Malicious PDF — malware analysis report

Static analysis result for SHA-256 71378504fb601613…

MALICIOUS

PDF

72.8 KB Created: 2021-09-06 05:28:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 86a1ce74d74412a97cbfcd67ca7a19e2 SHA-1: 1967a4cbc84fb6ab43bcb2bbeb82182aa84a8d71 SHA-256: 71378504fb601613c7219cc3332d8aca7d0cf0ae4eac700c49c0e3bb5999ae80
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a link farm pointing to multiple compromised WordPress sites, likely intended to host malicious files. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic indicates the document likely instructs the user to download a password-protected archive, a common tactic to bypass gateway security. The ML classifier and ClamAV detection strongly suggest malicious intent, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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 http://pulsrmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a82f8b518e6---50293772249.pdf In PDF document text
    • http://www.garriagricola.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a02ce522bd8---49628255971.pdfIn PDF document text
    • http://geoodwierty.pl/files/file/59227031890.pdfIn PDF document text
    • https://cal.lighting/wp-content/plugins/super-forms/uploads/php/files/73624a88970ae49f2b4500126958ab6b/91534199953.pdfIn PDF document text
    • http://principessavencanice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ca4d1189aa0---rusenuvosexazuvitiver.pdfIn PDF document text
    • https://srldirect.com/ckfinder/userfiles/files/lolelesabel.pdfIn PDF document text
    • http://loveperfectionschool.com/upload/file/95427107639.pdfIn PDF document text
    • https://walkandsmile.com/userfiles/file/dikegopamazewumifogifek.pdfIn PDF document text
    • https://binhvi.com/upload/files/7096927602.pdfIn PDF document text
    • https://cahayamimpi1.com/contents//files/wedir.pdfIn PDF document text
    • https://bodwellassociates.com/wp-content/plugins/super-forms/uploads/php/files/aed0bb5f17aa664d6c501ce2d5055e9c/besubupoduz.pdfIn PDF document text
    • https://www.popcaffe.it/wp-content/plugins/super-forms/uploads/php/files/1e78c142be6c344258f8c36fe41e3a27/welarikigotifusosizokuta.pdfIn PDF document text
    • https://nepalaviationmuseum.com/userfiles/files/83744253078.pdfIn PDF document text
    • http://praguetransfer.com/files/file/ridikidexilef.pdfIn PDF document text
    • http://jngf.cn/files/file/55295881069.pdfIn PDF document text
    • http://wjvanderheidedienstverlening.nl/uploads/file/78106780256.pdfIn PDF document text
    • http://amon-syotengai.com/userfiles/file/66498901573.pdfIn PDF document text
    • http://nutronicltd.com/userfiles/file/27785598189.pdfIn PDF document text
    • https://agermag.ro/mm/file/lazugatijukolidojil.pdfIn PDF document text
    • http://polkovnik.su/upload/file/dijawavuk.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=moultrie+game+feeder+manualPDF 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_off0000bb2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBB2A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d33c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD33C 16692 bytes
SHA-256: 2cbb6520c99fcfff25a5d6923f72ffc8c07a2185a6bb216dd9320be6c8e27947
font_02_sfnt_off0000fe62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE62 10624 bytes
SHA-256: 9fbcf35828b2916d19864e3920729f9b4ec00b9e5bff81f93103e7c783fc7e9b

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