Malicious PDF — malware analysis report

Static analysis result for SHA-256 e44e20793ee3077a…

MALICIOUS

PDF

140.0 KB Created: 2021-04-05 03:30:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 1f4b7d0a3daacf9446ca0e9525c50659 SHA-1: 1b17a0f0ec8db236c63cb4b000f8c5995568364e SHA-256: e44e20793ee3077a888e709013cf3d489a81777790677962ffe8a215e526453c
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one heuristic specifically identifying a 'PDF link farm' designed to direct users to various PDF documents. The embedded URL 'https://pelibifir.ru/award?keyword=input+file+accept+pdf+and+image' suggests a lure to a website that may host malicious content or phishing forms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9860

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://pelibifir.ru/award?keyword=input+file+accept+pdf+and+image PDF link annotation
    • http://kepopuxididavez.22web.org/kogixenijiluligi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391621/normal_600482be9e58d.pdfIn PDF document text
    • http://pewekelexu.mygamesonline.org/kagan_cooperative_learning_book.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449629/normal_602178b52fbac.pdfIn PDF document text
    • http://kopuvimu.scienceontheweb.net/70138215836.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378853/normal_60427fb6ddd95.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367911/normal_604635abe3282.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450746/normal_6054938430310.pdfIn PDF document text
    • http://sefobadivura.iblogger.org/46969761084.pdfIn PDF document text
    • http://www.dengzhr.com/frontend/1059In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://milebulijulami.onlinewebshop.net/24698973683.pdfIn PDF document text
    • https://60f6da8c-824c-4163-aae9-6195f2ac7ed4.filesusr.com/ugd/7f16bd_2b8ca8220e1b48b687cce09aff7d933a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/povelenavuviw/total_quality_management_hotel_example.pdfIn PDF document text
    • https://s3.amazonaws.com/gumagabu/dr_simeons_pounds_and_inches_manuscript.pdfIn PDF document text
    • https://s3.amazonaws.com/farowug/centrifugal_pump_handbook_free_download.pdfIn PDF document text
    • https://5c06e36d-e6a7-492f-989e-88f86e9ca1b1.filesusr.com/ugd/c9ae65_effeb063af9a4ecba774b3a917f34e83.pdf?index=trueIn PDF document text
    • http://vujapoguxesak.myartsonline.com/syntactic_categories_and_grammatical_relations.pdfIn PDF document text
    • https://s3.amazonaws.com/lorugipopuxe/39952536936.pdfIn PDF document text
    • https://9ef77391-fdd1-48d8-ba15-364b07375333.filesusr.com/ugd/ebefdf_5d7f18d3decd446c9747d1b6398ce7e0.pdf?index=trueIn PDF document text
    • https://315736c7-1030-4200-8d24-05c9f4951019.filesusr.com/ugd/d19ca0_cbe5bea7395b4fb6a9dd197dd76b69c8.pdf?index=trueIn PDF document text
    • http://tojuzogip.myartsonline.com/present_perfect_and_past_simple_exercises_autoenglish.pdfIn PDF document text
    • https://s3.amazonaws.com/sedimeraxufi/openvpn_android_settings.pdfIn PDF document text
    • http://sezajebufixi.epizy.com/attendance_allowance_form_notes.pdfIn PDF document text
    • https://1ac5d900-0c69-4f12-8b1d-4e209472b8d2.filesusr.com/ugd/828753_6eac018e4264460cab73c2e7d4be06d5.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dixaleko/international_law_firms_in_houston.pdfIn PDF document text
    • https://s3.amazonaws.com/dojonuta/vatafelogerusow.pdfIn PDF document text
    • https://s3.amazonaws.com/lumixi/79313478467.pdfIn PDF document text
    • http://samepuwewar.rf.gd/7333181756.pdfIn 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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f73c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF73C 73352 bytes
SHA-256: e6db4ee66f0dcebef2801a75e26074ab402a91ddab5c8d6d639575434c2f1221
font_01_sfnt_off0001d2fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D2FC 5140 bytes
SHA-256: 056fe1d49336fa31dcbb3833855af3318cf9fa52d957b9b642ee0469af5634d4
font_02_sfnt_off0001e46f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E46F 11280 bytes
SHA-256: 5d0f244aa8fdb32f992fec031751b4a62e0da1fd0d0885867758f46ae3518fc9
font_03_sfnt_off00020af6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x20AF6 16036 bytes
SHA-256: 52db30b66cfb76898988bc7c6ed152514c301740808ab95bec9c68e49df23550

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