Malicious PDF — malware analysis report

Static analysis result for SHA-256 02d1ed3d6d05dfa1…

MALICIOUS

PDF

92.3 KB Created: 2021-09-04 14:03:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: a0b5d954e13618c0a947fdf94e7d4518 SHA-1: 0f7488d4958e0bc3265113e98fe6d8a77d56bdf1 SHA-256: 02d1ed3d6d05dfa1ddd8cec5c85b1d4ef3fabe289835bf0d4888958b1b51205c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. It contains a link farm with numerous URLs pointing to compromised WordPress sites, suggesting a phishing or malware distribution attempt. While no scripts were directly extracted, the presence of these links and the heuristic firings strongly indicate a malicious intent to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

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 http://www.risingstars.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1612be87962c9f---58056596809.pdf In PDF document text
    • http://istrouma1971.com/clients/9/9b/9b88b062b8d6af44b28e209fcb06d7d5/File/xuwutabubekomitexerunutor.pdfIn PDF document text
    • http://staging.impactredevelopment.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078a5c513502---93409597987.pdfIn PDF document text
    • http://tiwtactic.com/userfiles/files/64646654473.pdfIn PDF document text
    • http://mytmbc.org/fckimage/file/vidixisixisugefa.pdfIn PDF document text
    • http://szao-spb.ru/images/news/file/zotenedeja.pdfIn PDF document text
    • https://pavillonwohlen.ch/userfiles/files/58721445931.pdfIn PDF document text
    • http://xiaohecollege.com/d/files/7867678628.pdfIn PDF document text
    • http://nhhs78.org/clients/63854/File/59918971820.pdfIn PDF document text
    • https://ohligschlaeger-berger.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608abb4e38cdf---93651987023.pdfIn PDF document text
    • https://juraganmonyet.com/contents//files/finuziwezuxom.pdfIn PDF document text
    • http://cgt-fo-csc.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16077d078a0e63---42401899128.pdfIn PDF document text
    • https://leanuslab.com/UserFiles/file/1627101602.pdfIn PDF document text
    • https://fishboat.hr/files/xogirunirotedufilep.pdfIn PDF document text
    • http://busankid.com/webfiles/board/file///lejejemuzumogevubeboko.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/16079626de59e8---90813821603.pdfIn PDF document text
    • http://healingtown.org/userData/board/file/birowejadijoxi.pdfIn PDF document text
    • http://sushinamu.com/uploads/files/21601502204.pdfIn PDF document text
    • http://nanoservice.cz/upload/file/78782239067.pdfIn PDF document text
    • https://www.mercedesbenzofaustinservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608083792925d---funovomuwejiwijama.pdfIn PDF document text
    • https://cncostruzioni.com/userfiles/file/97138272211.pdfIn PDF document text
    • http://easyreturn.store/userfiles/file/10904437767.pdfIn PDF document text
    • https://juraganmonyet.com/contents//files/65166586382.pdfIn PDF document text
    • https://ceadersvalet.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090c9f09ed30---fetorasilekamirominitufi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=descargar+libro+quiubole+con+para+hombres+pdfPDF 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_off0000faec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAEC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000112fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112FE 21292 bytes
SHA-256: d703e9c0d379141b3dd376e8820b6573cd7c687180232547a1ca7d7287a29f41
font_02_sfnt_off000149d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x149D9 11356 bytes
SHA-256: a6de5ae408f75b841906fd65c55e6db3d4615429e8a08a69f2b648e8cf1fc939

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