Malicious PDF — malware analysis report

Static analysis result for SHA-256 9966baa427bf16ad…

MALICIOUS

PDF

71.6 KB Created: 2021-04-19 19:09:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-28
MD5: 1cb2afd28a1bd3bc2ef6db0d79bc67c7 SHA-1: 7d484fb03cdd7f175aadee8af7f59eae742e442e SHA-256: 9966baa427bf16ad8549c31e9a3f3a70b7c1916514028ca476517f73f4c7047b
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical finding for a link farm and a ClamAV detection for a phishing trojan. The embedded URLs, particularly the one pointing to 'kuzutuzo.ru', suggest a phishing or malicious redirection attempt. While no scripts were explicitly extracted, the PDF structure and link farm heuristic indicate an attempt to drive traffic to potentially malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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/strik?utm_term=kenmore+elite+smartheat+quiet+pak+9 PDF link annotation
    • http://raxewaponoxiv.mygamesonline.org/rojudataviviluvid.pdfIn PDF document text
    • http://fomijegi.mypressonline.com/wefosodijesusevedubesiruf.pdfIn PDF document text
    • http://wivevadevenumet.mywebcommunity.org/55497488171.pdfIn PDF document text
    • http://rowowesofazov.medianewsonline.com/82848150696.pdfIn PDF document text
    • http://latuha.com/xitojunozoledogixadizuvi2q8d8.pdfIn PDF document text
    • http://raffle.website/75719785755m7gqc.pdfIn PDF document text
    • http://winoorama.fun/wizijexisaluxiwuduvuwuyaci.pdfIn PDF document text
    • http://italystore.pro/chastiefol_form_6wz9fd.pdfIn PDF document text
    • http://tefitagesev.mypressonline.com/plate_and_frame_heat_exchanger_cost_estimate.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/badodemebo/55336782098.pdfIn PDF document text
    • https://s3.amazonaws.com/geraromu/adverbs_exercises_for_grade_6.pdfIn PDF document text
    • https://bbf05351-1c49-455c-8ea8-df349977a4d5.filesusr.com/ugd/15c6d6_5f91e457b29b49218a61248a5c1ed2b5.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/selivuvumepaveb/broan_allure_36_range_hood_filters.pdfIn PDF document text
    • https://s3.amazonaws.com/muvemasoxaji/polk_magnifi_max_protect_mode.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9b1091c0-0ff3-4786-82bf-787352601176/newenejiwudebupode.pdfIn PDF document text
    • https://627ea4a7-3f28-4bf3-8c99-6a9da7dacf48.filesusr.com/ugd/1970e2_963de8ac2c1341b4a1919336770ec73f.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/2a1c2904-a921-4b8e-9bf2-acf077c9bd3d/3345177042.pdfIn PDF document text
    • https://c0b8f06b-4e98-4d3d-89ef-2f08caba629a.filesusr.com/ugd/0c8cc8_0f2c31c0edba479b90cb896bd4e765b6.pdf?index=trueIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000db73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB73 5376 bytes
SHA-256: 3afb2ed2d6da2f85e2d8080a88110759a9e03eaa69c7a1e1076de3e481040dcf
font_01_sfnt_off0000ed8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED8C 10412 bytes
SHA-256: 89a37901311e3d5af8510a97588c83ba80126668a1ca7dbb893acc81ea0c7707

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