Malicious PDF — malware analysis report

Static analysis result for SHA-256 17a9ea52915c15ef…

MALICIOUS

PDF

84.9 KB Created: 2021-04-02 03:22:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: c6a71519527d3aaa4c4372d7eb503278 SHA-1: 02f0bf010fda0dd27450d2699cfe14722efec23b SHA-256: 17a9ea52915c15ef5aaec743a3626294ee60a07438c0d7ae53489982a796ed27
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links pointing to disposable domains, a common tactic for SEO spam or distributing malware. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as a phishing trojan. While no scripts were extracted, the PDF structure and numerous external links suggest an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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.
  • 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://xajibur.ru/strik?utm_term=what+makes+a+food+high+fodmap PDF link annotation
    • http://wepopoxuzune.22web.org/difakepawipo.pdfIn PDF document text
    • https://finukezazilifer.weebly.com/uploads/1/3/0/7/130776017/noniwuvopavepa.pdfIn PDF document text
    • https://balebapu.weebly.com/uploads/1/3/5/3/135322653/rijukalukuvog.pdfIn PDF document text
    • https://japarikadag.weebly.com/uploads/1/3/4/1/134108792/vepararafatub.pdfIn PDF document text
    • https://cdn.sqhk.co/jenuluvonuz/eBSohce/dedazonitugekudewivas.pdfIn PDF document text
    • https://jotulamopusojo.weebly.com/uploads/1/3/4/4/134465369/regumigajesubu_xitek_kixefidimat_wufuretamu.pdfIn PDF document text
    • https://cdn.sqhk.co/rifasidajika/srlichh/engineering_gold_guide_bfa.pdfIn PDF document text
    • http://cozyplacefor.rest/davis_drug_guide_albuterolmf73a.pdfIn PDF document text
    • https://cdn.sqhk.co/kanemili/cYjhgjb/4237004410.pdfIn PDF document text
    • http://ita-yog.space/asperger_s_syndrome_survival_guide1w0mj.pdfIn PDF document text
    • http://microdigitalmeter.xyz/poema_de_lengua_indigena_y_su_traduccion_en_espaol3oyjc.pdfIn PDF document text
    • https://cdn.sqhk.co/nilesatu/brjache/deep_space_rush_trophies.pdfIn PDF document text
    • http://tuvawom.iblogger.org/92705901880.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://furexuzajob.epizy.com/tezoludixaj.pdfIn PDF document text
    • https://f2fffe36-c7b4-4b88-9608-518dc6c14750.filesusr.com/ugd/950b2a_943de9860f11484a934c5c1a67f68072.pdf?index=trueIn PDF document text
    • https://54570836-76ea-4100-b78f-d1ba4c3cc0d1.filesusr.com/ugd/21ac59_564f8066c53f47bcb33846bf64ad577b.pdf?index=trueIn PDF document text
    • http://xesijapapun.rf.gd/construction_company_profile_format_in_excel.pdfIn PDF document text
    • http://noxudovo.rf.gd/bushnell_telescope_manual_78-9669.pdfIn PDF document text
    • http://dojopugoput.epizy.com/22363998865.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010e65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E65 5404 bytes
SHA-256: 1d33c7ba4b1ba0361bff31f58cba798da86f8268922ceaa2ced46d1aaee7399d
font_01_sfnt_off000120b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120B6 11088 bytes
SHA-256: 54eba55e3821b145a047ffd51c4a74785b66fb9ad9ce2c94b7669c745bf8d35e

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