Malicious PDF — malware analysis report

Static analysis result for SHA-256 879a0a6a03ca98c0…

MALICIOUS

PDF

84.8 KB Created: 2021-03-17 01:52:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: c631cfb3cb9f8f899c83fca40e4d8381 SHA-1: 53ae31b441db4194d6e00a006e87e1b9d19a8fd7 SHA-256: 879a0a6a03ca98c0b6fd33c9ae68b8e2924b8983d47b6366fae18294dbf1d171
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 0.9997

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://vilenefex.ru/wix?keyword=springfield+education+association+oregon PDF link annotation
    • http://help-service-support.com/pevixuxugulobutojepaa1bhv.pdfIn PDF document text
    • http://moymagazin.xyz/brotherhood_imdb_parents_guidedl4bf.pdfIn PDF document text
    • http://100p-f.ru/lonely_planet_itinerary_japansvp7y.pdfIn PDF document text
    • http://vatetuda.scienceontheweb.net/10345724271.pdfIn PDF document text
    • https://xexajuxeleseg.weebly.com/uploads/1/3/4/5/134592224/leseb.pdfIn PDF document text
    • https://rovibabewovel.weebly.com/uploads/1/3/4/8/134884015/a0ab66ae0c.pdfIn PDF document text
    • http://digitalmicroteter.xyz/vidojagivutokojiridurabib57xjg.pdfIn PDF document text
    • http://znalomstvavip.site/is_trials_of_apollo_worth_readingdjf8v.pdfIn PDF document text
    • http://zawugexoj.22web.org/14748929819.pdfIn PDF document text
    • http://janurikemodowu.iblogger.org/koludobumode.pdfIn PDF document text
    • https://wufaderafezika.weebly.com/uploads/1/3/0/7/130776219/5ae914a85093.pdfIn PDF document text
    • https://gufofusubovara.weebly.com/uploads/1/3/5/3/135323195/1a0d44bf85.pdfIn PDF document text
    • https://vasetovomakoti.weebly.com/uploads/1/3/2/7/132741031/folilizawis.pdfIn PDF document text
    • http://boxberry-24.cc/coby_true_wireless_earbuds_cetw-511bvrf1.pdfIn PDF document text
    • http://www.oregoned.orgWhatIn 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://xakosafejel.epizy.com/24432010913.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d7458205-d637-4ae4-9c1d-f6db5381ab1e/which_of_the_following_statements_is_true_of_costs.pdfIn PDF document text
    • http://telenusu.epizy.com/gepomifozimopogas.pdfIn PDF document text
    • http://bototiluwoge.atwebpages.com/sharp_aquos_blinking_power_and_opc_lights.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/04105d7d-ccfc-4f1a-91a6-ed1c2525627e/jesetululutogidefedun.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3564b2fd-93a5-4724-916f-2dc8212a78f5/what_are_the_term_dates_for_2021.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_off0000ff51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF51 5308 bytes
SHA-256: da6b852d02eda666fa0cee21fb47f45ac916d6b14422a478d567519321bff65d
font_01_sfnt_off00011161.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11161 11172 bytes
SHA-256: dd4de6f3ba5cc45b110c0a8ad93db06dd1557a642cf5037a0f1fd002b02b870b
font_02_sfnt_off00013797.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13797 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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