Malicious PDF — malware analysis report

Static analysis result for SHA-256 784ce0f724344783…

MALICIOUS

PDF

69.4 KB Created: 2021-09-27 17:14:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 8ee412142124a45ff3cccd1afaa201a5 SHA-1: 590aa10d4da2f1fe08d688a9aa0445c0a633533d SHA-256: 784ce0f7243447837d91215d3df68e3597febca2adcaa4c42aa01907e24b4143
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by multiple heuristics, including a high ML score and ClamAV detection as a phishing trojan. The document contains a large number of embedded URLs pointing to external PDF files, suggesting a link farm designed to redirect users to malicious content. While no scripts were explicitly extracted, the presence of numerous external links and the overall detection as a phishing trojan indicate a malicious intent to deceive users into downloading potentially harmful files.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://tikatalog.sk/_files/file/7509548976.pdf In PDF document text
    • http://elcivan.com/admin/UserFiles/file/55803260139.pdfIn PDF document text
    • http://tv-sat.cz/userfiles/file/47264936713.pdfIn PDF document text
    • http://kaymccarthy.com/immagini/file/88727188604.pdfIn PDF document text
    • http://eros-arena.com/eros/userfiles/file/10173929410.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/00ec0a27e34e869a123d2141abba6af9/pelikutedilodutalozu.pdfIn PDF document text
    • https://institut-arabe.org/ckfinder/userfiles/files/nokejiputaze.pdfIn PDF document text
    • https://bodymart.in/ckfinder/userfiles/files/ximokesikerad.pdfIn PDF document text
    • http://lienming-rubber.com/uploads/files/202109161412382726.pdfIn PDF document text
    • http://hkacca.com/userfiles/xugupegafudunuzowapepoxu.pdfIn PDF document text
    • http://dui-antidote.com/images/userfiles/file/sarazix.pdfIn PDF document text
    • http://bjzjygj.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/ronofixoteliwatitajig.pdfIn PDF document text
    • https://bipalisdemo.dashindonesia.com/userfiles/files/63176078364.pdfIn PDF document text
    • https://www.groupe-coelho.fr/ckfinder/userfiles/files/nuzeg.pdfIn PDF document text
    • http://alimentosldm.com/userfiles/file/5408611233.pdfIn PDF document text
    • http://satcomlink.com/userData/board/file/xuregatusorekuvulazigubak.pdfIn PDF document text
    • https://paloaltospeakerseries.com/wp-content/plugins/super-forms/uploads/php/files/74535003eb1b211cd639e089f96f3a24/67153247565.pdfIn PDF document text
    • http://addon-colsman.somantec.net/ckfinder/userfiles/files/fudovizake.pdfIn PDF document text
    • https://cissud.eu/uploads/ck_editor/files/kuxajejuxagopixexof.pdfIn PDF document text
    • http://ksklinika.ru/ckfinder/userfiles/files/67491509894.pdfIn PDF document text
    • http://tyextractor.com/d/files/mikowelusuxojowiza.pdfIn PDF document text
    • https://girilawfirm.com/content_files/files/bixufazisu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=gta+5+download+apk+pc+free+downloadPDF 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_off0000ace7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xACE7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c4f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4F9 15880 bytes
SHA-256: 4dbcfe7024e89d201f3d99f74dc48c982aa268945c5feb076594b59622c64fc9
font_02_sfnt_off0000ed9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED9A 10704 bytes
SHA-256: 7f908a60fdc64bf1472cdb466c54c9249f661766ead0c6b7d25f50f78afaeac9