Malicious PDF — malware analysis report

Static analysis result for SHA-256 96cfafb4206b4f4b…

MALICIOUS

PDF

74.6 KB Created: 2021-09-09 14:23:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-02
MD5: 17e848e85ffa9f529e73e19a2e273187 SHA-1: 8fbea0ec693fd4ca0c5273fc9ca6c9df517b926d SHA-256: 96cfafb4206b4f4ba3bcdcbd66d6aafbb0a9716acc26181820563a477849c656
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://philabc.ru/uplcv?utm_term=geometry+dash+hack+apk+2.1 PDF link annotation
    • http://cozycornerexpress.com/uploads/files/20594456940.pdfIn PDF document text
    • https://heritran.vn/uploads/news_file/nirapetifiwebipetojani.pdfIn PDF document text
    • http://bpabv.nl/uploadfiles/file/24204077066.pdfIn PDF document text
    • http://nakakinpump.kr/fckeditor/upload/file/xoligaxezuzarewukaxebagel.pdfIn PDF document text
    • http://polipadel.com/userfiles/file/netawitoxubid.pdfIn PDF document text
    • http://timecraftz.com/userfiles/file/pases.pdfIn PDF document text
    • http://www.investinwielkopolska.pl/application/lib/ckfinder/userfiles/files/33644600271.pdfIn PDF document text
    • http://www.cpnatacao.pt/backoffice/ckfinder/userfiles/files/2650460554.pdfIn PDF document text
    • https://paymentor.nl/uploads/file/selibiwusesuvukifuwilo.pdfIn PDF document text
    • http://pavcargo.ru/wp-content/plugins/super-forms/uploads/php/files/9854a1a29eb69573edf5a56c2f5efd3e/65757292814.pdfIn PDF document text
    • http://www.iece.in/userfiles/file/xeweviripimigowawupodu.pdfIn PDF document text
    • http://prograsifkalip.com/files/98378668784.pdfIn PDF document text
    • http://www.mkkdigital.pt/wp-content/plugins/formcraft/file-upload/server/content/files/1613104d9e5e36---92028139917.pdfIn PDF document text
    • http://turningpointdigital.com/cote_dor_import/admin/ckfinder/userfiles/files/bipabovirixik.pdfIn PDF document text
    • http://cachnhietcacham.vn/Images_upload/files/76590278398.pdfIn PDF document text
    • http://xn--b1agpbmdtf.xn--p1ai/upload/file/71311541135.pdfIn PDF document text
    • http://saatgaamkansarasamaj.com/admin/uploads/files/dexexojereligakop.pdfIn PDF document text
    • https://interference.ajoda.eu/userfiles/files/tigetisiruwujoxafisemi.pdfIn PDF document text
    • http://wangyiphk.com/userfiles/34450454233.pdfIn PDF document text
    • http://timavoshipsupply.it/userfiles/file/ruwibafoxamesuko.pdfIn PDF document text
    • https://meritumptt.pl/dokumenty/file/73843409900.pdfIn PDF document text
    • http://watthaistuttgart.de/userfiles/file/vovonulopekijol.pdfIn PDF document text
    • http://synergienetwork.net/userfiles/file/zumamabovaroxatuzif.pdfIn PDF document text
    • https://sdudyogtechnologies.in/ckfinder/userfiles/files/ritapu.pdfIn PDF document text
    • https://brawlcall.jordanadams.com/ckfinder/userfiles/files/zaxitixututomuxasud.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_off0000c03f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC03F 11020 bytes
SHA-256: d2ea2c85321fa884592899faa61b9bc1d47f99a56c0758335415a6b2776c129e
font_01_sfnt_off0000da18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA18 16560 bytes
SHA-256: 90d575b2e758f7b105b1cdbdb626f39b5d328f6cc9aef7d0c9785d6a8d1d917d
font_02_sfnt_off000104d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104D0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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