Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0e44ec6c8ecc328…

MALICIOUS

PDF

75.6 KB Created: 2021-03-19 13:02:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-28
MD5: eec6d1fcac14086d1203a2535e02d4e0 SHA-1: 5e833b9ec9dfbe04797817266708709f6a6821a3 SHA-256: f0e44ec6c8ecc328db4ab1bd59361f49fc50edfa2421bb2959b945b0efc5a348
126 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as 'Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0' and a machine learning classifier assigned a high probability of maliciousness. It contains numerous embedded URLs, with one prominent URL pointing to 'resalured.ru', which is identified as a link farm on disposable hosting. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the overall structure and URL analysis suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://resalured.ru/wix?keyword=akinari+persona+3+reddit PDF link annotation
    • http://businessoutsourcing.org/vikatubipotegixeviziwinse88.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471945/normal_604d051e25aea.pdfIn PDF document text
    • http://creditreportus.info/kewugevezopatidiren1wx01.pdfIn PDF document text
    • http://nicepics.xyz/xujojizusedesakotelel7klk.pdfIn PDF document text
    • http://wudaxozibutix.sportsontheweb.net/52070796585.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459640/normal_5fcf622aaecaf.pdfIn PDF document text
    • http://taxarigi.sportsontheweb.net/adventure_island_orlando_map.pdfIn PDF document text
    • http://lagulesuko.medianewsonline.com/sdgs_indonesia_2020.pdfIn PDF document text
    • http://bapulesaj.mygamesonline.org/dcouper_a3_en_2_a4.pdfIn PDF document text
    • http://googsnat.space/afcat_question_paper_2017_with_answersusb1t.pdfIn PDF document text
    • http://denizan.com/bts_love_yourself_answer_album_photosz91d6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a1d573e-fec1-4a35-b74b-9bea9d7dff42/mtd_rear_tine_tiller_gearbox.pdfIn PDF document text
    • https://s3.amazonaws.com/fajetufekejo/history_of_bond_market.pdfIn PDF document text
    • https://cd753cf5-d90a-4073-9c55-931a76e81761.filesusr.com/ugd/8826df_b5d990cee0c44fd7856826ce246cd797.pdf?index=trueIn PDF document text
    • https://f39f7cea-6337-46de-af4f-699959e6db0a.filesusr.com/ugd/004672_57ff4a26519342dd9f45ddcee695651f.pdf?index=trueIn PDF document text
    • https://ed36ca5d-e6e9-4caf-8bbb-3a8af5cfee16.filesusr.com/ugd/971556_0b056dd4d394470ba3219f3bc3dd33ba.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf0011a3-9b83-479c-bebb-663a03259bde/tono_del_poema_a_julia_de_burgos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9882e52d-3f36-4c88-a576-0a4bd0ec3943/how_to_pair_polk_soundbar_to_xfinity_remote.pdfIn PDF document text
    • https://s3.amazonaws.com/rodigapigeta/noluvaruxuki.pdfIn PDF document text
    • https://s3.amazonaws.com/feseni/56598945604.pdfIn PDF document text
    • https://7f3dc8b3-869c-44c5-82eb-14ae88d57796.filesusr.com/ugd/dc4ca1_a99ad49850bf4f3081b07a8f4676ce32.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/988e21bd-71a9-47cc-80b6-3adda086438d/el_diario_de_greg_2_pelcula_completa_en_latino.pdfIn PDF document text
    • http://lugimeviguv.myartsonline.com/78329053841.pdfIn PDF document text
    • https://s3.amazonaws.com/jiguwuzobozobaz/4_year_life_plan_template.pdfIn PDF document text
    • https://s3.amazonaws.com/lorifawuvawot/computer_network_topology.pdfIn PDF document text
    • https://5548a280-a194-4776-8019-0e256783c1fa.filesusr.com/ugd/f2c1dc_1a0493e2dafb4a0092001f6cd9c90dc4.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000da7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA7E 4532 bytes
SHA-256: 57a68197b54382a6f03f144a0b3dc1597280f84ed949dabaf3e7211daee16ee7
font_01_sfnt_off0000eaab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAAB 5136 bytes
SHA-256: 9c4a177e7c4d12ee75276182db0b40452bafbde6be91c1c55bcdae3836302934
font_02_sfnt_off0000fc30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC30 10632 bytes
SHA-256: 42dfdc906d05b92d4852136ea09592983e0193c0a5fe01feea29df612d0bf33c

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