Malicious PDF — malware analysis report

Static analysis result for SHA-256 9437005d3c717e28…

MALICIOUS

PDF

74.4 KB Created: 2021-09-28 22:51:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: e86a0065187e4098371f6de708e998d4 SHA-1: d8d411f1e5a1e8f096996e2a94fdcceee14a8351 SHA-256: 9437005d3c717e281dcc0bbec26835aa87ce4599f0d270893c01c3185d5ce11d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to disposable hosting or compromised CMS upload directories, indicating a link farm designed to distribute malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware delivery. No scripts were extracted, but the structure and URL patterns are consistent with a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9827

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
  • 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://garglob.ru/uplcv?utm_term=watch+fast+and+furious+6+online PDF link annotation
    • http://hyunshin.net/userfiles/file/pivefivudoliv.pdfIn PDF document text
    • http://vekosgroup.ru/userfiles/file/82364558270.pdfIn PDF document text
    • https://drosamahetta.com/userfiles/file/pinugolovabovake.pdfIn PDF document text
    • https://usgcambodia.com/userfiles/file/misemavezeli.pdfIn PDF document text
    • http://abwclayton.com/uploads/files/fobixigemopan.pdfIn PDF document text
    • http://aasghsflqsae.handylover.com/upload/files/vokebak.pdfIn PDF document text
    • https://eletroluz-al.com/_IMG/img_internas/file/tulajajabibivijapaz.pdfIn PDF document text
    • http://asiadomainstore.com/userfiles/file/romurata.pdfIn PDF document text
    • http://www.insurancedirectcanada.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16137564e3995e---lojovinedixiko.pdfIn PDF document text
    • http://www.cuadernos.in/wp-content/plugins/formcraft/file-upload/server/content/files/16141126c1a5cb---wiruxirefobepikox.pdfIn PDF document text
    • http://jmvlpslimited.com/ci/userfiles/files/33389949808.pdfIn PDF document text
    • https://koncnc.com/genelresimler/file/foniz.pdfIn PDF document text
    • https://sskundal.com/userfiles/file/7895375076.pdfIn PDF document text
    • http://autoklej.pl/app/webroot/media/files/87490581999.pdfIn PDF document text
    • http://distant-property.ru/fck_editor_files/files/7606758654.pdfIn PDF document text
    • https://hefcom-hydraulics.com/ckfinder/userfiles/files/luzudejer.pdfIn PDF document text
    • https://bnbtravels.com/ckfinder/userfiles/files/11177279939.pdfIn PDF document text
    • https://www.nvsrolko.org/ckfinder/userfiles/files/78166219104.pdfIn PDF document text
    • http://www.kocay.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/161410fbc593ac---36283947388.pdfIn PDF document text
    • https://www.champagne-auge-dascier.com/ckfinder/userfiles/files/dokaferixilofiponigurapug.pdfIn PDF document text
    • https://californiaoptionsrealestate.com/wp-content/plugins/super-forms/uploads/php/files/e6e11150e387ce3da598ad4e3fe0d7a0/51128500908.pdfIn PDF document text
    • https://marljivo.hr/UserFiles/files/ninovarexavaninotugerevo.pdfIn PDF document text
    • https://virker-ikke.dk/files/pefezogiwepaxulutinaxa.pdfIn PDF document text
    • http://scenekunstskolen-efteruddannelsen.dk/ckfinder/userfiles/files/tivog.pdfIn PDF document text
    • https://avukat.dnsaktif.net/upload/files/32521999403.pdfIn PDF document text
    • http://barrarioservicos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1614433ba036b4---safuzo.pdfIn PDF document text
    • http://twilaw.com/files/files/88781642125.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_off0000bd9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD9C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d5b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5B3 10836 bytes
SHA-256: 704639d8c282928ab4e83ae750678377abf86f0103b280d8df5b8e4427c8b472
font_02_sfnt_off0000eeb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEB0 17712 bytes
SHA-256: ab7374e6bc2fa0cbf88a97e041285195724370f0503b90750420cdd54e7a3bd1

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