Malicious PDF — malware analysis report

Static analysis result for SHA-256 94074f0c74ff7cc1…

MALICIOUS

PDF

84.5 KB Created: 2021-09-06 00:32:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: e398a5c912f7c164d86d582e4daae019 SHA-1: 812e0265737f9a3ca78ac76a6baa5e9c9f9ea14e SHA-256: 94074f0c74ff7cc1c8ef1a87f5ea59b97ce93399cc63715fdf486ac2984c32aa
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The PDF structure and embedded links are consistent with phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://crysiq.ru/uplcv?utm_term=pri%C3%A8re+d%27adoration+du+saint+sacrement+pdf PDF link annotation
    • http://cukierniabrzezinski.pl/www/artizam/fck/file/45778451887.pdfIn PDF document text
    • https://cargobull.cz/res/file/mewomoveg.pdfIn PDF document text
    • http://dansungsala.com/uploads/files/68662718362.pdfIn PDF document text
    • https://taechoclub.com/FileData/ckfinder/files/20210726_7C7FA8C0A330DCF7.pdfIn PDF document text
    • https://expeditions-travel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080296e0f975---wekotifozusesobizuveman.pdfIn PDF document text
    • https://adikkeempat.com/contents//files/75026842342.pdfIn PDF document text
    • https://www.heainc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f399b90c9b---64058844202.pdfIn PDF document text
    • https://mimpishio1bet.com/contents//files/wemexe.pdfIn PDF document text
    • https://atolab.it/wp-content/plugins/super-forms/uploads/php/files/9286dadc1573b04c52e77772e7a9e19f/78643629622.pdfIn PDF document text
    • http://www.makattakasinti.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d9b93ea8ea---sakutupakorokoji.pdfIn PDF document text
    • https://extremetour74.ru/wp-content/plugins/super-forms/uploads/php/files/d7404d69e16f4da7cded86406ff827ec/12718829109.pdfIn PDF document text
    • http://inspiredindianfoundation.org/uploads/72855137799.pdfIn PDF document text
    • https://brune-schmuckwerk.de/ckfinder/userfiles/files/fubobabugoj.pdfIn PDF document text
    • http://kursadowicz.pl/Upload/file/zigosumufanimef.pdfIn PDF document text
    • http://prvugkh.ru/uploads/files/47657436500.pdfIn PDF document text
    • http://usaoxin.com/userfiles/2021-6/file/kodutajovinive.pdfIn PDF document text
    • http://verkoop-je-wagen.be/wp-content/plugins/formcraft/file-upload/server/content/files/16130a94c5559c---mosawezopiti.pdfIn PDF document text
    • http://finara-v.com/file_media/file_image/file/ronukakobeb.pdfIn PDF document text
    • https://www.ferienhof-schneider.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608519859c761---81086980491.pdfIn PDF document text
    • https://www.clubmanizales.com.co/wp-content/plugins/formcraft/file-upload/server/content/files/160789e1f57456---gonux.pdfIn PDF document text
    • https://bilbox.es/wp-content/plugins/super-forms/uploads/php/files/1d135985e8afc133444c5ea7ca0d97f9/76519057556.pdfIn PDF document text
    • http://global-poseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607025630887c---58746575034.pdfIn PDF document text
    • https://envomask.com/wp-content/plugins/super-forms/uploads/php/files/954c6632fbcc2d60d2bb6e5e9e7b6842/xipoxubuvolaxa.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_off0000df5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF5F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f771.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF771 19872 bytes
SHA-256: b3643e4d47a291ea8b42f6fd0e090b4ea8beeed23848d6c67c7bf62b0fbb7031
font_02_sfnt_off0001285d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1285D 11024 bytes
SHA-256: 18ee03a3406262059666b4c7d2ea1aa04d3eb8a4aa26f90ea305f333379fa076

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