Malicious PDF — malware analysis report

Static analysis result for SHA-256 117e1c627d910a12…

MALICIOUS

PDF

79.7 KB Created: 2021-05-29 01:16:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: c821e6d9f1c31d35122b0bc1158c36a4 SHA-1: 5126aae917dd25248271c9a1a10003c31b26ab62 SHA-256: 117e1c627d910a12a26f3ebd9c416e63a7ad16a39a68ca91ec83a31bf7df1be9
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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=plural+possessive+noun+grammar+definition PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4375342/normal_5fd18b47ed995.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494160/normal_5fd31a0f738cb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370265/normal_60074e65069c6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387825/normal_6027f5637f565.pdfIn PDF document text
    • https://lelamibi.weebly.com/uploads/1/3/0/7/130738841/gutugumosi-mejumejalij-donunuv-kosiluxeran.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485699/normal_602dfff82fb3a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482206/normal_601889ca37e56.pdfIn PDF document text
    • https://ziperivowupidu.weebly.com/uploads/1/3/1/3/131381589/5998878.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/9bc1fbc7-03de-40a6-9f40-5a40d81a067e/aashto_roadside_design_guide_2011.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bcf0efd6-652b-43f5-a5f0-a1f94f66aa90/dbx_286s_alternative.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a9a5ee3d-8032-460d-8ef0-1c706b063a1c/tizilemonabulevurivo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/51ce6066-70e3-4c64-9ef0-5d397acc84e4/uk_stock_market_opening_times_today.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/14f2dd53-af82-4d50-973f-5957f3d0f798/89154667068.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b9a656fd-6916-4983-bff9-392708ed042f/xenuziseniditise.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/95fdb3c8-f742-46b7-b5b9-7b8d45a9cfa4/luzepizigen.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e67f9d77-c096-4710-b5d2-b8bfa7c412c7/como_graficar_funciones_trigonometricas_tangente.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/41f4dc52-1050-4830-8e23-1782f3ecd7a5/how_do_we_interpret_the_bible.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aea928b8-42e5-48ad-a3b5-186f5df62daa/pivoxomelogivuxaki.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/32f3f09a-3690-4489-8d17-f3d7d2febe5b/continuous_tense_worksheet_for_grade_5.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d6492bd2-335a-497b-80bd-f25db0bc6a1c/how_often_to_change_oil_in_riding_lawn_mower.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_off0000f9c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9C8 5424 bytes
SHA-256: 967ab0fe8423e099ba857e40c6eaaeff6fa9909b38c889a9a927177a4acfcf9a
font_01_sfnt_off00010c2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C2D 10844 bytes
SHA-256: a608ba28c5dbba6a4d443d007578eba0a27ecd8db0098376bbfc07a795af0a0b

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