Malicious PDF — malware analysis report

Static analysis result for SHA-256 17a64849fee36886…

MALICIOUS

PDF

80.2 KB Created: 2021-03-15 13:24:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 478a679a0ac4ae400ce30cd560561de7 SHA-1: 22bc6994597338a8a7bfa8315b4a7d171fe0f8df SHA-256: 17a64849fee368862a8612a8928221d6dcca8c5ec34e43df2a153d0390bd9fd8
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, identified as a link farm, suggesting a phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards the exploitation of users through deceptive content, likely leading to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://lozipotod.ru/wix?keyword=geometry+similar+polygons+worksheet+answer+key
    • http://helpforteam.com/laluwezikx6j6.pdf
    • https://bakogala.weebly.com/uploads/1/3/1/3/131384254/donuwuxepoxub.pdf
    • https://wefapewirevuvik.weebly.com/uploads/1/3/4/6/134667644/lofafesoguverer-kewimevufoz.pdf
    • http://wupofifaxixusi.66ghz.com/pilatenatowexeva.pdf
    • https://ramakizuwag.weebly.com/uploads/1/3/4/3/134321509/zuxepapuf.pdf
    • http://paypallsecurity.com/66252750015b89h8.pdf
    • http://sirosin.iblogger.org/54627583511.pdf
    • https://xovonugobo.weebly.com/uploads/1/3/4/6/134688771/wilubofitetar.pdf
    • https://cdn-cms.f-static.net/uploads/4418570/normal_6017a95a76cc9.pdf
    • https://bamigabimav.weebly.com/uploads/1/3/1/6/131636977/7fdf27ccd0c.pdf
    • http://rawiduti.medianewsonline.com/barron_s_ielts_strategies_and_tips.pdf
    • https://dutimuju.weebly.com/uploads/1/3/4/3/134334277/8186643.pdf
    • http://sale-siberian-force.online/95667680038o0ntt.pdf
    • http://lorakuze.sportsontheweb.net/26446528023.pdf
    • http://fenarumobajixu.22web.org/mevebow.pdf
    • https://tevoletefe.weebly.com/uploads/1/3/1/6/131606261/tonus-dawuru-pupule.pdf
    • https://vazexisosumufil.weebly.com/uploads/1/3/4/4/134465451/4672864.pdf
    • https://tixipatu.weebly.com/uploads/1/3/1/3/131382495/luzaz-rilibijop-mitofugelolakof-bugijizusepaz.pdf
    • https://rulotukipaka.weebly.com/uploads/1/3/0/7/130776525/8781674.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://bowumulupilad.epizy.com/dyson_dc25_animal_parts_diagram.pdf
    • http://kuzusegipo.rf.gd/65315891768.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eeb9.bin
9d71be5a97804d9dbc31b35d4d92c5462df369b2ffdbc795cbf81817a5b3d636		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEEB9 5308 bytes
font_01_sfnt_off000100b5.bin
c825e75aa3cd87bddb7266ff9de283fc5e877e938759632aed862a6e73c05036		 pdf-font-stream PDF embedded font (sfnt) at offset 0x100B5 10716 bytes
font_02_sfnt_off00012526.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12526 4324 bytes

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