Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2b57cc528fab743…

MALICIOUS

PDF

99.6 KB Created: 2021-03-18 08:50:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a650f8f07d00449060fb6fe86bb659fd SHA-1: 74b627a7b6500e35a79dfde807bfa52bb1e94334 SHA-256: e2b57cc528fab743d0ffbfca035264d721f64813fcab0272c3ec2ca98157d08f
156 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, many pointing to Weebly-hosted PDFs, suggesting a link farm designed to manipulate search engine results. The primary URL, 'https://dafemum.ru/wix?keyword=the+age+of+reform+short+answer+questions+2017', is presented as a search result, indicating a phishing or content-luring tactic. While no scripts were explicitly extracted, the PDF structure and extensive link farm heuristic strongly suggest malicious intent, likely for distributing further malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://dafemum.ru/wix?keyword=the+age+of+reform+short+answer+questions+2017
    • https://vufobuvi.weebly.com/uploads/1/3/1/1/131163959/lekijufewavor-gakafavir-zoxojopegag-duwalebedez.pdf
    • https://vopemafewiza.weebly.com/uploads/1/3/1/4/131408930/4430261.pdf
    • https://sodikisug.weebly.com/uploads/1/3/1/4/131437766/f233257d.pdf
    • https://kebekeloku.weebly.com/uploads/1/3/4/6/134639455/jitininej-pasodisewo.pdf
    • https://bakofusu.weebly.com/uploads/1/3/2/3/132303024/6122378.pdf
    • https://votilolezin.weebly.com/uploads/1/3/4/3/134307270/gakadapobapos.pdf
    • https://xogofodaromaf.weebly.com/uploads/1/3/4/3/134387758/riwej.pdf
    • https://wolunogejafijut.weebly.com/uploads/1/3/4/6/134649672/3118245.pdf
    • https://livabawixegi.weebly.com/uploads/1/3/4/3/134320323/famujizanofif_dikunomugofew_kodatat.pdf
    • https://cdn.sqhk.co/papusabefo/fhhgdjb/xenodokonavokinopapi.pdf
    • https://lokuzovitopoz.weebly.com/uploads/1/3/4/8/134871506/gufiturujab_jibisoguxun.pdf
    • https://namodezax.weebly.com/uploads/1/3/6/0/136055978/9976928.pdf
    • https://cdn.sqhk.co/lazemowul/pyqgjAy/70808419084.pdf
    • https://ditomivowulute.weebly.com/uploads/1/3/4/6/134679561/e6fc2cc96dff.pdf
    • https://cdn.sqhk.co/tejosepu/gHgjwRt/27870922975.pdf
    • https://vuveporejar.weebly.com/uploads/1/3/2/6/132695394/2912960.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://4c72699b-aa2e-4dc8-8bd5-1a54e8f938a6.filesusr.com/ugd/f3cb45_4066ee07f0894fd8bea9f75f568b3c88.pdf?index=true
    • https://b6e49935-6d58-4bde-831f-6e0b746776d3.filesusr.com/ugd/7d321f_a61b35ddd731463c8c792c61021d818f.pdf?index=true
    • https://s3.amazonaws.com/tobojelusiwi/datofesom.pdf
    • https://973697ad-ffa4-4f9d-85cd-0c9d1ea039ee.filesusr.com/ugd/5f5755_76da37d6e8e34293b28baf3101670c30.pdf?index=true
    • https://s3.amazonaws.com/jezekemunidup/badhai_ho_badhai_akshara_song.pdf
    • https://s3.amazonaws.com/nonipesikiri/free_gradebook_template_excel.pdf
    • https://8271b8e8-1520-4b18-8785-2fafc8cd33e6.filesusr.com/ugd/efc97f_249cc16879ca4ef4a67c9b83a860d83e.pdf?index=true
    • https://s3.amazonaws.com/pipaneku/anti_malware_freeware.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_off00014750.bin
692db2449c657c800720823c28c92eaeaf5f6397ddaf32cb6a03762c0c5b6032		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14750 5720 bytes
font_01_sfnt_off00015ac4.bin
96c87207617e1cb376e7aeddafec755ce8861ecd1dcc422ca4176775483d1405		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15AC4 10976 bytes

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