Malicious PDF — malware analysis report

Static analysis result for SHA-256 da55278465f80486…

MALICIOUS

PDF

71.3 KB Created: 2021-02-19 13:47:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: ee76bf2e4f32601fb1e3a272957895ff SHA-1: dd18cb0c085401bc8f0a61efef56b595b2d01ed6 SHA-256: da55278465f804864cb9943788715651800045d38a33c91579a55ecc4ccb9d54
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/wix?keyword=codehs+answers+activity+1.12.4 PDF link annotation
    • https://cdn.sqhk.co/zuxosutuku/gjaNPBC/super_bubble_spinner_bubble_shooter.pdfIn PDF document text
    • https://lufumapapolag.weebly.com/uploads/1/3/4/3/134353855/3714818.pdfIn PDF document text
    • https://dolibaradodusop.weebly.com/uploads/1/3/4/5/134595809/3e546.pdfIn PDF document text
    • https://cdn.sqhk.co/napumefu/PSheejb/lego_31088_deep_sea_creatures_lego_creator.pdfIn PDF document text
    • http://fotogodopuxet.iblogger.org/tijutazo.pdfIn PDF document text
    • https://cdn.sqhk.co/tumosirewuw/6WQggTL/57799029639.pdfIn PDF document text
    • https://cdn.sqhk.co/pigajifaw/gdkBOzr/meme_stickers_for_whatsapp_wastickerapps.pdfIn PDF document text
    • https://cdn.sqhk.co/narulaloro/5gcjbhc/ninja_coffee_bar_manual_cleaning.pdfIn PDF document text
    • http://sewototenovaro.iblogger.org/avs_video_editor_tanpa_watermark.pdfIn PDF document text
    • https://cdn.sqhk.co/wisaputal/hjUVIX0/rugured.pdfIn PDF document text
    • https://wedidosav.weebly.com/uploads/1/3/1/6/131637371/rijonewabojokoj.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zipoxibel.epizy.com/thomas_calculus_book_11th_edition.pdfIn PDF document text
    • https://s3.amazonaws.com/faduxodiwo/archer_c7_v2_firmware.pdfIn PDF document text
    • http://mapakipoborepuj.epizy.com/correlating_rock_layers_using_index_fossils_worksheet.pdfIn PDF document text
    • http://xetumerim.rf.gd/39885301613.pdfIn PDF document text
    • http://jobifizokugo.rf.gd/ithildin_poem_answers_minas_ithil.pdfIn PDF document text
    • https://s3.amazonaws.com/donarepemi/hospital_de_alta_complejidad_formosa_telefono.pdfIn PDF document text
    • http://wutopow.epizy.com/main_and_helping_verbs_worksheet_with_answers.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_off0000cf0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF0F 5460 bytes
SHA-256: 9ab2dee3a9d567d411286bc7901cbb677dea259326598dbe0e9058a2709f5b78
font_01_sfnt_off0000e1c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1C0 14892 bytes
SHA-256: a40b31ecb67f0ce8c5298f89a5e9ee524dcfa1860798afcca1a05a62ddb21c70

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