Malicious PDF — malware analysis report

Static analysis result for SHA-256 90be65d142a75b1b…

MALICIOUS

PDF

74.1 KB Created: 2021-03-18 11:39:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 06b8402176722706a546965c39c98686 SHA-1: 8b384724371306bcc59d6f50897ba937c8c137d9 SHA-256: 90be65d142a75b1bc082fff54fe324833399981134a08b4b25a89933f7336bb8
126 Risk Score

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://mezovuduw.ru/wix?keyword=love+can+build+a+bridge+chords+cher PDF link annotation
    • http://muzhskoizhurnal.ru/ruxubulafavawesewexo6j7o.pdfIn PDF document text
    • http://fekowepiz.mywebcommunity.org/holmes_heater_fan_hfh2986.pdfIn PDF document text
    • http://ipai.online/modo_condizionale_e_congiuntivo_del_verbo_esserealiak.pdfIn PDF document text
    • http://lewijufe.sportsontheweb.net/almanach_tajemna.pdfIn PDF document text
    • http://prizinsta365.online/59384272872f4mva.pdfIn PDF document text
    • https://mogijoduvide.weebly.com/uploads/1/3/0/8/130814471/2260077.pdfIn PDF document text
    • http://cz-nitrof.website/casio_forester_watch_manual8r67q.pdfIn PDF document text
    • http://letabumo.getenjoyment.net/zazimerovijifuxopufipun.pdfIn PDF document text
    • http://zebiripu.mygamesonline.org/english_grammar_diagnostic_test.pdfIn PDF document text
    • http://silewugebed.scienceontheweb.net/59684987113.pdfIn PDF document text
    • https://xaziribubeka.weebly.com/uploads/1/3/4/3/134397614/2770770.pdfIn PDF document text
    • http://raguvigawak.mypressonline.com/walonanafatemuji.pdfIn PDF document text
    • http://japamawosoj.mygamesonline.org/ancient_greek_religion_a_sourcebook.pdfIn PDF document text
    • http://ru-1.casa/lady_midnight_book_2eu93b.pdfIn PDF document text
    • http://wewogokuwidu.mywebcommunity.org/what_did_scarlett_ohara_say_at_the_end_of_the_movie.pdfIn PDF document text
    • https://vipoferizapil.weebly.com/uploads/1/3/5/3/135346342/lusiwamexamewaweku.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tarepos.onlinewebshop.net/biology_project_topics_for_class_11.pdfIn PDF document text
    • http://duvodix.myartsonline.com/bostitch_floor_nailer_model_m111_manual.pdfIn PDF document text
    • https://e8c82854-2a0b-4c0f-82de-bac600ce06e6.filesusr.com/ugd/d017d5_49ba715fbb764c9092c74bad686f4c9e.pdf?index=trueIn PDF document text
    • https://f3dc8d0a-397f-4303-99a5-a7927e83d850.filesusr.com/ugd/e916cf_55f075e68d4d4007b76dda1e4ce2e669.pdf?index=trueIn PDF document text
    • https://78f5967e-1348-44d0-b43d-4fba71d4c3e7.filesusr.com/ugd/a94f6a_a1f4de7ac0074822a6e3766e5b5ecad4.pdf?index=trueIn 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_off0000e248.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE248 5344 bytes
SHA-256: d8520a92f938d6d168e0033372902bc396b0201800902671c54d68bfcf589497
font_01_sfnt_off0000f46e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF46E 11248 bytes
SHA-256: 2bea918a953e2a00755faa5b9a161c400915fe2d879bffcdae7383582c56e8b1

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