Malicious PDF — malware analysis report

Static analysis result for SHA-256 955627615de6bb34…

MALICIOUS

PDF

73.8 KB Created: 2021-03-29 04:24:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 1c20fd4c3c55e8136f8e7180ff1f7963 SHA-1: 4428acc94d640c11111fcd2647b87e66a12060f8 SHA-256: 955627615de6bb34270526d9e2058d832c56d3fa509d9f663201cca2d241b390
194 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, indicating malicious intent. It contains a link farm with numerous external URLs, suggesting it's designed to redirect users to potentially harmful websites. The presence of a 'download button' lure further supports a phishing or malware distribution scenario.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://jacksth.ru/award?keyword=cea+claim+form+2020+18+pdf PDF link annotation
    • https://lirodute.weebly.com/uploads/1/3/1/8/131871659/tipixoka_saliridus_zokevule.pdfIn PDF document text
    • https://laxivaxof.weebly.com/uploads/1/3/0/8/130874385/7112016.pdfIn PDF document text
    • https://newavutija.weebly.com/uploads/1/3/1/8/131871734/5993e19aadf.pdfIn PDF document text
    • https://getenulezawo.weebly.com/uploads/1/3/4/8/134897364/4455183.pdfIn PDF document text
    • https://febufovita.weebly.com/uploads/1/3/4/3/134324671/6227192.pdfIn PDF document text
    • https://vurikiwuguwek.weebly.com/uploads/1/3/1/4/131408439/wolepedisun.pdfIn PDF document text
    • http://dvestideyli.xyz/kenneth_burke_language_as_symbolic_action35hb8.pdfIn PDF document text
    • http://googsnat.space/morirakenamorawik99zj3.pdfIn PDF document text
    • http://lnstagram-blue-ticks.com/branson_mo_shows_october_2020a93vl.pdfIn PDF document text
    • https://niwuxepajo.weebly.com/uploads/1/3/4/6/134669398/1185080.pdfIn PDF document text
    • https://fapurexetekuwud.weebly.com/uploads/1/3/4/5/134508670/lotoduxekegu_jaxuredekokob.pdfIn PDF document text
    • https://lijujizakivim.weebly.com/uploads/1/3/4/6/134634855/zufipu_dilagejif.pdfIn PDF document text
    • https://fexasesari.weebly.com/uploads/1/3/1/0/131070539/0cd4d5cf14c2.pdfIn PDF document text
    • https://lareduna.weebly.com/uploads/1/3/1/4/131453109/b0e959963740ca.pdfIn PDF document text
    • http://universe1.space/fabedenowopxzubt.pdfIn PDF document text
    • http://migerov.xyz/173512191931tozk.pdfIn PDF document text
    • https://mivewuwadomabat.weebly.com/uploads/1/3/1/6/131606259/butopaxagawi-lujelamif-ravimejej.pdfIn PDF document text
    • https://pofemazavuson.weebly.com/uploads/1/3/2/3/132303373/8298450.pdfIn PDF document text
    • https://bowotile.weebly.com/uploads/1/3/4/7/134759747/pijefe.pdfIn PDF document text
    • https://wutejaguruloz.weebly.com/uploads/1/3/1/8/131871665/3403806.pdfIn PDF document text
    • https://kotezoxeruv.weebly.com/uploads/1/3/5/3/135345651/pekoz-xuginizimijom-pozemekarawas-nolika.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jowunimigafej.rf.gd/jusav.pdfIn PDF document text
    • http://gibipupoxo.epizy.com/84058700544.pdfIn PDF document text
    • http://godexoba.rf.gd/apicultura_moderna.pdfIn PDF document text
    • http://fobiwuna.epizy.com/gopixonatosu.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e198.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE198 5548 bytes
SHA-256: c65a6c99f613e94f47f57a94fa958f0be5466967d55b03e8e24b7e0c34bfb27f
font_01_sfnt_off0000f45f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF45F 10828 bytes
SHA-256: 4581f7d0529eac20465d02f3e7e53a5e1b720a7a71bdfb5ccfeb1f5873a3968e