Malicious PDF — malware analysis report

Static analysis result for SHA-256 494406a429b1d181…

MALICIOUS

PDF

83.9 KB Created: 2021-09-12 15:29:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: ec6860ad04956520e0b14c92b1f3b763 SHA-1: 3a17874a4187a71c75dd2b85e5a567f42b56bee3 SHA-256: 494406a429b1d181dbdd9aa6c6d0f2a35fd47a26e3eade6e7fa2c64f3168600a
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, exhibiting characteristics of a phishing and trojan distribution. It contains a high density of embedded URLs pointing to disposable domains, suggesting a link farm designed to redirect users to malicious content or downloads. No scripts were extracted, but the structure and URL patterns strongly indicate a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://aesg2edcv.handylover.com/upload/files/rikikerupimefipupa.pdf In PDF document text
    • http://dorapeyzaj.com/userfiles/file/59664124631.pdfIn PDF document text
    • https://democv.associasuite.com/imagenes/contenidos/files/vawomesaxawolumavikemur.pdfIn PDF document text
    • http://spadhotel.com/basefile/spadhotelcom/files/72567251694.pdfIn PDF document text
    • https://nedimgame.com/calisma2/files/uploads/rafogujefofalomiromefimed.pdfIn PDF document text
    • http://tuzoltosagmihald.hu/userfiles/file/xalimemepazimuto.pdfIn PDF document text
    • https://mercerapparelss.com/userfiles/files/bitulexekonavilonan.pdfIn PDF document text
    • https://cailux.lu/userfiles/files/16001390055.pdfIn PDF document text
    • https://pixel.bg/img/file/legiluvever.pdfIn PDF document text
    • http://dlzj.net/upload/files/20210905190742963914.pdfIn PDF document text
    • http://tindangnhadat.vn/upload/files/xezimorumomifo.pdfIn PDF document text
    • https://www.enviedecrire.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130c181d6a50---sabudobisunuseb.pdfIn PDF document text
    • https://indianhairtransplant.com/ckfinder/userfiles/files/newozurejerazolix.pdfIn PDF document text
    • http://livestocktool.com/d/files/gedod.pdfIn PDF document text
    • https://mariellatriolo.it/public/file/melobapuvixefodowiw.pdfIn PDF document text
    • http://usarsenal.it/userfiles/files/zafam.pdfIn PDF document text
    • https://tssch.in/tssch/application/admin/uploads/file/lufalazojejubenefusamebi.pdfIn PDF document text
    • https://yoimart.com/upload/file/20210908222334.pdfIn PDF document text
    • http://boxshop.mn/userfiles/files/nofevegasilasa.pdfIn PDF document text
    • https://hunglivet.com/uploads/files/202109041634146057.pdfIn PDF document text
    • https://mokshadhamnepal.org/userfiles/files/76196561246.pdfIn PDF document text
    • https://dichvuhappyhouse.com/upload/files/fopuwepisa.pdfIn PDF document text
    • http://mzch.pl/userfiles/file/96243613960.pdfIn PDF document text
    • http://himalayakebab.irafbrothers.com/shipinc/userfiles/files/14629632944.pdfIn PDF document text
    • http://mega-stainlesssteel.com/uploads/image/files/10433440551.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=why+my+phone+is+slowing+downPDF 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_off0000e497.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE497 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fca9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCA9 17360 bytes
SHA-256: b08489e2e3bb04d899bd83c219b9bde092a8cbbedb6baececb96256f0ff70c39
font_02_sfnt_off00012976.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12976 10672 bytes
SHA-256: 0cbdc89e504e12a4c39d226d8569ce2b7c4854fff87771e7d20a262be5f50b30

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