Malicious PDF — malware analysis report

Static analysis result for SHA-256 556022c223b5bf08…

MALICIOUS

PDF

74.3 KB Created: 2021-09-16 16:53:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 3607e82d303f687b2448d3ab85e9da5a SHA-1: bcceaafd4d066d46c980d89b9f949e29643ca735 SHA-256: 556022c223b5bf08bb08bbed8ccd32da8430365de94c8e98ba93f709b8c8b881
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics indicate the PDF acts as a link farm, directing users to multiple external URLs hosted on potentially compromised or disposable domains. These links are likely used to distribute phishing content or further malware stages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://laborke.ru/uplcv?utm_term=verb+exercise+for+class+5 PDF link annotation
    • http://cybernet-ap.com/UserFiles/File/83506955142.pdfIn PDF document text
    • https://channeloflove.com/ckfinder/userfiles/files/94634260463.pdfIn PDF document text
    • http://nissanotogovap.net/uploads/images/files/pimidiwabuxitepiseji.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/161317201b9aae.pdfIn PDF document text
    • http://moutierrozeille.fr/userfiles/file/vodilawadumalate.pdfIn PDF document text
    • http://zssadkowice.pl/pliki/datowa.pdfIn PDF document text
    • https://ever.dacola.com/upload/files/88606469566.pdfIn PDF document text
    • https://shunnasato.com/pumuxepaxokasewo.pdfIn PDF document text
    • https://webgirls-studio.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136b686d68df---vobumazavenele.pdfIn PDF document text
    • http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132f231dc143---33809587895.pdfIn PDF document text
    • http://telegid.tv/userfiles/files/41050491521.pdfIn PDF document text
    • https://ganganagardentist.com/userfiles/file/kirol.pdfIn PDF document text
    • http://xn--80aaaaaikdebj9ccf1ayja1b5a3q.xn--p1ai/ckfinder/userfiles/files/22029133983.pdfIn PDF document text
    • http://mwbright.com/upload_fck/file/2021-9-13/20210913193148233808.pdfIn PDF document text
    • http://china-baby-clothes.com/d/files/48236885799.pdfIn PDF document text
    • https://hsse.hssanesteban.cl/files/31714650762.pdfIn PDF document text
    • https://avantkart.com/wp-content/plugins/super-forms/uploads/php/files/uqd7u8i6fq4ei59nmgib87hanh/90819434142.pdfIn PDF document text
    • https://yodishit.com/uploads/userfiles/file/betexatuzamosobuka.pdfIn PDF document text
    • http://gardensyellowcab.com/admin/images/file/39435400686.pdfIn PDF document text
    • https://www.growxponential.com/wp-content/plugins/super-forms/uploads/php/files/o8h0ndevv5b7h4g28brn7upkku/bojil.pdfIn PDF document text
    • http://justsayhi365.com/uploads/file/13638227176.pdfIn PDF document text
    • http://simonkuehner.de/gfx/userfiles/files/bebopunize.pdfIn PDF document text
    • http://indagosrl.it/userfiles/files/tujisubivuvu.pdfIn PDF document text
    • http://wawa757.com/uploads/files/42521470250.pdfIn PDF document text
    • http://aarogyamedico.com/userfiles/file/majufikaguwukoxukegoreto.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_off0000c029.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC029 17132 bytes
SHA-256: 537908fa203602d3976ad456963d4d94df6e8913e750edbaa4085c327ff6eebb
font_01_sfnt_off0000ebb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBB7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000103ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103CE 10472 bytes
SHA-256: e1fa89bf4c9bf662477ce079f49c74f5f37ebeafc2c5dff0e8769cf23656b806

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