Malicious PDF — malware analysis report

Static analysis result for SHA-256 3db7961c7b18b3cd…

MALICIOUS

PDF

85.3 KB Created: 2021-04-18 21:45:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 901f13f5bcc8c9d5729d66e20c44b246 SHA-1: 197460cbb8d1658d61734b4f8308af7adf8a7065 SHA-256: 3db7961c7b18b3cd477128810f3d20dadb5db8c1262322af38fb583fece973cb
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 0.9998

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://druttle.ru/strik?utm_term=what+is+project+management+in+healthcare PDF link annotation
    • https://cdn.sqhk.co/jovuvufoxet/h7B3Htf/vobiliniguzaviloka.pdfIn PDF document text
    • https://cdn.sqhk.co/xudadidi/1hFlgjE/75030230437.pdfIn PDF document text
    • https://cdn.sqhk.co/kuwusemob/CtgeAkE/xujugu.pdfIn PDF document text
    • https://cdn.sqhk.co/pixafosabow/gjf2igM/kexozijawud.pdfIn PDF document text
    • http://webuzudinu.iblogger.org/baskin_robbins_application_online.pdfIn PDF document text
    • http://womizepivilora.sportsontheweb.net/zexibu.pdfIn PDF document text
    • https://cdn.sqhk.co/tuzevawu/eUShQSf/zuzorugorobiroluzi.pdfIn PDF document text
    • http://gusevoxuzuwelap.mywebcommunity.org/ccrn_review.pdfIn PDF document text
    • http://pumorux.medianewsonline.com/antecedentes_de_la_contabilidad_electronica.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fasasipapuzu.rf.gd/ncert_biology_class_12_chapter_6.pdfIn PDF document text
    • https://s3.amazonaws.com/mixanaz/what_is_life_expectancy_according_to_the_bible.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c3078a37-ac7c-4fea-af5d-50c73bc41527/janudetapunuwirozoturav.pdfIn PDF document text
    • http://tifilow.onlinewebshop.net/dream_it_job_solution_book_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf8c5364-660b-4e08-9109-8bbfc0e34108/26317908499.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3bc6d020-05ac-46e6-862f-e7f2fceb555b/autocad_command_window_gone.pdfIn PDF document text
    • http://ribaxekag.epizy.com/airline_commander_apk_latest_version.pdfIn PDF document text
    • https://s3.amazonaws.com/medaliwifufugel/south_america_major_physical_landforms.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b328032-009d-4c25-9c53-5d6ef53e8945/vazipur.pdfIn PDF document text
    • http://panadokopejed.epizy.com/abhimaan_2016_full_movie_720p.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f86b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF86B 5436 bytes
SHA-256: 529efe4edbeaf4579717b1d4147ad2073a13ed8114972c9bc4323fe877e6caa5
font_01_sfnt_off00010ad0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AD0 11256 bytes
SHA-256: 04d18f236e858f931a87bb1b328fc786759caaf2860002584c874edeeb5ecbb2
font_02_sfnt_off0001313a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1313A 16060 bytes
SHA-256: 2173a1880e9f774f759393e7d0d28dda91d04d8a3eae6bea41b822770b343b90

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