Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2e857e22bfc3c3a…

MALICIOUS

PDF

94.6 KB Created: 2021-04-07 01:38:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: b57bb02f9e8b3d2712472d79d2f59157 SHA-1: 58b968023d2f837dc22d3302029d1177e769c1c2 SHA-256: b2e857e22bfc3c3aaedae73f7b27c9e965f6ce09d057ceaee6f29fbc7c8acbc4
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://vilenefex.ru/wix?keyword=earn+to+die+2012+part+2+unblocked+weebly PDF link annotation
    • http://b4shop.icu/angelic_symbols_and_meaningss3vc9.pdfIn PDF document text
    • http://nakozek.mypressonline.com/how_do_you_fix_a_coffee_maker_that_wont_brew.pdfIn PDF document text
    • http://consequences.space/libro_centrales_termicas_de_ciclo_combinadodnldz.pdfIn PDF document text
    • http://nigoguno.scienceontheweb.net/petition_for_grant_of_letters_of_administration_pa.pdfIn PDF document text
    • http://tonukavugu.mygamesonline.org/wuzepifaneja.pdfIn PDF document text
    • http://daxavepevepa.mypressonline.com/microplastics_in_the_ocean.pdfIn PDF document text
    • http://reggis.info/defending_jacob_endingkg0ll.pdfIn PDF document text
    • http://lestyprin.online/51909809295eybbz.pdfIn PDF document text
    • http://kukushpa.fun/how_to_prove_customary_international_lawyyb0e.pdfIn PDF document text
    • http://koxelovanalimu.getenjoyment.net/xubozotulinu.pdfIn PDF document text
    • http://narezekopalezi.iblogger.org/career_paths_electrician_express_publishing.pdfIn PDF document text
    • http://optarfes.com/nicolas_slonimsky_thesaurus_of_scales_and_melodic_patterns_downloadnof71.pdfIn PDF document text
    • http://afracheat2.xyz/fumunodiex5yy.pdfIn PDF document text
    • http://jewlgems.com/diamond_ring_shoppers_stopfayju.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/7d34a643-de32-4319-b3a2-460b385b5c7c/what_can_be_cooked_on_a_griddle.pdfIn PDF document text
    • http://najijojovigom.myartsonline.com/presentation_topics_for_students.pdfIn PDF document text
    • http://viminug.epizy.com/arbuscular_mycorrhizal_fungi.pdfIn PDF document text
    • http://risafusimuwo.rf.gd/47536109695.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc9ebfbc-665e-4c06-8b38-0a7adcae1032/georgia_drivers_license_renewal_appointment.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f186e5ea-201e-4b95-884f-360ffdd987f9/31637687367.pdfIn PDF document text
    • http://tunarijog.rf.gd/manual_de_adestramento_de_ces_gratis.pdfIn PDF document text
    • http://gototura.myartsonline.com/rufowila.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/058f4b20-6d8f-47e9-a232-4ef1f264b4e7/why_the_book_of_thomas_is_not_in_the_bible.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_off0001287f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1287F 5568 bytes
SHA-256: ebc5bd1c318281e1de7ab8485e8ceadd649088813270e6a979ddea84063d86fd
font_01_sfnt_off00013b98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B98 1728 bytes
SHA-256: 05ba77ced53a45c03d62239a62a6a5a540d3a44ff801edc3230990cf62cd2fb0
font_02_sfnt_off00014439.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14439 12156 bytes
SHA-256: 429f4e8e0db26e2f7febdc6443f07cda52858ca48c1ed271dfae6a48fe21febf

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