Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb0ca9c7ba43d6bd…

MALICIOUS

PDF

82.2 KB Created: 2021-09-16 11:34:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 505b9783e9a20bc67971d78f127f225b SHA-1: caa5e34574085c91dcc8d57cb6114d453289e2b4 SHA-256: fb0ca9c7ba43d6bd350ff8739ad81310d4ff1b3413aca940af4c3d051971d1cf
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV and an ML classifier, with multiple heuristics indicating it's a link farm pointing to compromised websites and disposable hosting. The embedded URLs, such as 'https://pixomot.ru/uplcv?utm_term=exchange+online+login+admin', suggest a phishing lure related to online services. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with a phishing or malware distribution campaign, likely initiated via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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=exchange+online+login+admin PDF link annotation
    • http://omonetach.pl/foto/ilustracje/file/bemivumemevo.pdfIn PDF document text
    • http://cnsgawefgl.netsociality.com/upload/files/niruzemuforir.pdfIn PDF document text
    • https://hotelreviewreserve.com/basefile/hotelreviewreservecom/files/lumeginewotolokusug.pdfIn PDF document text
    • https://dalilak1.com/userfiles/file/5111220277.pdfIn PDF document text
    • https://nolimitscenter.be/peausitive/images/FCKeditor/file/sivudibugutifelavozo.pdfIn PDF document text
    • https://tlproduct.com/userfiles/file/zikugefoxo.pdfIn PDF document text
    • http://aromata.ru/upload/files/nokepaxija.pdfIn PDF document text
    • https://www.mftelhas.com.br/adm/Editor/ckfinder/userfiles/files/zalisulotukikawap.pdfIn PDF document text
    • https://melz-feu.ru/upload/bemifapesu.pdfIn PDF document text
    • http://vipavtoufa.ru/wp-content/plugins/super-forms/uploads/php/files/8c104b346400e32221296722411d5a25/4932443582.pdfIn PDF document text
    • https://www.helpagesl.org/wp-content/plugins/formcraft/file-upload/server/content/files/1613a96656ece4---wajeluxigabigugatubivu.pdfIn PDF document text
    • http://lnianemarzenie.pl/userfiles/file/wepezudegiluxusukek.pdfIn PDF document text
    • http://snieznik.pl/userfiles/file/17622480886.pdfIn PDF document text
    • https://servingltda.com/userfiles/file/nenimuj.pdfIn PDF document text
    • http://ybshajiang.com/userfiles/file/2021-09-06/2109062245220890151gu3d9y7pi2h.pdfIn PDF document text
    • http://kwik-it.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16142a71656599---37468071561.pdfIn PDF document text
    • http://w-mill.jp/images/file/bawimojapilul.pdfIn PDF document text
    • https://dermatologie-chamonix.com/userfiles/file/14368424280.pdfIn PDF document text
    • http://hingliltd.com/userfiles/pubafovav.pdfIn PDF document text
    • http://vector-mebel.ru/uploads/files/ledefodebefopawevi.pdfIn PDF document text
    • https://hacunamatata.ru/wp-content/plugins/super-forms/uploads/php/files/ef234f1dc096969b46c703245d0088e9/65602935813.pdfIn PDF document text
    • https://www.reliancecareuk.com/wp-content/plugins/super-forms/uploads/php/files/603c6a5a81f58a55be7d6b90c4cbdb49/darobi.pdfIn PDF document text
    • http://kiko168.com/UploadFile/file/20210908015229434.pdfIn PDF document text
    • http://xdata.pl/app/webroot/img/ckf/files/sonilobofazus.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_off0000dbc5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBC5 18296 bytes
SHA-256: cc4a11cf212a0c19813e2176b6f8be2d6e8e7a74afb3b4b5c5834efdf639d206
font_01_sfnt_off00010b78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B78 10536 bytes
SHA-256: d6e6d0aca845c4668200182d681b299bc4518c0b9add555573a9a879bfaede9b
font_02_sfnt_off00012309.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12309 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.