Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e4f140993ed8528…

MALICIOUS

PDF

80.8 KB Created: 2021-09-11 12:06:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: fbad514c6ae47c6e65e16f6ffe0a2f3c SHA-1: 20600dac4eba7d5dd26fb3f3587c232d247d7a1c SHA-256: 5e4f140993ed8528fb83e1db8f3aac401d1fb040eee50b9feb2c2851273ffcbd
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or trojan threat. It contains a large number of embedded URLs pointing to various domains, suggesting a link farm designed to redirect users to malicious content. The presence of 'utm_term=download' in one URL hints at a lure for software downloads.

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://bonaparte-kerkrade.nl/fckeditor/ckfinder/userfiles/file/xiwavunukukop.pdf In PDF document text
    • http://hajnysport.cz/FCK_userfiles/file/66927215973.pdfIn PDF document text
    • http://greenearthgardens.org/userfiles/56518384557.pdfIn PDF document text
    • http://osteriadelcampanile.com/userfiles/files/dusexixewunoparevif.pdfIn PDF document text
    • http://aorganboys.handyfriendship.com/upload/files/6764040451.pdfIn PDF document text
    • https://juniorclublivorno.com/sitonews/images_upload/files/729990891.pdfIn PDF document text
    • https://o2opr.co/userfiles/files/40446192673.pdfIn PDF document text
    • http://yotlist.com/uniformkontakt/userfiles/image/files/8610715512.pdfIn PDF document text
    • http://vinabomi.com/uploads/userfiles/file/kogurakuwotez.pdfIn PDF document text
    • http://hpcad.pl/Upload/file/24137774299.pdfIn PDF document text
    • http://vodnik48.ru/content/file/45326393942.pdfIn PDF document text
    • http://datacomsystems.cz/userfiles/file/16995717939.pdfIn PDF document text
    • http://pulsarvn.com/media/ftp/file/xetifoleberozuzijedujepis.pdfIn PDF document text
    • http://robedecreateur.com/img/files/74471799082.pdfIn PDF document text
    • http://knowleangling.co.uk/ckfinder/userfiles/files/45286134465.pdfIn PDF document text
    • http://wittlich-luexem.de/userfiles/file/laliler.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/97091995568.pdfIn PDF document text
    • https://suhrsmad.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1613b710606c91---pedamenevemufesemawotem.pdfIn PDF document text
    • http://nenkin-t.com/upload_img/ck/files/genanejaxagaru.pdfIn PDF document text
    • http://www.civilhospitalpalampur.in/img/uploads/files/filirowil.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=download+dragon+city+unlimited+moneyPDF link annotation
    • http://s292376414.onlinehome.fr/datas/imgmail/file/95587830197.pdfIn PDF document text
    • 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_off0000d6d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6D5 10848 bytes
SHA-256: 11939fbfe325c576daffa2192a3f0a867f2a9a2d799eb49e496e100018ba0124
font_01_sfnt_off0000efb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFB9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000107cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107CB 17572 bytes
SHA-256: 4466622b5174de297303ce24cf75a9d40796420c047f8dd1fc692347673652c5

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