Malicious PDF — malware analysis report

Static analysis result for SHA-256 8560c9e094c18d70…

MALICIOUS

PDF

78.2 KB Created: 2021-04-24 18:00:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 0e72a39b80d41ffa6ca092a67e681674 SHA-1: 727d32eaadad2447525d05b0b5d6082623f2ecee SHA-256: 8560c9e094c18d70add61f61a4019afb4c1f210840bbce56d71a64c75e8b2e63
126 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs pointing to suspicious domains, flagged by heuristics as a link farm on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware delivery. The document body, though heavily obfuscated, appears to contain text related to search results or assessments, reinforcing the lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://dugedepap.ru/strik?utm_term=3+circles+answers+level+21 PDF link annotation
    • http://peludofnor.fun/google_cloud_project_ideas88r21.pdfIn PDF document text
    • http://fapasevusiledap.mygamesonline.org/cardiopulmonary_bypass_machine.pdfIn PDF document text
    • https://pukuxenusafo.weebly.com/uploads/1/3/4/7/134711282/1297493.pdfIn PDF document text
    • http://sallely.xyz/45821795498zl7ol.pdfIn PDF document text
    • https://xisuviwilizej.weebly.com/uploads/1/3/4/3/134320176/wibojen.pdfIn PDF document text
    • https://jekufagiz.weebly.com/uploads/1/3/0/7/130739150/japedonudirav.pdfIn PDF document text
    • http://buloshnaya.site/mapekapewosevaganipepsiek.pdfIn PDF document text
    • http://electrumwallet.buzz/planetary_annihilation_titans_mods_steamqkmxe.pdfIn PDF document text
    • http://vidclips.design/cfa_institute_level_2_exam_weightsohxqi.pdfIn PDF document text
    • http://rijoginijamibeg.mypressonline.com/81718179996.pdfIn PDF document text
    • http://smartcreditus.info/how_much_oil_does_a_new_lawn_mower_take5hfv1.pdfIn PDF document text
    • http://carishr.com/roman_numerals_chart_1_to_500cclwq.pdfIn PDF document text
    • https://zutupowetor.weebly.com/uploads/1/3/5/3/135350992/xuwirulamunutexidu.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/fajixe/indeed_assessment_answers_social_media.pdfIn PDF document text
    • http://rabatelekovufar.myartsonline.com/visorajigunu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eeb7d5ae-38c3-41c3-91b2-a2d6671f658e/suzuturisos.pdfIn PDF document text
    • https://s3.amazonaws.com/sojebelevenex/septic_tank_size_guidelines.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ab193e1-bf57-43a3-ba94-0181f10f0cbd/scott_pilgrim_vs_the_world_game_complete_edition_limited_run.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8bf485ec-0cf9-46ae-a9c4-66d106ba1801/fijes.pdfIn PDF document text
    • https://s3.amazonaws.com/pasawexawinogad/duxanaw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/38bb901a-4775-4c39-befe-26e673f4c5b4/the_book_thief_teacher_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/gomakobez/aortic_root_replacement_aha_guidelines.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_off0000f5ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5EF 5196 bytes
SHA-256: a6888f836b66bd2e07c6d45e41d46db9f5e57fc5ea381d388107367333890170
font_01_sfnt_off000107c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107C2 10388 bytes
SHA-256: 0f77165765a49649fd035b044dbbaf002f60a2bcf7c78eb3f85790b00394694e

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