Malicious PDF — malware analysis report

Static analysis result for SHA-256 c02681dfa31d4574…

MALICIOUS

PDF

117.1 KB Created: 2021-03-20 09:37:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: d5b1275ce46592247e1fe4b07cdc2911 SHA-1: 233e45dd00c4620c002c15ee245067ba4002de15 SHA-256: c02681dfa31d457422ac714fa338f13a43fce465e1144ebd5ec6aeba2c4a00c9
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 0.9985

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://baarspo.ru/award?keyword=agrarian+revolution+in+britain+pdf PDF link annotation
    • https://ligiponofejejo.weebly.com/uploads/1/3/4/3/134346234/6126340.pdfIn PDF document text
    • https://cdn.sqhk.co/tubadaluzafu/PUqHidC/33583422131.pdfIn PDF document text
    • https://cdn.sqhk.co/fuwuwoki/gzBEMFk/antibiotic_for_common_dental_infections.pdfIn PDF document text
    • http://kobopez.mygamesonline.org/boarding_houses_act_2020.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462694/normal_5fccf89a5f6a1.pdfIn PDF document text
    • https://zadidiboz.weebly.com/uploads/1/3/5/2/135295834/1442997.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388841/normal_604da79c8cf9f.pdfIn PDF document text
    • http://xufamorazogubov.sportsontheweb.net/family_tree_worksheet_spanish.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412378/normal_5fe1f9d25b2d0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380682/normal_603b938116803.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408704/normal_603c430013d74.pdfIn PDF document text
    • http://jipolavex.medianewsonline.com/kovedagewo.pdfIn PDF document text
    • https://cdn.sqhk.co/muwazubivotu/mbgiiiD/3245352795.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489844/normal_5ff717775f937.pdfIn PDF document text
    • https://cdn.sqhk.co/dusawugivepo/Xij2zhi/rokujaro.pdfIn PDF document text
    • https://bemagage.weebly.com/uploads/1/3/4/5/134525224/90c8127aef75.pdfIn PDF document text
    • https://cdn.sqhk.co/bepotedaxus/hHjaxgh/no_script_html_template.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375087/normal_604cb401755d6.pdfIn PDF document text
    • https://komamizidunip.weebly.com/uploads/1/3/1/4/131437982/7807656.pdfIn PDF document text
    • https://mexarufuwusa.weebly.com/uploads/1/3/4/5/134599415/pavigibux.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454562/normal_60145dfc24391.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://fuluxewamotate.atwebpages.com/alfabeto_arabe.pdfIn PDF document text
    • http://pimoxonevuwewax.atwebpages.com/61029694447.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_off000180bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x180BF 5104 bytes
SHA-256: 649432c4364e972eb4b49202795f7b544ee9a4567a60afafabf2ce6fc4473ee6
font_01_sfnt_off00019227.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19227 11140 bytes
SHA-256: b7dc42f69bc98ba196858261bfe618d757322c94a1a58b72838cd67e262ba24a
font_02_sfnt_off0001b81c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B81C 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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