Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ebfa6fc8215a7ef…

MALICIOUS

PDF

81.3 KB Created: 2021-04-19 11:17:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: db58311e3c36354e98492dfd43f0cb4b SHA-1: e30e0c0be4eed29f4c7aaecf39db8e8dc88ee70d SHA-256: 7ebfa6fc8215a7ef30f4cb9c6643f69f37468a58d607cf8f4700f0d66dc115c8
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a machine learning classifier and ClamAV, indicating malicious intent. The document contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm designed to redirect users to malicious sites. The presence of external URIs and the 'link farm' heuristic strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://xajibur.ru/strik?utm_term=how+to+discuss+social+justice+at+work PDF link annotation
    • http://rowitewufow.22web.org/606405071.pdfIn PDF document text
    • http://gramnews.xyz/pengertian_alkalinitasbbmmw.pdfIn PDF document text
    • https://cdn.sqhk.co/kinibemazoz/WRsQeyI/pastimes_pub_grille_ripon_wi.pdfIn PDF document text
    • http://wovobogawukepu.iblogger.org/vavadol.pdfIn PDF document text
    • https://cdn.sqhk.co/zimalodepafo/3iiidRu/dodgers_lakers_shirt_recreate_88.pdfIn PDF document text
    • https://cdn.sqhk.co/tifobebe/jawTJEx/66553978733.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478688/normal_605f8c826588a.pdfIn PDF document text
    • http://dotixomovi.sportsontheweb.net/92554460843.pdfIn PDF document text
    • https://cdn.sqhk.co/jumifokujuje/ie0r9gj/investing._com_stocks_finance_markets_news.pdfIn PDF document text
    • http://narezekopalezi.iblogger.org/nojirinopesamuxiwi.pdfIn PDF document text
    • https://cdn.sqhk.co/vimanagadu/WhafhcO/pokibanu.pdfIn PDF document text
    • http://bridgecommerce.com/50087761952azlz4.pdfIn PDF document text
    • http://pazadixokumox.sportsontheweb.net/jiliwasarogo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374359/normal_600c5326c36da.pdfIn PDF document text
    • http://fejiximodanu.mygamesonline.org/bbc_compacta_class_11_english_answers.pdfIn PDF document text
    • http://de-bewertung-889562.icu/sosyal_bilimlerde_aratrma_yntemleri_af_ckm_sorularoyru3.pdfIn PDF document text
    • https://cdn.sqhk.co/nuvexajamu/iczexig/fexafiledow.pdfIn PDF document text
    • http://japamawosoj.mygamesonline.org/99918863705.pdfIn PDF document text
    • http://sosed.market/14337758629n5ptd.pdfIn PDF document text
    • http://getyourscore.info/lawisuwopilerapampmfj.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sutexuvidag.myartsonline.com/46727140024.pdfIn PDF document text
    • http://dowibisewapidon.rf.gd/37851836309.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_off0000ff0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF0E 5124 bytes
SHA-256: 80a5ec3bb55327f9411bb42a0185890fae6532d45b2efaf49f63f5f99d1c5303
font_01_sfnt_off0001109d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1109D 10964 bytes
SHA-256: b7cf85a7164a8d3bba877677fa34a463eaad3e41927fe04f0d955a23119f7138

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