Malicious PDF — malware analysis report

Static analysis result for SHA-256 10057672506477bf…

MALICIOUS

PDF

76.3 KB Created: 2021-09-11 01:23:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: e1222d72a814d99aacdf974d25610886 SHA-1: 28f308e9391fac49c3dda7bc6664eb28d8acb97a SHA-256: 10057672506477bf41ba87ad379b76905dcf7862e0fd6e52b8b1aabf81e3e4fb
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains embedded JavaScript and multiple external URIs, suggesting it is designed to redirect users to potentially harmful websites. The presence of numerous links, many on disposable hosting, further supports a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

Heuristics 6

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://huntic.ru/uplcv?utm_term=what+is+data+connection+on+my+phone PDF link annotation
    • http://worldofpacifiers.com/editor_uploads/system/files/joledap.pdfIn PDF document text
    • http://www.deadclan.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1613bc805a8518---bijadowetexil.pdfIn PDF document text
    • http://hiro-seiko.com/upload/files/lojurasaguvoregi.pdfIn PDF document text
    • http://www.mustwalge.ee/data/content/files/89291318956.pdfIn PDF document text
    • http://elskup.pl/images/assets/file/vejilo.pdfIn PDF document text
    • http://maslag.eu/userfiles/file/saxutida.pdfIn PDF document text
    • https://kingbakerypans.com/userfiles/file/84144006543.pdfIn PDF document text
    • http://studioiulianella.it/userfiles/files/19085753516.pdfIn PDF document text
    • http://alothongtin.com/upload/FCK/file/puvowewolugifaxuvod.pdfIn PDF document text
    • http://dulichtantai.com/files/uploaded/files/92577219408.pdfIn PDF document text
    • http://ztkammer.at/uploads/file/putafunenopenoxajoradet.pdfIn PDF document text
    • http://n3ss.ro/ckfinder/userfiles/files/39979126553.pdfIn PDF document text
    • https://dcicz.org/userfiles/file/lodapevojoviserefejus.pdfIn PDF document text
    • https://sakesushimn.com/userfiles/files/56025023418.pdfIn PDF document text
    • http://www.ximangsongthao.com/app/webroot/uploads/files/kixalumujaxoduziged.pdfIn PDF document text
    • https://glasschneider.koeln/wp-content/plugins/super-forms/uploads/php/files/fvvlr52ncnb2idtf9847lpm68r/gekizizeberotane.pdfIn PDF document text
    • http://sictombbi.fr/ckfinder/userfiles/files/63841177911.pdfIn PDF document text
    • http://thenext.pk/userfiles/files/ladofud.pdfIn PDF document text
    • http://epoch-making.jp/js/upload/files/binodemobes.pdfIn PDF document text
    • http://kukubara.com/zdjecia/file/17722194237.pdfIn PDF document text
    • https://caror.hu/ckfinder/userfiles/files/nepurux.pdfIn PDF document text
    • https://sibservis.com/ckfinder/userfiles/files/rotugakibovasalomit.pdfIn PDF document text
    • https://iphone-odklep.si/vsebina/kubawumo.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_off0000c631.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC631 17332 bytes
SHA-256: b48305c3ed81c56c13fbded278f539763aa8d0bdef707e83fd30c79f09fb5e38
font_01_sfnt_off0000f2bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2BB 10740 bytes
SHA-256: 445f82f0ea85efb5b5d42f8b59a552de40c773882d42a38933a67ad506b2f8af
font_02_sfnt_off00010b4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B4F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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