Malicious PDF — malware analysis report

Static analysis result for SHA-256 45e466eacb5ba94f…

MALICIOUS

PDF

86.5 KB Created: 2021-05-05 16:37:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 13c4dc6d7d5f3dc7e3f3a9bd3d5da52a SHA-1: c4f32dee6f4b3ec37a4bf51818e5ee2de265dd6b SHA-256: 45e466eacb5ba94f6982d6cff81b78580ca5948f6f731fb6182607e2e1584250
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains numerous embedded URLs, many pointing to disposable hosting, and one specific URL is identified as a potential phishing or malware distribution point. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, appears to be a lure related to a definition, likely to trick users into clicking the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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://botokaw.ru/strik?utm_term=definition+of+mitotic+spindle PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4467571/normal_60344d1c15321.pdfIn PDF document text
    • https://lagomumudalo.weebly.com/uploads/1/3/2/6/132681699/961193.pdfIn PDF document text
    • http://manybigs.space/where_to_donate_used_toys_calgary0s475.pdfIn PDF document text
    • http://rbqjkwklnd.xyz/914138947103oqfy.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476011/normal_60158ca193417.pdfIn PDF document text
    • https://fovokifijinibe.weebly.com/uploads/1/3/4/5/134582558/todiz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490539/normal_5fdadae48d584.pdfIn PDF document text
    • http://deemonatrafik.xyz/desh_bhakti_songs_mp40hkpm.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365620/normal_604031b12006d.pdfIn PDF document text
    • http://bioforce-co.site/glacier_bay_faucet_repair_partss1f3a.pdfIn PDF document text
    • https://baxomowimesadud.weebly.com/uploads/1/3/5/3/135303612/gebupobufininorelume.pdfIn PDF document text
    • http://pevugaledaz.iblogger.org/84036266166.pdfIn PDF document text
    • http://about-central.com/75313527200lulb7.pdfIn PDF document text
    • https://goponubinolofuv.weebly.com/uploads/1/3/4/6/134695307/posibinarifabi_fisure_gexufas_vumedaliwor.pdfIn PDF document text
    • https://pudorexejuvaw.weebly.com/uploads/1/3/1/4/131455832/3256684.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://5548a280-a194-4776-8019-0e256783c1fa.filesusr.com/ugd/f2c1dc_1020fffeb17745ff9dbaa8c11dae336b.pdf?index=trueIn PDF document text
    • https://00f02ae0-031c-4cf4-85c3-86bbc6d7deb2.filesusr.com/ugd/13f2e4_203c42bc96ff4166b77da1df78b1f559.pdf?index=trueIn PDF document text
    • https://8772a198-af03-49ef-8724-5feb7546cb8a.filesusr.com/ugd/436f04_23b3a33e935d4970a1285dbb599c1489.pdf?index=trueIn PDF document text
    • http://galojuxutiwas.epizy.com/new_movies_telugu_audio_songs.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_off00011450.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11450 4992 bytes
SHA-256: d6e6c03f3cf77c18fdf22c7da50b94da8a30fb64625cbc7d47252c0667dac61a
font_01_sfnt_off0001254a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1254A 11672 bytes
SHA-256: ade1ba8871ea766c4c0b092f48de47e33409776c156410ac2ffd98de6bae1825

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