Malicious PDF — malware analysis report

Static analysis result for SHA-256 56749bc48998336d…

MALICIOUS

PDF

81.3 KB Created: 2021-09-17 21:53:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 4a5660cd0ba4f845ad95a84f5fc9d2f8 SHA-1: 811e96a5e330d3b5b814fe7b497e1253892d03ec SHA-256: 56749bc48998336df32e0983bdba751a473d973a86b9e9f3837c8c65efeaa196
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous external URIs, with one prominent URL pointing to a site that appears to be a link farm designed to redirect users. The presence of external links suggests an intent to redirect users to malicious sites for further exploitation or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 https://pixomot.ru/uplcv?utm_term=download+aplikasi+vidmate+for+pc PDF link annotation
    • http://2rent.gr/userfiles/file/26201348788.pdfIn PDF document text
    • https://ambient-interier.cz/files/files/78728392152.pdfIn PDF document text
    • https://www.bussmann-tiefbau.de/ckfinder/userfiles/files/63573427678.pdfIn PDF document text
    • https://h16hr15k-h19hr37urn.com/contents/files/55934071551.pdfIn PDF document text
    • http://originalcheck.it/public/img_admin/file///ganuketu.pdfIn PDF document text
    • https://jpt.mysmartedu.com/uploadimages/files/zoxilesolewatafemapap.pdfIn PDF document text
    • https://ecpa.fr/uploaded/file/mizokujabipof.pdfIn PDF document text
    • http://alexdisinfestazioni.com/userfiles/files/94339993473.pdfIn PDF document text
    • https://tbsva.org/Upload/files/20210906173131.pdfIn PDF document text
    • https://questyme.ca/userfiles/file/tolimeguvuxibozokitaxisod.pdfIn PDF document text
    • http://beiks.info/public/file/52533655387.pdfIn PDF document text
    • http://propack-th.com/image/upload/File/98511384187.pdfIn PDF document text
    • https://associazionedynamica.it/uploads/file/gezevolesojikox.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/16130bb40d7dd5---90606919105.pdfIn PDF document text
    • https://hijaulumut.com/contents/files/26715544305.pdfIn PDF document text
    • http://stellarvvv.ru/ckfinder/userfiles/files/zawevewaxagapavunaw.pdfIn PDF document text
    • http://espressobuilders.com/app/webroot/files/userfiles/files/fodelobifojuxabumufikof.pdfIn PDF document text
    • https://johanbjerke.se/userfiles/file/62426108123.pdfIn PDF document text
    • http://suportti.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140e54294c2b---sumufufub.pdfIn PDF document text
    • https://siahotel.com/userfiles/files/fulere.pdfIn PDF document text
    • http://obchodsezlatem.cz/upload/files/44472158445.pdfIn PDF document text
    • http://onlinemidias.com/ckfinder/userfiles/files/52530142272.pdfIn PDF document text
    • http://www.gulbaharsigorta.com/contentData/file/7233771746.pdfIn PDF document text
    • http://constantemail.com/userfiles/file/163184243363160401519.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_off0000d75a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD75A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ef6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF6C 17912 bytes
SHA-256: 579eacba028b93a9ec7aa2ff0c16f4fbdf39b0339ed193031a2556a1c6203069
font_02_sfnt_off00011dbc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DBC 11028 bytes
SHA-256: 69b6408636da0ec71132f3aaf8d17ca9b1e2c4972ee9e71ec117e6dc8a7aa820

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