Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7270f6a009e415b…

MALICIOUS

PDF

108.7 KB Created: 2021-04-01 20:08:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: eebc4218dc33b49878a09dcbaa352c56 SHA-1: 74bffa83d67dccefec0891fb6e76f8429f3a2476 SHA-256: d7270f6a009e415bfdd4879a81f17bcb8895b48c4ae4564adffffb8f949b104e
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://pelibifir.ru/wix?keyword=ernst+schumacher+small+is+beautiful+pdf PDF link annotation
    • https://xegezegev.weebly.com/uploads/1/3/2/6/132683484/lebelilolik.pdfIn PDF document text
    • https://cdn.sqhk.co/segenapiza/ayfjf7N/63651797684.pdfIn PDF document text
    • https://cdn.sqhk.co/bebofuwe/jjhdjjF/rush_hour_2_samurai_swords.pdfIn PDF document text
    • https://cdn.sqhk.co/dolubivo/W0MoSBk/zanali.pdfIn PDF document text
    • https://cdn.sqhk.co/xurazegoba/yZpvifO/catan_pieces_dimensions.pdfIn PDF document text
    • https://tigidejuremu.weebly.com/uploads/1/3/4/5/134502839/fa4ec32.pdfIn PDF document text
    • http://guwusovonolus.iblogger.org/masis.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/7ae64989-8432-4cc3-b511-e28945160ab4/75360880890.pdfIn PDF document text
    • http://tukorokibenej.epizy.com/big_fish_and_begonia_qiu_quotes.pdfIn PDF document text
    • https://s3.amazonaws.com/numegubowalonan/dunkin_donuts_sugar_free_vanilla_syrup_nutrition.pdfIn PDF document text
    • https://s3.amazonaws.com/zolerazowubow/what_survival_skills_are_important.pdfIn PDF document text
    • http://xakafof.rf.gd/order_bed_sheets_online_dubai.pdfIn PDF document text
    • http://kupuzoliku.rf.gd/wilim.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxime/do_beats_by_dre_have_warranty.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c1fa1a23-3663-4388-aa49-ff63e460b78a/14279880309.pdfIn PDF document text
    • https://s3.amazonaws.com/zowejunef/594663848.pdfIn PDF document text
    • https://s3.amazonaws.com/fatikonavori/rupinder_gandhi_1.pdfIn PDF document text
    • https://s3.amazonaws.com/laginekux/33493010437.pdfIn PDF document text
    • https://s3.amazonaws.com/dikomavomem/bendix_valve_catalog.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_off00016c8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16C8D 5492 bytes
SHA-256: 391c395aa9c67be84b58cebdd3ca6996235cb8394c991fda7d68d797c0ae90b6
font_01_sfnt_off00017f0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17F0B 11216 bytes
SHA-256: efb401eba65c35f65ca053ebce2cb859aeca0a9380a4e10cfd10096601c9f290

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