Malicious PDF — malware analysis report

Static analysis result for SHA-256 34963e019048bc0f…

MALICIOUS

PDF

75.8 KB Created: 2021-09-14 09:08:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: e5dc182fdd840f6071d18ed18380f21e SHA-1: 5858adad2160f03b6c57af5ea2ac849df6eecc53 SHA-256: 34963e019048bc0f7eaedcb4ee698aa307e862950e20f0b5158ca481c938bb38
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external URIs and is identified as a link farm on disposable hosting, suggesting it's used to redirect users to potentially harmful sites. The presence of embedded URLs and the PDF structure point towards a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://queure.ru/uplcv?utm_term=revolution+offroad+apk PDF link annotation
    • http://ljjxmining.com/uploadfile/file///2021090811353078.pdfIn PDF document text
    • http://giasuthanhdat.vn/Images_upload/files/90809309569.pdfIn PDF document text
    • http://msci.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/161362c732bd60---fidovalofi.pdfIn PDF document text
    • http://eros-arena-reutlingen.de/eros/userfiles/file/fulowebijegaj.pdfIn PDF document text
    • http://saringkarnwood.com/UserFiles/file/4522449758.pdfIn PDF document text
    • http://email-database.info/userfiles/file/14441106725.pdfIn PDF document text
    • http://holidayinntorino.com/userfiles/files/31585775209.pdfIn PDF document text
    • http://reklama-kemerovo.ru/files/files/nidufelatini.pdfIn PDF document text
    • http://centromp.it/userfiles/files/85494501970.pdfIn PDF document text
    • http://kunjipsc.com/uploads/files/milebuxubitetep.pdfIn PDF document text
    • https://mkycc4.com/kycc4.com/userfiles/files/xezofiwijotaxuma.pdfIn PDF document text
    • http://zhhyhb.com/uploadfiles/files/nasubivosewepidejo.pdfIn PDF document text
    • http://minisadik-margaritka.ru/admin/ckfinder/userfiles/files/61328464792.pdfIn PDF document text
    • http://fermobkorea.com/userfiles/file/20210911143841.pdfIn PDF document text
    • http://vivo-mebel.ru/upload/file/31854685912.pdfIn PDF document text
    • https://www.opsclown.it/ckfinder/userfiles/files/46236426136.pdfIn PDF document text
    • https://poulinstrapscan.com/userfiles/file/kurajopage.pdfIn PDF document text
    • http://scales-center.com/shop/fck_file/file/rumupuredesinifisub.pdfIn PDF document text
    • http://stavebnevyrobky.sk/www/upload/files/jefik.pdfIn PDF document text
    • https://wmu24.ru/media/file/77641095982.pdfIn PDF document text
    • https://brakos.it/file/fexidefej.pdfIn PDF document text
    • http://shippingengineering.com/files/ckeditorothers/wisowowag.pdfIn PDF document text
    • https://hilanguage-com-tw.triangle-design.com/files/mefalinukiko.pdfIn PDF document text
    • https://keluargamimpi2.com/contents/files/kodabexevidap.pdfIn PDF document text
    • https://foundryindia.org/userfiles/file/bejifivurukinejavobide.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_off0000c588.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC588 10624 bytes
SHA-256: 5a511dcbcdc70679a19b18259272b0a6c154e6d9ac70ec5be17d7b7c569de8fc
font_01_sfnt_off0000ddeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDEB 16808 bytes
SHA-256: 9b1c58e0fe1a0100a5434abe03ce105590e5a4ed5cdad1356f45a5a0e4d8a0a0
font_02_sfnt_off000109bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109BF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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