Malicious PDF — malware analysis report

Static analysis result for SHA-256 06c1f1b03783344a…

MALICIOUS

PDF

83.9 KB Created: 2021-09-12 08:28:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: 13ae74bdc5823ac3f42b4a5890adbbff SHA-1: 7e4df696ad96ecf6506fa6c611918224b97a2e4a SHA-256: 06c1f1b03783344ac388d3f840abe40b727e068c3f0177e34d75e2d3b70b5d88
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is a common technique for exploiting vulnerabilities or redirecting users. The presence of numerous external URIs, many pointing to potentially compromised or disposable domains, strongly suggests a phishing or malware distribution campaign. ClamAV and ML classifiers also flagged this PDF as malicious, indicating a high likelihood of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://frangarcia.eu/upload/file/sororasejawilaledaduj.pdf In PDF document text
    • http://orourkelawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/51380690178.pdfIn PDF document text
    • http://ammk.sk/userfiles/file/sojikodewuverilaxejo.pdfIn PDF document text
    • http://hyunshin.net/userfiles/file/20972980613.pdfIn PDF document text
    • http://forma8.kz/ckfinder/userfiles/files/97434193960.pdfIn PDF document text
    • http://aleshashop.net/uploaded_files/userfiles/files/63250899314.pdfIn PDF document text
    • http://beamstraffic.ae/amb/userfiles/file/89224905849.pdfIn PDF document text
    • http://maility.pl/_ADRESuserfiles/file/ruwogezogorij.pdfIn PDF document text
    • http://congtyvima.com/images/Download/50928386852.pdfIn PDF document text
    • https://zemtechnika.lt/public/site/0files/bekikimaniziwefabi.pdfIn PDF document text
    • http://1yunnan.com/ckfinder/userfiles/files/38312316676.pdfIn PDF document text
    • https://semangkamerah.com/contents/files/teranukezosodefogu.pdfIn PDF document text
    • http://cyklo-sport-servis.cz/UserFiles/File/18440991718.pdfIn PDF document text
    • http://france-ex.com/images/blog/file/voveriguviferepajoxugimo.pdfIn PDF document text
    • https://ikitellirezistans.com/upload/files/61629372211.pdfIn PDF document text
    • http://all-vehicle.net/js/upload/files/surapozotatini.pdfIn PDF document text
    • http://corising.info/sa_upload/userfiles/file/20210911135325.pdfIn PDF document text
    • https://kaptenhoki.org/contents/files/temagawajiwisiruwozanobe.pdfIn PDF document text
    • https://shiprapublication.com/uniformkontakt/userfiles/image/files/21020728293.pdfIn PDF document text
    • http://fixmyhelicopter.com/project-new/christianbook/upload_images/file/23236729739.pdfIn PDF document text
    • https://medgal.pl/admin/ckfinder/userfiles/files/35308760464.pdfIn PDF document text
    • http://vyveva.eu/UserFiles/File/89123252608.pdfIn PDF document text
    • https://gelblighting.com/userfiles/files/81078023791.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=hosea+bible+study+questions+answers+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_off0000e077.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE077 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f889.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF889 18444 bytes
SHA-256: d2f56d32bf64eaca4f749ff032cbb6058d2166770bee5bd6e120acce45bb4562
font_02_sfnt_off0001280e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1280E 11068 bytes
SHA-256: 781028d273ef41e897bf2b615f66220fe84a35fb0d48b0db63505c093a174785

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