Malicious PDF — malware analysis report

Static analysis result for SHA-256 a017ebfa74b11bf1…

MALICIOUS

PDF

106.8 KB Created: 2021-06-07 07:38:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: dc277c0af35db33437227ec7424a18f7 SHA-1: 91458fa1819596ccb00a7116f96789c833a52abb SHA-256: a017ebfa74b11bf1686bab832aadfde5ecbb40f41c079f2bdcf32556ed3f5512
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links to external resources, many hosted on compromised WordPress sites, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded URLs are likely used to redirect users to malicious PDF payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • 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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://chcial.ru/uplcv?utm_term=exercices+corrig%25C3%25A9s+capteurs+et+actionneurs+pdf PDF link annotation
    • http://www.mywil.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160b5638393dd0---wavezefevolopuvoju.pdfIn PDF document text
    • http://ambulatorioveterinarioscapindandrea.it/userfiles/files/nasedadazunufesivebij.pdfIn PDF document text
    • https://cald-lighting.com/wp-content/plugins/super-forms/uploads/php/files/3c7def22fad2143d846bcd8c62bc7a89/vumiwaluxoxisojafixil.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b30140a8970---51779054343.pdfIn PDF document text
    • http://www.blackhillsdancecentre.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae7899cfd6b---79854172606.pdfIn PDF document text
    • http://www.associatedomains.com/wp-content/plugins/formcraft/file-upload/server/content/files/160782b731a6c0---gabokedikejijolaluru.pdfIn PDF document text
    • http://akcjonariusz.com/UserFiles/file/62164199984.pdfIn PDF document text
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/ee0472rmrkfr86ppvqrerbq244/54109193734.pdfIn PDF document text
    • http://slowjamsundays.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072c35ee206a---98296749661.pdfIn PDF document text
    • https://lcd96.ru/wp-content/plugins/super-forms/uploads/php/files/c4f4823f19394708a6fe639e9f8704e0/rupetixixuxa.pdfIn PDF document text
    • http://midiabyz.com/wp-content/plugins/super-forms/uploads/php/files/e88e240f6b4f3adc0f54f7ffdf8d4669/tituxoxedabawiwo.pdfIn PDF document text
    • http://cukiernia-waltar.pl/qcms/userfiles/file/21576198374.pdfIn PDF document text
    • https://poolpoint.be/uploads/file/75494769481.pdfIn PDF document text
    • http://otvorene-srdce.sk/userfiles/file/dovobobebuf.pdfIn PDF document text
    • https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/595e18a2878fd8b7cf341add47d46180/jolapigeruki.pdfIn PDF document text
    • https://www.sblending.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607d9af1e077d---tiniraxawogonovuro.pdfIn PDF document text
    • http://speaklifeiamgreatness.com/files/files/jarunewozusapufomilut.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001504f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1504F 5340 bytes
SHA-256: 7e54b7693150b90d8c2d0f06c7af3c38ff6548ffcc7e5572a5825ae30028530f
font_01_sfnt_off0001624b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1624B 13632 bytes
SHA-256: d66880d007fdad4d1e056c66a15b3bd4e19aabc424d85ea800476edf8aa2548d
font_02_sfnt_off00018d25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18D25 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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