Malicious PDF — malware analysis report

Static analysis result for SHA-256 96fa9c0f2a8cbacf…

MALICIOUS

PDF

90.1 KB Created: 2021-09-09 02:06:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: a0e3e4630e8dacdf890618fd645e38bf SHA-1: 1132ab36e56484f947c698727ccf78212e345d35 SHA-256: 96fa9c0f2a8cbacf36b1825a919a6294411ccdc8a94b5a4bc82ef3adbae44499
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous embedded URLs pointing to various websites, some of which are hosted on compromised CMS upload directories. The primary purpose appears to be directing users to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9923

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://uniondrygoods.com/fckeditor/userfiles/file/gizerovuzironozabokena.pdf In PDF document text
    • http://ministryofrum.com/memlogos/file/86998210285.pdfIn PDF document text
    • https://giga-tronics.com/userfiles/files/zolamubofidefuzunuba.pdfIn PDF document text
    • https://aep-tc.com/cache/fck_files/file/19134966879.pdfIn PDF document text
    • https://bilbox.es/wp-content/plugins/super-forms/uploads/php/files/bb7a8c73ab1d0acf0dc885d2c2cf4f3a/dopol.pdfIn PDF document text
    • http://smepil.com/ckeditor/userfiles/files/49387807000.pdfIn PDF document text
    • http://herborgthailand.com/file_media/file_image/file/23519673146.pdfIn PDF document text
    • https://k9-warrior.com/wp-content/plugins/super-forms/uploads/php/files/4q15jtoah6b7bpp16pk66sdn79/80377362082.pdfIn PDF document text
    • https://travellifeafrica.com/ci/userfiles/files/tukuripetanavuvake.pdfIn PDF document text
    • https://sakura-bashi.com/uploads/files/202109031725404563.pdfIn PDF document text
    • http://barrarioservicos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/161393f9c3c047---roxararisezisosinubezuwi.pdfIn PDF document text
    • http://burelomdo.com/ckfinder/userfiles/files/debiverawiduvidasefil.pdfIn PDF document text
    • http://websteravelandscaping.com/editorData/file/wanerinoloribubozizokavuv.pdfIn PDF document text
    • https://idfusionllc.com/wp-content/plugins/super-forms/uploads/php/files/53e4ceaaaca0b4cb3507ee90c217f7d2/fomoxadurogivo.pdfIn PDF document text
    • http://sozopolihills.com/userfiles/file/ginugizagama.pdfIn PDF document text
    • http://hotel-gerard-dalsace.com/upload/document/koxogojowomox.pdfIn PDF document text
    • http://csc0516.com/userfiles/file/20210906233429_tgs52s.pdfIn PDF document text
    • https://semsaesp.com/ckfinder/userfiles/files/narug.pdfIn PDF document text
    • https://kodcomputers.ro/2664/uploads/jazul.pdfIn PDF document text
    • https://www.sblending.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1612f7bcfc3c3f---97201072907.pdfIn PDF document text
    • http://cofetariafraguta.ro/UserFiles/file/8487398656.pdfIn PDF document text
    • http://xn----7sbndn5at.xn--p1ai/uploads/files/12397499296.pdfIn PDF document text
    • http://protech.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/16130297d4c06a---bidakukolo.pdfIn PDF document text
    • http://cerescommoditiesltd.com/Images_upload/files/genabet.pdfIn PDF document text
    • http://michael-dhom.com/webseiten/file/97188399336.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=josh+cohen+paranoid+androidPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d832.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD832 10460 bytes
SHA-256: c8d2276c85d04919d1de0852daf452401d0a9a046d7b53882175b2b392926aa8
font_01_sfnt_off0000efd5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFD5 19708 bytes
SHA-256: ee353144c2dec44e30c08b1a1bb92e73eb432955b4df55ca054bcf596214b905
font_02_sfnt_off000123e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123E1 18660 bytes
SHA-256: 5491c85adf327e9a4b994110783270bca7b8eae92bab9f2ec79cab09cd49f1be
font_03_sfnt_off00014214.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14214 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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