Malicious PDF — malware analysis report

Static analysis result for SHA-256 072891002b40bd23…

MALICIOUS

PDF

97.2 KB Created: 2021-09-16 10:33:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: bdfc6043342f200fb22496a7f588d9ca SHA-1: 6a5455db2201343a4513f2904681836778d2a421 SHA-256: 072891002b40bd237eb3b8dac33e0a4514d53af9944d4b1433dfeef8b179d3a8
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to disposable domains, indicating a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent. The presence of external URIs and the nature of the URLs indicate the PDF is likely used to redirect users to malicious sites, potentially for phishing or to download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9806

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 https://irlanc.ru/uplcv?utm_term=touch+you+roblox+id PDF link annotation
    • http://zhizhencn.com/filespath/files/20210915200858.pdfIn PDF document text
    • http://lulanjina.net/upload/files/48973747456.pdfIn PDF document text
    • http://missteenqueenuk.com/userfiles/file/35013000863.pdfIn PDF document text
    • http://watdoenwevandaag.nl/upload/22264279758.pdfIn PDF document text
    • http://kunas.lt/app/webroot/uploads/files/xudamowonomen.pdfIn PDF document text
    • https://ventadeterrenosagricolas.com/userfiles/file/vegezelemenalepenavidana.pdfIn PDF document text
    • http://kondicionery-dzerzhinskij.ru/upload_picture/file/fozorajok.pdfIn PDF document text
    • https://selapro.com.au/application/third_party/ckfinder/userfiles/files/rijeninesamepigegexo.pdfIn PDF document text
    • http://arablift.net/userfiles/file/24065473409.pdfIn PDF document text
    • http://melodylavernebettencourt.com/media/file/72554427302.pdfIn PDF document text
    • https://fnb-concepts.com/images/uploads/files/60017170357.pdfIn PDF document text
    • http://izhar-energy.com/userfiles/file/bopalebuvadoxezomujozevab.pdfIn PDF document text
    • http://englandmatchshirts.com/assets/file/seviwi.pdfIn PDF document text
    • http://about-dogs.ru/upload/file/63141106168.pdfIn PDF document text
    • http://sk-uralstroy.ru/uploads/files/reziweteburefewe.pdfIn PDF document text
    • http://victorylimo1.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b380488667---tikojesojutiloxikuwelemo.pdfIn PDF document text
    • https://cncostruzioni.com/userfiles/file/9583707945.pdfIn PDF document text
    • https://ww150005.linebot.net/upfile/files/20210905063213.pdfIn PDF document text
    • http://bearings-home.com/userfiles/file/44725936152.pdfIn PDF document text
    • http://tehpromyar.ru/media/file/pafezigozabukakusaja.pdfIn PDF document text
    • http://studio-rivetti.it/userfiles/files/fofigugokefov.pdfIn PDF document text
    • https://castilloexterior.es/ckfinder/userfiles/files/89941296685.pdfIn PDF document text
    • http://marcth.pl/media/fck/file/89568527357.pdfIn PDF document text
    • http://shijijiaming.net/filespath/files/20210914092804.pdfIn PDF document text
    • https://skillmapmagazine.com/ckfinder/userfiles/files/sesesavilodo.pdfIn PDF document text
    • https://mraos.com/web/userfiles/file/bevaretevimomimofak.pdfIn PDF document text
    • https://abzesolar.com/uploads/files/segexekumi.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_off00010eeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EEB 10224 bytes
SHA-256: f1c3cdd62dafda4c82e7a9d20ca91e4f7320c4864d7aaeec2eddfc0e1cc859da
font_01_sfnt_off000125f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125F1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013e03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E03 21684 bytes
SHA-256: 348417b9f403a28ac46ea3495a69461ead82fc5d6b0aca4cbce77d35ba902b9e