Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1fe8aa44b0f6a6f…

MALICIOUS

PDF

78.4 KB Created: 2021-09-18 07:21:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 5039b77763d8cdd1dbcec305b0c95f05 SHA-1: 3f05a7cd9fe279687e71dde6700661ab803c5143 SHA-256: e1fe8aa44b0f6a6f7221b5a84a8d1beae5fc855cce510c974fff522628336ab8
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a large number of embedded URLs, many of which point to potentially malicious domains, suggesting an attempt to redirect users to phishing or malware-hosting sites. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic further indicates a link farm strategy, reinforcing the phishing or distribution vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9958

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://pension-erlkoenig.de/img/editor/file/xaduk.pdf In PDF document text
    • http://wakingbeauty.com/wp-content/plugins/formcraft/file-upload/server/content/files/161338e7534e6a---fosatowamewomavenotit.pdfIn PDF document text
    • http://michelschuurmans.nl/images/uploads/file/suxapidebupa.pdfIn PDF document text
    • http://matchedtubes.de/userfiles/file/xekosubezole.pdfIn PDF document text
    • http://sashtraayurveda.com/ckfinder/userfiles/files/kokibe.pdfIn PDF document text
    • http://iuf.kr/pds_down/files/20788196402.pdfIn PDF document text
    • http://intertribo.sk/files/padoriroradis.pdfIn PDF document text
    • http://holmeslawfirm-iowa.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/pupowilepojuvi.pdfIn PDF document text
    • http://4yoga.by/pics/files/32287237410.pdfIn PDF document text
    • http://doktor-okonski.pl/uploadimg/file/xerosupebopin.pdfIn PDF document text
    • http://miyagi.chi-kara.net/Upload/files/35284921065.pdfIn PDF document text
    • https://vidaleve.net/ckfinder/userfiles/files/wedebevawotitiz.pdfIn PDF document text
    • http://lambanghieuquangcaogiare.net/vietkiendo/upload/file/51658255636.pdfIn PDF document text
    • https://lienlacanien.com/img_pages/file/lorega.pdfIn PDF document text
    • http://canvangdientu.com/images/file/dojapowisoxuwanuxawekak.pdfIn PDF document text
    • https://drmiamiconnect.com/wp-content/plugins/super-forms/uploads/php/files/f9ea2091e89c3ea435c15bb9ef25e4b6/76988549450.pdfIn PDF document text
    • https://maintogelonline2.org/contents/files/goretaso.pdfIn PDF document text
    • http://adhdesign.de/userContent/files/20210907093754-govelewebumo.pdfIn PDF document text
    • https://lwim-ouargla.dz/ar/files/45704339432.pdfIn PDF document text
    • https://europacreativaeuskadi.eu/files/galeria/files/sokir.pdfIn PDF document text
    • https://ekransamara.ru/files/61079340135.pdfIn PDF document text
    • http://4bx.pl/public/file/wuforiliwiwudoj.pdfIn PDF document text
    • https://natinsel.com/imagenes/file/wapusisurosod.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=iphone+se+2020+not+receiving+textsPDF 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_off0000ce43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE43 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e65a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE65A 10808 bytes
SHA-256: e8465ad65faec76aaf1979e8b57a8cd843822d9e70b917dfce7e1ceee5281178
font_02_sfnt_off0000ff4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF4E 17592 bytes
SHA-256: 20be74e63a21a2d8a39f9f56390f728ce06bff56df8da2186acece6e26f54431

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