Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a480722b52cbc05…

MALICIOUS

PDF

81.1 KB Created: 2021-06-19 17:08:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 21504b377b78f0ce68aa313b1472f91a SHA-1: ee61571d538cc543b749bb0f05608d6ece8c6c0d SHA-256: 2a480722b52cbc0569f64cbeccd97ecf4a1bb9bb57a3dc6ab34f77108f6a675e
156 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as 'Pdf.Phishing.Trojan' and an ML classifier indicated a high probability of maliciousness. Heuristics identified it as a link farm pointing to compromised CMS uploads and disposable hosting, suggesting an attempt to redirect users to malicious sites. The document body is heavily obfuscated and contains what appears to be metadata rather than user-readable content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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 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://almondzwealth.com/administrator/imagetemp/file/zunewaxexoxuxizelor.pdf In PDF document text
    • https://alihuata.com/userfiles/file/82332227156.pdfIn PDF document text
    • http://immodraft.nrw/images/architekten_agentur_images_/file/xejiwiluzonegofefepa.pdfIn PDF document text
    • http://smartmedicaleg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c59e6fb35d1---ruloridize.pdfIn PDF document text
    • http://ajarnveerapong.com/UserFiles/file/87391090318.pdfIn PDF document text
    • http://bradleyhillsapartments.com/demo/uploads/contents/file/tijuwagozu.pdfIn PDF document text
    • https://youkuvpn.com/upload/files/97042448825.pdfIn PDF document text
    • https://nada70.org/userfiles/file/33840369735.pdfIn PDF document text
    • https://www.enviedecrire.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b72f240a6fb---36351915503.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/a6e2476e134d27e5f013ed6fa9a2c62c/47505243887.pdfIn PDF document text
    • http://modelkyujin.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cd877ef094---xekavanazigajujibip.pdfIn PDF document text
    • https://e-lightingcontrols.com/wp-content/plugins/super-forms/uploads/php/files/05d005667458a18cadaabb824e1faefc/29164440182.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=android+1+survival+craft+2PDF 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e2b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2B5 8112 bytes
SHA-256: 6cb37d3ffded3951c45fa8309bcaf2f634f92af67181216f9490bf2444eac1d8
font_01_sfnt_off0000fe30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE30 5248 bytes
SHA-256: ae50b23e21a8f945778034bcc863123b5ed4a5ca9d3b36f6871645f9963f73da
font_02_sfnt_off00011026.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11026 12212 bytes
SHA-256: 392825a0c29fd163938380da3a670c146bc888403356d48037df29b6d66339c5

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