Malicious PDF — malware analysis report

Static analysis result for SHA-256 9137cf7bf90cb965…

MALICIOUS

PDF

79.8 KB Created: 2021-04-21 19:43:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: f0fff6420ed9fc87cb04f004b3f6aa5c SHA-1: de6e934fb8500fbcf5871ff71cdba761f52a4251 SHA-256: 9137cf7bf90cb965a2f280ca385f0ec18e60cc05b8c5260e3e8d9bcbf2a02b75
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 0.9997

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://resalured.ru/strik?utm_term=how+the+grinch+stole+christmas+musical+reviews+2018 PDF link annotation
    • https://bijafifevidajun.weebly.com/uploads/1/3/6/0/136051066/paxinekomimitat.pdfIn PDF document text
    • https://wuvonavozaf.weebly.com/uploads/1/3/2/6/132695620/vofuj.pdfIn PDF document text
    • https://tabureribe.weebly.com/uploads/1/3/0/8/130813037/7260222.pdfIn PDF document text
    • https://lanekugufer.weebly.com/uploads/1/3/5/3/135351315/5432808.pdfIn PDF document text
    • https://wuganinaviset.weebly.com/uploads/1/3/1/8/131871642/dipanijoguziwokaku.pdfIn PDF document text
    • https://tudimase.weebly.com/uploads/1/3/5/9/135985307/fezedozajug.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/kulinisokakewi/molijiki.pdfIn PDF document text
    • https://s3.amazonaws.com/fekife/aashiqui_2_movie_wallpaper.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/774762d3-db95-4b03-8667-8b6d254349a5/elbert_hubbard_quotes_goodreads.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6868d3a4-90a1-451a-8196-ecc2313dc86c/venoxoviwif.pdfIn PDF document text
    • https://s3.amazonaws.com/gofilafixu/30022576045.pdfIn PDF document text
    • https://s3.amazonaws.com/xugigabitulu/raravuwujoken.pdfIn PDF document text
    • https://s3.amazonaws.com/gedimuta/80952061236.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ab3edc6-5951-4ca7-a06d-eb6b50516852/brandon_sanderson_mistborn_book_2.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3267859a-b506-4330-9cca-6aa9c74aa83f/what_is_the_purpose_of_commedia_dellarte.pdfIn PDF document text
    • https://s3.amazonaws.com/sefukirexuwekij/26999671155.pdfIn PDF document text
    • https://s3.amazonaws.com/rakabexozu/lovatokirologodevi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/46a90e83-985b-4e08-ab92-bd1b0f17730e/vesodugil.pdfIn PDF document text
    • https://s3.amazonaws.com/feliso/86505376348.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e075959b-c336-45ce-8612-f92de9b11d37/derapit.pdfIn PDF document text
    • https://s3.amazonaws.com/xuvamuba/zogenofade.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_off0000f6d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6D1 5848 bytes
SHA-256: 747694e57faffdfde8e824df7d33055102ae18cedaba12bb258bc329b3f64f9a
font_01_sfnt_off00010aaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AAA 10908 bytes
SHA-256: ac2283f4572c1114f612ca86de75c203332811038cac266c141304bcc13f968c

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