Malicious PDF — malware analysis report

Static analysis result for SHA-256 40fe6b0542fb8895…

MALICIOUS

PDF

82.5 KB Created: 2021-05-22 16:51:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ac141306442c6a47d16df2cbeb9105a5 SHA-1: 0d650ee3b5fc4a0a76d4fc52a3770584818121af SHA-256: 40fe6b0542fb8895c2b21c2b92f6a9ab5efdee0581469ba118af8471face2ed8
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to Weebly-hosted PDFs, suggesting a link farm or distribution mechanism. The document body mentions a Craftsman saw recall, which is a common lure for phishing or malware delivery. While no scripts were directly extracted, the PDF structure and numerous external links indicate malicious intent, likely to redirect users to malicious sites for further exploitation.

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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://pepagefowajuna.weebly.com/uploads/1/3/4/7/134738543/384895.pdf
    • https://loneluripovulom.weebly.com/uploads/1/3/4/3/134364014/sizejajodov.pdf
    • https://vunafenivanisip.weebly.com/uploads/1/3/5/3/135303543/rajolinuxaku-jilisimitaximus-tulaf-gevufo.pdf
    • https://morewunopidov.weebly.com/uploads/1/3/4/8/134895133/dba601.pdf
    • https://fisujurij.weebly.com/uploads/1/3/1/4/131437504/bejegalexaxomad_lazoj_wuxon.pdf
    • https://mubelumovetofap.weebly.com/uploads/1/3/1/8/131856402/409360.pdf
    • https://modatubegawaso.weebly.com/uploads/1/3/4/4/134491319/4b2a55b9c2.pdf
    • https://gavebinakufir.weebly.com/uploads/1/3/2/3/132302735/613323.pdf
    • https://ketafimevudo.weebly.com/uploads/1/3/1/6/131637081/520d7e8b62f6385.pdf
    • https://lobuponumabezi.weebly.com/uploads/1/3/4/5/134508668/jazulepi.pdf
    • https://lidovoji.weebly.com/uploads/1/3/4/3/134313359/wazigap.pdf
    • https://guvolobojifo.weebly.com/uploads/1/3/4/7/134733869/bosujebijonujokuri.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://feedproxy.google.com/~r/wb/ENAH/~3/G1IkLG9TFNM/wb?keyword=craftsman%2010%20radial%20arm%20saw%20recall%20parts
    • https://s3.amazonaws.com/mexavofezoxi/xajebexovijixeg.pdf
    • https://s3.amazonaws.com/fapaga/67248157322.pdf
    • https://s3.amazonaws.com/tulosa/xufejaxemuvovajul.pdf
    • https://s3.amazonaws.com/foneniz/how_to_say_torah_in_hebrew.pdf
    • https://s3.amazonaws.com/midizaxopazeji/50_shades_of_gray_soundtrack.pdf
    • https://s3.amazonaws.com/nuxomigo/9750012005.pdf
    • https://s3.amazonaws.com/vifusupegiza/31907296862.pdf
    • https://s3.amazonaws.com/dezajok/los_100_verbos_mas_comunes_en_ingles.pdf
    • https://s3.amazonaws.com/veraxawewib/carry_on_bag_policy_spirit.pdf
    • https://s3.amazonaws.com/gotijejaj/chronology_report_format.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010395.bin
56108e233abb2d8e13c677c186b038bb3c0f16f0350a9075bfc24673bba7ffb0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10395 5492 bytes
font_01_sfnt_off00011643.bin
77191075bba98dc64093d3cca11c4379b3dd191456a715d0c38045c5c0002914		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11643 11252 bytes

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