/files/80704128968.pdfIn PDF document text
    • http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/16142a4d0d1c43---82772182499.pdfIn PDF document text
    • http://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/16131fae8c7d04---gufaxomeganikafokoviwuwot.pdfIn PDF document text
    • http://szkolaprywatnaleszno.pl/userfiles/file/84951617716.pdfIn PDF document text
    • http://wonsakai.com/uploads/files/47527191644.pdfIn PDF document text
    • https://frennphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614175b4d7762---wekixofudonatigina.pdfIn PDF document text
    • https://actionsporting.com/userfiles/files/zaxivizifonobikul.pdfIn PDF document text
    • http://tinavaron.com/ckfinder/userfiles/files/74673265360.pdfIn PDF document text
    • http://bugaboo-buffalo.eu/UserFiles/File/kedofumipuxilizepab.pdfIn PDF document text
    • http://braciszewska-klimek.pl/fck_files/file/94750947499.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_off0000c982.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC982 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e199.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE199 10428 bytes
SHA-256: a0f5ce071fb868f1cbe421292efb5518ebb76e9f11c4d4641b52760c78b0d2a4
font_02_sfnt_off0000f948.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF948 17468 bytes
SHA-256: 85d1eb3427f1a7e53b8f9daab60cad352413998b01fbca1656ff3c38eb99e030

Open this report in the interactive analyzer, or submit your own file for analysis.