Malicious PDF — malware analysis report

Static analysis result for SHA-256 0048e2bf667a6de6…

MALICIOUS

PDF

84.0 KB Created: 2021-09-08 12:16:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 210311b602dc73f5ed5eaf7af9f2d7ca SHA-1: 040a70001358aa41686fc4d6b6e1bd340efbb3dd SHA-256: 0048e2bf667a6de6e6bf6a10a7e29f1be446cd07c4287b357997adfd20475b61
126 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, with one heuristic identifying it as a link farm on disposable hosting. While no scripts were directly extracted, the PDF structure and embedded URLs suggest an attempt to redirect the user to malicious content, potentially for phishing or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://draftingfloorplan.com/ckfinder/userfiles/files/fiteguvaxod.pdf In PDF document text
    • http://manuale.aziendasulweb.it/userfiles/files/begibazo.pdfIn PDF document text
    • http://zae.me/datafiles/file/xuwowotirizu.pdfIn PDF document text
    • https://esprimagroup.com/userfiles/file/79978861773.pdfIn PDF document text
    • http://area100impianti.it/userfiles/files/vivixixojizulowitokogiku.pdfIn PDF document text
    • http://sllight.ru/design/img/upload/file/tifuwoninif.pdfIn PDF document text
    • http://www.videobezopasnost.ru/ckfinder/userfiles/files/7367004760.pdfIn PDF document text
    • http://reklama-v-sochi.com/ckfinder/userfiles/files/popobufozawixutoz.pdfIn PDF document text
    • https://protrialse.eu/files/files/bizotaxowafuwikug.pdfIn PDF document text
    • http://lsbwg.com/ckfinder/userfiles/files/20210901/0609581417.pdfIn PDF document text
    • https://perfecthospital.org/ckfinder/userfiles/files/jovoxaboxo.pdfIn PDF document text
    • http://kindervakantieweekdeurne.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16131706cc80ba---tulirubidufaratafap.pdfIn PDF document text
    • https://85097781.com/upload/files/wowutofukedop.pdfIn PDF document text
    • https://thietbivesinhanhhuy.com/asset/files/mawisetuva.pdfIn PDF document text
    • http://problemconsulting.com/img/download/files/datize.pdfIn PDF document text
    • https://miamivanservice.net/wp-content/plugins/formcraft/file-upload/server/content/files/1612ee08c637a0---41185020778.pdfIn PDF document text
    • https://cochleartudaskozpont.hu/files/nobatazum.pdfIn PDF document text
    • http://ctm.it/userfiles/file/9684128895.pdfIn PDF document text
    • http://kursadowicz.pl/Upload/file/80732341568.pdfIn PDF document text
    • https://cortemadera.com/wysiwygfiles/file/zovabeves.pdfIn PDF document text
    • http://enewind.com/pliki/file/49513252685.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=fundamentals+of+business+process+management+second+edition+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_off0000e3a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3A6 17264 bytes
SHA-256: 5d7313059bdfa8b153b3d79bc677314102fc95ca4e88940c04e58306f57f7bcc
font_01_sfnt_off00010ffa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FFA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012811.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12811 11180 bytes
SHA-256: 60bd53d3b48bb6e9eb9f8f2cd2a65d9525416f30468ab5148da86b145bac86b8