Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc33b0d63549b16c…

MALICIOUS

PDF

84.4 KB Created: 2021-03-31 16:11:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1d9f867a56097b548aba16e752d860e4 SHA-1: 63702465175b1e881719e3fdd68ebe7029e56044 SHA-256: cc33b0d63549b16cc368cb927462dabde2026605352187d6adc6d56b2b599cc4
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one prominent URL pointing to 'kuzutuzo.ru' and a keyword related to 'mtd lawn mower parts manual'. This suggests a phishing or SEO spam tactic to drive traffic to malicious sites. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution.

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://kuzutuzo.ru/wix?keyword=mtd+lawn+mower+parts+manual
    • https://fofifiso.weebly.com/uploads/1/3/4/6/134613093/4403474.pdf
    • http://fidesuwuranotif.getenjoyment.net/sokakilejururi.pdf
    • https://gawudizilox.weebly.com/uploads/1/3/5/3/135300959/4cc1852f5b38.pdf
    • http://gekodejevotug.medianewsonline.com/62573460058.pdf
    • http://moxipafuxoxo.mygamesonline.org/kikoxudemizerotuvekatuwe.pdf
    • https://kefomituwo.weebly.com/uploads/1/3/2/8/132815939/3777049.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://3682d434-6e27-4ac8-9ac2-d3ec24fa429c.filesusr.com/ugd/9b5f63_604012ed19064b0bb6a4680ce43792c6.pdf?index=true
    • https://s3.amazonaws.com/wozowuledij/25671622393.pdf
    • https://6196a4e6-b3b5-4a85-a139-4ec84e0a53d9.filesusr.com/ugd/d01287_02fcdbd8caca4d869631f976ad5cb5de.pdf?index=true
    • https://4465b75e-e642-4f53-8c89-e22f0b9d4994.filesusr.com/ugd/ecd213_798569a24d21403e9f4effa80fef3b10.pdf?index=true
    • https://s3.amazonaws.com/dazinibonofobi/how_to_get_my_brother_printer_to_scan_to_my_mac_computer.pdf
    • https://s3.amazonaws.com/xujitezu/65718891877.pdf
    • https://4ef57e19-9a2e-4e6f-a444-f6b59f982a39.filesusr.com/ugd/4c1554_cbbd4c5fab8f4aa1909e1f285cac4966.pdf?index=true
    • http://ledufowi.myartsonline.com/asterisk_guide.pdf
    • https://s3.amazonaws.com/kovilowab/avira_antivirus_for_pc_windows_7.pdf
    • https://s3.amazonaws.com/kuxuxemu/8023481644.pdf
    • https://233b4d2f-9c44-4004-b776-098ebc281e6f.filesusr.com/ugd/7f980c_48c771ae88aa4f408fc649988c10c7f3.pdf?index=true
    • https://200ee3fc-349d-4871-b5c3-2c1c69b60476.filesusr.com/ugd/7b00a0_ae90ebf75d1042b1841c19f7deb30f05.pdf?index=true
    • https://9579f988-9383-433c-acf3-5fff76e0c882.filesusr.com/ugd/191a6d_c6108f89b2d74680a1578f02fad3acc3.pdf?index=true
    • https://s3.amazonaws.com/bitizopovopaso/ragupeniko.pdf
    • https://d2ffd92d-ad89-4e9b-8359-126286817a3c.filesusr.com/ugd/dd9784_374eadfa0093458db5d393618066ee81.pdf?index=true
    • http://sewujajapivix.onlinewebshop.net/minecraft_guides_wiki.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_off00010a6c.bin
392fe24c99e43f50c28b063d9af09e6a82085ec4429c308ba0d8ce1754b1c631		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10A6C 5204 bytes
font_01_sfnt_off00011c1e.bin
90ce154a306b3ba833c88b21ed81632cd83b2acadf193353024172a83fd3d3d0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11C1E 11228 bytes

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