Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7014283c6bf6ce6…

MALICIOUS

PDF

69.4 KB Created: 2021-09-28 01:03:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 46d8262fac922463fbf62ac0bf4d8143 SHA-1: 2fc500b9287df1875839f66f4c9228ff2c003b96 SHA-256: b7014283c6bf6ce6c08bde37ceda6e95a672d100dabddfe92c4b4f15fd07f574
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs, many of which point to disposable domains or are structured as link farms, indicating a phishing or malware distribution attempt. ClamAV detection and ML classification strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a malicious lure, likely aiming to redirect users to malicious sites for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 https://marathonblainville.com/userfiles/files/welivitotapimabaderan.pdf In PDF document text
    • https://marupyara.com/fotos/userfiles/file/bakoferivutodivu.pdfIn PDF document text
    • http://www.temaricerca.com/entry2013new/admindia/ckfinder/userfiles/files/81226077538.pdfIn PDF document text
    • http://vtdsbinhthuan.vn/public/uploads/userfiles/file/dezopedukosanujis.pdfIn PDF document text
    • http://foire-fromages-et-vins.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132629106572---minifapomipewefibojoboke.pdfIn PDF document text
    • http://ekotop.eu/userfiles/file/zepuveru.pdfIn PDF document text
    • https://dimensioninteractive.com/WYSIWYGImage/file/81275622330.pdfIn PDF document text
    • http://hindustanadvancedsolution.com/t/tutorfirm/uploads/ck/files/gegazomidor.pdfIn PDF document text
    • http://boletos.luzservicos.com/ckfinder/userfiles/files/28651495160.pdfIn PDF document text
    • http://zhihepvb.com/upload/ckimg/files/202109011152066897.pdfIn PDF document text
    • https://kettosallampolgarsag.net/imagini_ws/jazenorazimov.pdfIn PDF document text
    • https://inchirieriavioane.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1613eebd7846a0---23089207534.pdfIn PDF document text
    • http://becskeicsodajo.hu/admin/fck_upload/file/gerimijiku.pdfIn PDF document text
    • https://actaviaserica.org/board/file/files/fugotawununawizegupi.pdfIn PDF document text
    • http://allier.proximeo.com/ckfinder/userfiles/files/kakuzuwiranezovapiri.pdfIn PDF document text
    • http://www.pranabkumar.com/fckimages/file/nipofero.pdfIn PDF document text
    • https://www.tunnel.de/files/uploaded/file/70776850330.pdfIn PDF document text
    • http://kolkandkolkdesign.com/site/data/ws/files/rokisuto.pdfIn PDF document text
    • http://delve-cr.com/uploads/12327008872.pdfIn PDF document text
    • http://zhongjiukeji.com/upload_fck/file/2021-9-21/20210921023458369029.pdfIn PDF document text
    • http://newworldss.com/uploads/file/wixuvafiwegizovezap.pdfIn PDF document text
    • http://debeleven.net/UserFiles/File/53092731196.pdfIn PDF document text
    • http://www.smartlandgroup.com/ckfinder/userfiles/files/wimugarazobiko.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=4k+movies+online+freePDF 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_off0000b00a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB00A 16400 bytes
SHA-256: 85d56178ad19cce0a0fc004c8281d0562796ff0ab510f1237110fbcd905033d9
font_01_sfnt_off0000d995.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD995 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f1ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1AC 10256 bytes
SHA-256: 507a511ba91f2152e5b52e7582c39c0b3b8a06f82731340a928606c532ed84b0