Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d0adea4b2f9ac20…

MALICIOUS

PDF

80.1 KB Created: 2021-04-05 14:01:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 3007bc98d19b441006c96b23c05ced90 SHA-1: 5a4992d10af561155e8be6e57fa08d23bafaf712 SHA-256: 0d0adea4b2f9ac2021c2565e536bc06cc4adbadc0a52b32325a61ff4f5d960e5
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains numerous embedded URLs, with a primary one pointing to 'xezojetit.ru', suggesting a lure to a malicious site. The document body, though heavily obfuscated, contains keywords like 'Worksheet atomic theory' and application metadata, which are likely used to disguise the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://xezojetit.ru/wix?keyword=worksheet+atomic+theory PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4475588/normal_60433fffcf6bd.pdfIn PDF document text
    • http://jobware.pro/63789987249ljoql.pdfIn PDF document text
    • http://fajamad.mypressonline.com/tokenapuxula.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459624/normal_603efa53729f4.pdfIn PDF document text
    • http://nesobaka7.xyz/t_maxx_2.5_rpm_bumperoibm9.pdfIn PDF document text
    • http://allostar.buzz/abc_iview_appcjgly.pdfIn PDF document text
    • http://item-get.top/82884182206suxhb.pdfIn PDF document text
    • http://ginalupajeriw.scienceontheweb.net/brushless_dc_motor_drive.pdfIn PDF document text
    • http://filozajerezabi.getenjoyment.net/nutricion_parenteral_en_recien_nacidos.pdfIn PDF document text
    • http://koxudizujan.mywebcommunity.org/libro_chopra_cadena_de_suministro.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/tolivajupeku/hp_elitedesk_800_g1_sff_specs_i7.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e9a2f3d6-e49c-4d3a-a1cd-51ae622d7788/4663653888.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9a41774d-0ca2-4977-8b08-445066ec0ae3/smart_ups_1500_battery_pack.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/485d7a9e-2efa-4ddf-9a48-df4b5379361a/17622234730.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db884737-2fa1-4ecb-9384-535eb9092e7d/star_wars_collapse_of_the_republic_amazon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/60c43e39-b84d-4416-a7a2-b5dc93cf2aa9/what_to_do_in_the_first_90_days_as_a_new_manager.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c801621f-3c2f-4854-9f68-0e60fd774532/67035302215.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f56c850f-399a-431c-a477-3933d456660a/can_humans_detect_magnetic_fields.pdfIn PDF document text
    • https://s3.amazonaws.com/sonutopexaramuf/print_exercise_14_microscopic_anatomy_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fdecad31-03af-43e0-8d42-ec3dc3986be0/kaithi_movie_screenplay.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fb4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB4D 5188 bytes
SHA-256: e5ec080de3ff1ea641a8e6fe52ea81a7aa1f754eb092cff7492419b3bdfce8ff
font_01_sfnt_off00010cdc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CDC 11340 bytes
SHA-256: 58318878f6850d74e5eea6a5720256359290bd068242ca18ca0c2681fe79ca08

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