Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa281c9f9fb93dee…

MALICIOUS

PDF

82.1 KB Created: 2021-05-06 21:41:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: f527e3eaf485db267b62e3551b392c0b SHA-1: c723640d6e57008b81899a7f18c61dc827523286 SHA-256: fa281c9f9fb93dee82f27245eda3115d6041d8947f2440bc70df7fa016a08950
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 0.9995

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://jottigo.ru/strik?utm_term=myles+munroe+net+worth+2014 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4489045/normal_6015c00ad2198.pdfIn PDF document text
    • http://gratoraama.space/easy_geometric_string_art_patternsmc1au.pdfIn PDF document text
    • http://lusaxesa.iblogger.org/pollination_and_fertilization.pdfIn PDF document text
    • http://ch-bewertung-2888.xyz/xukilajezoraex0l.pdfIn PDF document text
    • https://cdn.sqhk.co/nogorodizet/4w6xjfL/32786953904.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366973/normal_6053278c82cc2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372963/normal_5fc60e2a2ddff.pdfIn PDF document text
    • http://gtomishebs.xyz/how_to_repair_frigidaire_affinity_dryer2c53s.pdfIn PDF document text
    • http://zowomojagobipur.iblogger.org/becoming_an_entrepreneur.pdfIn PDF document text
    • https://cdn.sqhk.co/zifiguwosu/iLjezDf/7613313679.pdfIn PDF document text
    • http://bewugexujiz.iblogger.org/jenuvajupelavanilanud.pdfIn PDF document text
    • http://kuxogajow.iblogger.org/functional_weight_training_at_home.pdfIn PDF document text
    • http://kijorifoweb.22web.org/ashampoo_photo_commander_14_free.pdfIn PDF document text
    • http://xujilutobidiko.iblogger.org/cyberpunk_2077_ps4_vs_ps5_comparison.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389097/normal_604d182e4425d.pdfIn PDF document text
    • https://cdn.sqhk.co/woledibiroju/c5vXRid/birthday_party_cool_ideas.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kurorasi.rf.gd/lenovo_g50-80_memory_upgrade.pdfIn PDF document text
    • http://zowomazo.epizy.com/26710941352.pdfIn PDF document text
    • http://fudedeki.rf.gd/admiral_car_insurance_policy_guide.pdfIn PDF document text
    • http://nonogopikizezed.rf.gd/pasipekijejedagisapi.pdfIn PDF document text
    • http://tuwaxakinob.epizy.com/19481159644.pdfIn PDF document text
    • http://jiwerefupuz.epizy.com/pesuf.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_off0000f3aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3AA 5328 bytes
SHA-256: 42803fb34a17dfa7f59b43934ab76fe1f8a8dfca40aaccaa2b69e681de5506d1
font_01_sfnt_off000105c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105C0 3516 bytes
SHA-256: a7c5a0f791288ec0e82f0b8f06c43e61ddceff2eebd082596a43887292e0244e
font_02_sfnt_off00011364.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11364 11088 bytes
SHA-256: 5d4d2a9980a96438a93ffeab931c3bba5e0d5df7ebe7e385892efd7e4813be78

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