Malicious PDF — malware analysis report

Static analysis result for SHA-256 58c02ebe461c504f…

MALICIOUS

PDF

73.4 KB Created: 2021-04-28 00:58:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 25b87bf75c265f28df40974a0fd52624 SHA-1: eeae13e5d8a29dba4d7ea1bc81ef24b5973df517 SHA-256: 58c02ebe461c504f3ba2b603335941b1d0de8291e097ea3a818146830b5921ae
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The presence of a URL related to 'streaming vf' further supports a lure-based attack. ClamAV and ML classifiers strongly indicate malicious content, likely a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 6

  • 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.
  • 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://druttle.ru/strik?utm_term=a+street+cat+named+bob+streaming+vf PDF link annotation
    • http://fodosokidorakig.22web.org/biodata_format_for_teaching_job.pdfIn PDF document text
    • https://nukoxola.weebly.com/uploads/1/3/1/3/131380146/kufizujenedamipabes.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4401546/normal_5ffb7ccf03387.pdfIn PDF document text
    • https://kotidirexi.weebly.com/uploads/1/3/4/3/134358756/8b68c9425fcf51.pdfIn PDF document text
    • https://devubavoxonor.weebly.com/uploads/1/3/2/7/132741482/sirafiveweruvilixok.pdfIn PDF document text
    • https://nadarikiwuxat.weebly.com/uploads/1/3/2/7/132712530/wikegepirobodatubalu.pdfIn PDF document text
    • http://xulenegutuwovi.iblogger.org/ambulance_uniform_epaulettes.pdfIn PDF document text
    • https://sasujenag.weebly.com/uploads/1/3/5/3/135337218/595972.pdfIn PDF document text
    • http://worameruvejaka.mywebcommunity.org/how_do_i_become_a_medical_assistant_teacher.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387718/normal_60268b902b66a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4506063/normal_5fcf0d3069fdb.pdfIn PDF document text
    • http://lezepubaj.iblogger.org/62530971307.pdfIn PDF document text
    • http://jebifawulu.mywebcommunity.org/troy-bilt_mustang_22hp_42_in._zero_turn_mower.pdfIn PDF document text
    • http://xumupizaxuto.scienceontheweb.net/23356376392.pdfIn PDF document text
    • http://wonozudobitisog.scienceontheweb.net/how_to_study_public_life.pdfIn PDF document text
    • http://kuvenumine.mygamesonline.org/anova_using_minitab.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://pepajefosub.epizy.com/identify_noun_verb_adjective_adverb_worksheet.pdfIn PDF document text
    • https://d1159ab4-cbf5-42eb-897b-83a5e94cd7da.filesusr.com/ugd/536122_05c3a6932368466ca756f2a4b6c85362.pdf?index=trueIn PDF document text
    • https://041aa876-b65b-432c-96c0-58c8b295a4e4.filesusr.com/ugd/90d19e_d88471a5f66542f180a7b086ee0bc5a4.pdf?index=trueIn PDF document text
    • http://kepofif.onlinewebshop.net/what_is_an_example_of_positive_and_negative_reinforcement.pdfIn PDF document text
    • http://bamusob.rf.gd/navigant_research_autonomous_vehicles_2018.pdfIn PDF document text
    • https://148d48ef-a78d-4e34-a4d2-755cfbac042a.filesusr.com/ugd/ccca9b_db66e9ca4afc431ab761854c874b4b04.pdf?index=trueIn PDF document text
    • https://efec373b-cb85-4617-95c0-ca1809d574ea.filesusr.com/ugd/9529b1_1f12b3e169684c289a6cb8635aadd9ae.pdf?index=trueIn PDF document text
    • http://nojikigor.myartsonline.com/10728119374.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d27e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD27E 5288 bytes
SHA-256: 30f1ad2ce1cc087bc82ad1f5bb3fd8a4d3a6e7c4b3994f9fa16f0aaca6304983
font_01_sfnt_off0000e45d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE45D 11120 bytes
SHA-256: 735e2d7abe1182a6272b209c2e1f0fcc872245b67945583eb7e64cb0426efe5e
font_02_sfnt_off00010846.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10846 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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