Malicious PDF — malware analysis report

Static analysis result for SHA-256 447da192b0d36b64…

MALICIOUS

PDF

73.4 KB Created: 2021-04-04 20:18:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: ff8416c26d533fcfe4a3327c018d4689 SHA-1: c666f7ec87ce4d49af6fb7c3b0e5efde0785443c SHA-256: 447da192b0d36b64c0f4210f69f4203a265ab33d51b196693e3aebd2484b009d
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://maypoin.ru/strik?utm_term=xbox+remote+volume+not+working PDF link annotation
    • http://mejumafegebameg.mygamesonline.org/bsc_physics_lab_manual.pdfIn PDF document text
    • http://zagejudivavi.sportsontheweb.net/gst_annual_return_form_9_download.pdfIn PDF document text
    • http://larebalin.mypressonline.com/clinical_hematology_mary_louise_turgeon.pdfIn PDF document text
    • https://cdn.sqhk.co/zojixemem/hMiaaih/technology_education_college.pdfIn PDF document text
    • http://rotawafuwuno.scienceontheweb.net/81595303757.pdfIn PDF document text
    • http://povulofi.mywebcommunity.org/30600228683.pdfIn PDF document text
    • https://cdn.sqhk.co/zimuteraf/mheSih1/sheltered_definition_simple.pdfIn PDF document text
    • http://xebiniseba.mygamesonline.org/sujadifimiwakizutepenobif.pdfIn PDF document text
    • https://cdn.sqhk.co/topazawu/AjfRHQe/wiwosiluwajapuxobafur.pdfIn PDF document text
    • https://cdn.sqhk.co/lebudawojafi/EEgAZjc/bakersfield_californian_fishing_report.pdfIn PDF document text
    • http://gamowenugeg.sportsontheweb.net/nonprofit_bylaws_template.pdfIn PDF document text
    • http://obsluzhivanie-kompyuterov.moscow/697994292089gnug.pdfIn PDF document text
    • http://winwites.space/48282460675urabu.pdfIn PDF document text
    • http://hotita.space/soziwusikevufewoguwodusfkke.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/b1a01022-d565-41c8-a7c1-1065e8bb95e4/46332497973.pdfIn PDF document text
    • https://s3.amazonaws.com/jefazaxal/aap_se_milkar_free.pdfIn PDF document text
    • http://gubawakelu.onlinewebshop.net/tugojugedodomowapi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd2fda2d-df17-4463-8457-3645b6234f20/whats_better_gas_or_piston_ar_15.pdfIn PDF document text
    • https://s3.amazonaws.com/kulinisokakewi/3740458140.pdfIn PDF document text
    • https://s3.amazonaws.com/vuxagixil/sherlock_holmes_series_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fc15feca-36cb-43bf-9c11-01584765da9e/rexemapaxete.pdfIn PDF document text
    • https://s3.amazonaws.com/xotomisen/what_is_the_greek_root_word_for_measure.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/22c08574-a52d-4182-9476-4a567c8f24d9/mejuposi.pdfIn PDF document text
    • http://dowuvoduwitovos.atwebpages.com/ropusifufumeluronim.pdfIn PDF document text
    • https://s3.amazonaws.com/xoferuzu/lowes_1_2_sheetrock.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_off0000e27d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE27D 5016 bytes
SHA-256: 61f855ae1108884a7d9a6864ab4bed0b74edda20a4fe80fd889ae8aec53dca4d
font_01_sfnt_off0000f392.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF392 10548 bytes
SHA-256: 5702c680f966a21006df96e45b57cc2eddb30155639897f3cf36606100ca2e7e

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