Malicious PDF — malware analysis report

Static analysis result for SHA-256 94c1f43aefedad8f…

MALICIOUS

PDF

82.7 KB Created: 2021-03-20 00:13:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 94493fbc23e054caaca39c880c69b240 SHA-1: 043538531837928f002d57fc8c66cfc4c0263e23 SHA-256: 94c1f43aefedad8f34c1a434129297e305b4a7b4827dd4dc0b06b6eb640e5fde
126 Risk Score

Malware Insights

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

The sample is a PDF document that contains numerous embedded URLs, many of which point to disposable hosting or link farms, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document, likely designed to redirect users to a compromised site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

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://gimoguvi.ru/123?utm_term=nuvaring+user+guide PDF link annotation
    • https://cdn.sqhk.co/baxorurifina/gdhHicR/windows_7_keyboard_control_key_stuck.pdfIn PDF document text
    • https://cdn.sqhk.co/zoluwumenad/iieifhn/broken_bones_compilation_2020.pdfIn PDF document text
    • http://xikofav.iblogger.org/nirorokudagexedenosuwulo.pdfIn PDF document text
    • https://cdn.sqhk.co/mujexoxa/hbjdjhZ/the_best_colors_to_wear_during_summer.pdfIn PDF document text
    • http://xofenejilomoz.iblogger.org/project_management_closeout_report.pdfIn PDF document text
    • https://cdn.sqhk.co/sejixikerut/WWmY2yQ/ballet_at_home_for_beginners.pdfIn PDF document text
    • http://zuwixegugul.22web.org/architectural_draftsman_job_description.pdfIn PDF document text
    • http://pajebunekelisom.22web.org/sword_art_online_progressive_manga.pdfIn PDF document text
    • http://topijakalez.22web.org/aashiqui_2_video_song_1080p.pdfIn PDF document text
    • https://cdn.sqhk.co/nakusunegud/hhEgiiM/zanazoz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dimarujevetuvif.epizy.com/beethoven_biography_worksheet.pdfIn PDF document text
    • http://supidanerij.epizy.com/infrastructure_architecture_design_document_template.pdfIn PDF document text
    • https://s3.amazonaws.com/pafexegud/webobovaxudekezezepusata.pdfIn PDF document text
    • http://genenapukiral.epizy.com/neutrino_and_antineutrino.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/69ced662-c462-4f90-a38b-6002c4244e1d/white_christmas_tree_ideas_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/gatazeromij/woretuponu.pdfIn PDF document text
    • https://48cc712b-de5e-493e-a198-f8962849e22b.filesusr.com/ugd/d2751c_6abba6e7808d49109ff5b62c4854fde7.pdf?index=trueIn PDF document text
    • http://napilidowolaro.rf.gd/civ_6_macedon_guide_rise_and_fall.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/41c348e4-c10d-452e-8046-f5c813ffd376/balanapawad.pdfIn PDF document text
    • https://s3.amazonaws.com/punurum/xodeporumubumem.pdfIn PDF document text
    • https://s3.amazonaws.com/fogibi/afcat_2019_exam_syllabus.pdfIn PDF document text
    • http://zunakaduwuba.rf.gd/what_can_i_eat_on_hcg_phase_1.pdfIn PDF document text
    • https://21a67f6d-2aea-439f-a910-ed4feb6be009.filesusr.com/ugd/173616_7b428e95eff244ac8f43259c02c1e1a1.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/litunux/fobor.pdfIn PDF document text
    • https://11ca5eb4-0abe-4d5d-8073-3f36f6088e80.filesusr.com/ugd/8b62d8_c552b7e01426402787b34e229695a23e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/7daf3b25-3bcd-4daa-815d-f4637ffb7d8a/wujuxidanomutajosejates.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_off000107fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107FA 4992 bytes
SHA-256: 32564e535429d68bd4f1a61d18dbf88679a5e9320b9482ce27c616148872cedf
font_01_sfnt_off0001190a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1190A 10636 bytes
SHA-256: a79f429d91bd02173add5329457a1303bf0cc8440b8b64e9ad4b1885bfe023fc

Open this report in the interactive analyzer, or submit your own file for analysis.