Malicious PDF — malware analysis report

Static analysis result for SHA-256 dacc7e680a06a80c…

MALICIOUS

PDF

86.9 KB Created: 2021-09-13 10:49:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: c02cd5cd568589f926d07253123b20c0 SHA-1: 4a8fa7fbb55e12bc1f212d9ecd31d4e22054a0a8 SHA-256: dacc7e680a06a80cc3fd7203118188be24a3bfa888dcf35167f66a5419a18ea0
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to PDF files on various domains, suggesting a link farm or redirection scheme. The 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic and the high number of distinct hosts indicate a malicious intent to distribute content or phish users. ClamAV also detected this file as 'Pdf.Phishing.Trojan'. No scripts were extracted, limiting the analysis of direct execution capabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://honda-vo.com/upload/file/baxatepit.pdf In PDF document text
    • https://mavismanagement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613acf8930a81---nigakirafe.pdfIn PDF document text
    • https://paron-rebondir.com/uploads/files/ratawukelulorom.pdfIn PDF document text
    • http://mgtofubbq.com/uploads/files/texusuruwogulatuviniji.pdfIn PDF document text
    • https://corcreation.twbiz.me/data/fckeditor/files/20210907_235129.pdfIn PDF document text
    • https://okinawa4d.com/contents/files/35812880877.pdfIn PDF document text
    • http://khodahoanglang.com/admin/webroot/upload/image/files/80459205159.pdfIn PDF document text
    • http://www.ondebiz.com/userfiles/file/pevipurawasakugofowoz.pdfIn PDF document text
    • http://fotografoenricogiampieri.it/userfiles/files/96364769435.pdfIn PDF document text
    • https://unibel.pl/pliki/upload/file/vupaxisaj.pdfIn PDF document text
    • http://mvdeastudio.it/userfiles/files/89245415409.pdfIn PDF document text
    • https://accidentmatters.com/ckfinder/userfiles/files/finurazozibi.pdfIn PDF document text
    • https://samirkumarpaul.com/ckfinder/userfiles/files/fawalegafuxirobabotajotiw.pdfIn PDF document text
    • https://cordovajewelry.com/images/file/fososutekonilewavit.pdfIn PDF document text
    • https://divetechmarine.com/contents/files/34962731553.pdfIn PDF document text
    • http://testsitehq.com/ckeditor-ckfinder-integration/uploads/files/77642283944.pdfIn PDF document text
    • http://shtaket46.ru/page_edit/_samples/userfiles/files/dunazegugeredibepide.pdfIn PDF document text
    • http://cancunday.com/travela/img/files/zaboxo.pdfIn PDF document text
    • http://bertrandetgastineaudesigners.fr/userfiles/file/42144772240.pdfIn PDF document text
    • https://bdata.vn/upload/files/kunonip.pdfIn PDF document text
    • http://frickcontrols.com/uploads/files/74636447026.pdfIn PDF document text
    • http://ez-surveying.com/htdocs/cljr/data/files/39431794419.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=shadow+fight+2+all+magic+mod+apkPDF 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_off0000ece6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECE6 10936 bytes
SHA-256: 3de1e8608c0088c29f083dbbdeecf0840c1bfcc8c5d2ca4e76de74caf89b9258
font_01_sfnt_off0001062a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1062A 18496 bytes
SHA-256: 2d12f25bd936e5196f45d227e0d0273e17207f9eb43f52d74a2bfaf8ec97430e
font_02_sfnt_off0001363a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1363A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1