Malicious PDF — malware analysis report

Static analysis result for SHA-256 cbcc6bec2513c29e…

MALICIOUS

PDF

85.2 KB Created: 2021-06-28 13:53:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 1874be2834d928516d62191300dd7232 SHA-1: 1383676300eb107da56bc2eddff37c668d57d7f0 SHA-256: cbcc6bec2513c29e6469f8cc2bdf2f5c66f643e32ba76c2c034962f1c7b9526a
156 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. Heuristics identify it as a link farm hosted on compromised WordPress sites, with numerous distinct hosts and UTM term redirectors, suggesting a phishing or malware distribution scheme. The embedded URLs point to various PDF files on these compromised domains, likely serving as lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://taevlingar.se/images/pages/file/9532228669.pdf In PDF document text
    • https://g-ortho.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a32fe0e0589---lerolebijiramamukere.pdfIn PDF document text
    • http://www.grundys.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160842703205fe---jojeka.pdfIn PDF document text
    • http://for-rent-leuven.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afdd9f9d031---sanizemosisudilujakulener.pdfIn PDF document text
    • https://sweetestspaparty.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609628f94fae6---66940797207.pdfIn PDF document text
    • http://absolutelyneon.com/userfiles/file/tupujuzufenovakov.pdfIn PDF document text
    • http://liyangah.com/Upload/file/gatib.pdfIn PDF document text
    • http://perfectthesale.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093189b4027b---80221975387.pdfIn PDF document text
    • https://nezrenpin.com/calisma2/files/uploads/wiromedo.pdfIn PDF document text
    • http://wuxihemei.com/ckfinder/userfiles/files/20210615_233844.pdfIn PDF document text
    • https://slavica.ru/wp-content/plugins/super-forms/uploads/php/files/9389c694f009b424509637e435f4e1b9/83566888416.pdfIn PDF document text
    • http://www.primalegal.eu/wp-content/plugins/super-forms/uploads/php/files/r3jm5j97r9iqnv3dd0bom5s8v7/gajezosejomugilosulamexin.pdfIn PDF document text
    • https://akarchlight.com/wp-content/plugins/super-forms/uploads/php/files/f56a0bcacf303538993d775acf9306a6/xuvumofajepufiwoji.pdfIn PDF document text
    • http://bfr-bialapodlaska.pl/userfiles/file/36706876488.pdfIn PDF document text
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/92b440362e10d4a2c0d8d7a7475edb4a/zivogawegobugome.pdfIn PDF document text
    • https://masterpieces-mallorca.com/wp-content/plugins/super-forms/uploads/php/files/97ea0fcc38587afb9efae0741f2f591c/82886844344.pdfIn PDF document text
    • http://gf-location.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1608b46bebae9b---vagitakuwivenagojebober.pdfIn PDF document text
    • https://kompaspt1.com/contents//files/54373719633.pdfIn PDF document text
    • http://www.verneteco.com/ckfinder/userfiles/files/54813252113.pdfIn PDF document text
    • https://quangcaowebsite.vn/uploads/files/59931577814.pdfIn PDF document text
    • http://www.driftime.ee/wp-content/plugins/formcraft/file-upload/server/content/files/160ac900e5e039---fivojuvag.pdfIn PDF document text
    • https://fermuar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160871d588a888---lutilazajinumiz.pdfIn PDF document text
    • https://www.harnoordesigns.com/wp-content/plugins/super-forms/uploads/php/files/8k2o261t2la40mlcetfvscthg5/98606720605.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=prayer+and+the+word+of+godPDF link annotation
    • 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_off0000ea31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA31 10528 bytes
SHA-256: e6a82616817554a5b193a538599a7e5db953545df2dd73e3dcbea9a35cb607ad
font_01_sfnt_off000101f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101F8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011a0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A0A 17760 bytes
SHA-256: dab43be02081c98aad8fded35425a9f0f5345e5bd29bc09a5cbba62b59350042

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