Malicious PDF — malware analysis report

Static analysis result for SHA-256 052e74079eeca7eb…

MALICIOUS

PDF

68.2 KB Created: 2021-05-06 11:57:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: c9375f1fc03ffc5f0595d2898b44c461 SHA-1: 8c130cecf927c13f6ee8698422bc2a0d75dadb2c SHA-256: 052e74079eeca7ebc612aa3ef01c3076a6fe4b2b539bb4122ce5cfe0dd8d6aa6
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 0.9996

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://xajibur.ru/strik?utm_term=echo+srm+2300+carburetor PDF link annotation
    • http://fredo.run/negapunojozubozaw9b.pdfIn PDF document text
    • https://forugizatufuru.weebly.com/uploads/1/3/1/4/131410167/b88d4d88.pdfIn PDF document text
    • http://barberking.best/slaves_to_darkness_bookutyct.pdfIn PDF document text
    • https://cdn.sqhk.co/bopibege/fgfgjNn/fenuwujonigogugekugi.pdfIn PDF document text
    • https://cdn.sqhk.co/bureruverog/jbvrE6L/stylish_text_generator_symbols.pdfIn PDF document text
    • http://lofoporubatul.mygamesonline.org/examples_of_variables_in_research.pdfIn PDF document text
    • http://sidazolomaw.22web.org/gloomhaven_solo_items.pdfIn PDF document text
    • https://foboxujegi.weebly.com/uploads/1/3/4/6/134694162/dowujegirijuka-fodepukavevejis-matad-zisipimu.pdfIn PDF document text
    • https://cdn.sqhk.co/xubuzivo/foAujWg/zemabavefovevetolaza.pdfIn PDF document text
    • https://suzexefovewav.weebly.com/uploads/1/3/4/6/134640410/9483861.pdfIn PDF document text
    • https://cdn.sqhk.co/zetoreli/lghhjhi/super_bino_world_jungle_adventures.pdfIn PDF document text
    • https://ganuzuvotaju.weebly.com/uploads/1/3/5/3/135304652/44b0a224bcd2.pdfIn PDF document text
    • http://taxarigi.sportsontheweb.net/vikutolupevebozugum.pdfIn PDF document text
    • https://cdn.sqhk.co/fasotaluvose/p2jaicd/cat_warehouse_york_pa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://padusij.onlinewebshop.net/40592336010.pdfIn PDF document text
    • http://lusajafimaneru.myartsonline.com/hells_vengeance_maps.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0af0b2ed-da36-4fa1-8a61-ab8db463d148/hot_springs_prodigy_filters.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f35a4b91-1cf6-4150-b1ba-da2bd1b3f547/sat_practice_test_2017_answers.pdfIn PDF document text
    • http://xemigososefof.atwebpages.com/novel_outline_template_google_docs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/867f06c4-6056-42af-8263-225db2701a00/sisetewirumuji.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f19cf5ca-ad27-44ac-8a0f-dc8497153a2b/didenexufesakugekasul.pdfIn PDF document text
    • http://fububosuvakosal.epizy.com/chemdraw_software_free_for_laptop.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_off0000cbae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBAE 5544 bytes
SHA-256: 7055308c77852a5452517039da9e2ff97047fc39549f027b01f52812215a5da9
font_01_sfnt_off0000de56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE56 10908 bytes
SHA-256: 721d91f63244fc950b66dc491827f6042283d9a38eff6e30f4cef5c82c7571c4

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