Malicious PDF — malware analysis report

Static analysis result for SHA-256 e07ebfe17464e595…

MALICIOUS

PDF

120.3 KB Created: 2021-03-11 15:53:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 720cc179317f0168de33f02d3d3a4998 SHA-1: 9752d1ed1f9a06156989c90716cb45c8685f0cbc SHA-256: e07ebfe17464e5957e82f81fe61f48d489a0bfc6d9bc3528f5625599a3d780a7
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, as malicious. It contains a large number of external links, many pointing to PDF files, suggesting a link farm or a phishing lure. The primary malicious URL identified is https://soxebez.ru/award?keyword=al+khwarizmi+books+pdf. While no scripts were explicitly extracted, the PDF structure and the presence of numerous external links indicate a likely attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://soxebez.ru/award?keyword=al+khwarizmi+books+pdf
    • http://liwexun.mywebcommunity.org/gojatibidaxa.pdf
    • https://cdn-cms.f-static.net/uploads/4415518/normal_5fd88d0c9538d.pdf
    • https://bixikobitil.weebly.com/uploads/1/3/4/5/134525497/tixawelona.pdf
    • https://jiwebatije.weebly.com/uploads/1/3/3/9/133997557/gemug_nakusijuvasi_pirora.pdf
    • https://cdn.sqhk.co/pawekenu/apbxhgD/78709075230.pdf
    • http://zumanidoxup.medianewsonline.com/cardiopatia_isquemica_gpc.pdf
    • http://vitofemegawe.getenjoyment.net/gixipemeguvibunil.pdf
    • https://pogedufofow.weebly.com/uploads/1/3/4/5/134512351/b9e5e480ed7d.pdf
    • https://cdn.sqhk.co/jeforije/jcias7x/buddy_throwdown_nederland.pdf
    • https://venevivoxeda.weebly.com/uploads/1/3/1/8/131857756/sajijij.pdf
    • https://romarifekaxa.weebly.com/uploads/1/3/2/6/132683260/rodowakad_wefimebudem.pdf
    • https://xojowikenokux.weebly.com/uploads/1/3/4/7/134706662/tebuliruvumo.pdf
    • https://wivupenoremew.weebly.com/uploads/1/3/0/7/130775018/5904723.pdf
    • https://xuzubakew.weebly.com/uploads/1/3/0/9/130969304/tilowezeribis_guduna_kezazegum_nokifip.pdf
    • https://static.s123-cdn-static.com/uploads/4422640/normal_5ff3abc4841e1.pdf
    • https://jubipolofolexi.weebly.com/uploads/1/3/2/3/132302872/df478c3949544aa.pdf
    • https://gimogelego.weebly.com/uploads/1/3/4/6/134601730/bikasibexipiju.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://c46c713f-5e69-4c64-aad4-d86f29440f76.filesusr.com/ugd/957c7b_744b7d1cd1404043a1573de98f88c099.pdf?index=true
    • https://bb491b24-4c81-4ccc-8daa-bf1baeb171c2.filesusr.com/ugd/93c935_ed62fd73d1154f54816ffac91115564a.pdf?index=true
    • https://dc688580-c0ec-4ade-910b-7abffd870ab4.filesusr.com/ugd/096b61_64247cd8aa0f430f95bf5e5101af3f3e.pdf?index=true
    • http://supuwevul.atwebpages.com/jazak.pdf
    • https://a2876ee3-c470-454a-91e2-e108d831033a.filesusr.com/ugd/e8dba5_49158291199e422e8526850902e76d84.pdf?index=true
    • https://8d5bcf17-53f2-4f21-b585-7a27aef14131.filesusr.com/ugd/7baf93_929a6dacf9c34721ae4e2d844c5ebdaf.pdf?index=true
    • 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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0001ab3a.bin
fb982e23ecbddfc87e4fc9db8f8dea7feb417632046ddf9362d98044b5c50219		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1AB3A 23632 bytes
font_00_sfnt_off0001642e.bin
44465a6e688eda4b6dc60f3479e294cb66bec381d364b1e7d849e6dcaf4c7223		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1642E 5616 bytes
font_01_sfnt_off00017730.bin
710f6792ad2e9fd4fdd59243ca43d4e3f4e321c254296b84371a246628c95f13		 pdf-font-stream PDF embedded font (sfnt) at offset 0x17730 17176 bytes

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