Malicious PDF — malware analysis report

Static analysis result for SHA-256 b193f610385a0faf…

MALICIOUS

PDF

80.4 KB Created: 2021-03-15 21:00:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 3766bc1dce6c4fd748882e74c0cda2a8 SHA-1: 69310c797035f690aa9c92a409aee44c0f9d1363 SHA-256: b193f610385a0faf648a7906fe621a73215aed9298625761900bc46aafb4f990
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The file functions as a link farm, containing numerous embedded URLs that redirect to external sites, some of which are hosted on disposable domains or associated with potentially harmful content. The presence of external URIs and the link farm structure suggest an attempt to lure users to malicious websites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 6

  • 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.
  • 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://golowaki.ru/strik?utm_term=what+are+the+7+elements+of+crime PDF link annotation
    • https://basedupapopulow.weebly.com/uploads/1/3/4/3/134344364/duful.pdfIn PDF document text
    • https://cdn.sqhk.co/xenaporo/OtQjdud/crazy_pumpkins_carving.pdfIn PDF document text
    • http://vazawujuzu.sportsontheweb.net/34118702172.pdfIn PDF document text
    • https://cdn.sqhk.co/lagidexetin/6jfjaIv/87951676107.pdfIn PDF document text
    • http://gagivukamuw.getenjoyment.net/jalapezuxaranorejeponok.pdfIn PDF document text
    • https://jefaxuler.weebly.com/uploads/1/3/0/7/130775921/71bf5a323d1.pdfIn PDF document text
    • http://muzibatixabu.mypressonline.com/what_are_good_books_for_14_year_olds.pdfIn PDF document text
    • http://fukazab.mywebcommunity.org/a_u_b_venn_diagram.pdfIn PDF document text
    • https://kaxalosenawa.weebly.com/uploads/1/3/4/5/134576513/xulut.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://a1c9bafd-2917-4c1b-b79c-a4b44a941470.filesusr.com/ugd/f0f215_871d2de020c3407dbab76eaafc6e85df.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xajowu/aptitude_questions_and_answers_asked_in_wipro.pdfIn PDF document text
    • https://e8ceee85-86bf-4804-80ab-d7a1511cbcf5.filesusr.com/ugd/38650a_0c63b7bb0bd5452c9f55b0fe6098fea8.pdf?index=trueIn PDF document text
    • http://vawirir.atwebpages.com/angular_2_tutorial_point_download.pdfIn PDF document text
    • https://s3.amazonaws.com/guxosa/30516980938.pdfIn PDF document text
    • http://nakixaxev.myartsonline.com/fundamentals_of_computer_programming_download.pdfIn PDF document text
    • https://7a9095e9-4ba3-4ff7-9406-a75d0382ce8a.filesusr.com/ugd/db93e9_f713632fe166407bbf4aefb05f6f972d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/nafoxuda/laying_vinyl_sheet_flooring_in_bathroom.pdfIn PDF document text
    • https://s3.amazonaws.com/pigolo/digital_forensic_investigation_report_example.pdfIn PDF document text
    • https://75edee45-cd08-43cb-a752-0c33e5c2343f.filesusr.com/ugd/a7c173_f22a08c46a2f4b6ea2cc016ce46d07f6.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/mujevubutukoxu/app_store_doesn_t_mac.pdfIn PDF document text
    • https://ea74ff18-003d-4094-8454-8d7e15e33abb.filesusr.com/ugd/50de67_9c150d980f8b4b7c8774e41b647c1cfb.pdf?index=trueIn PDF document text
    • http://xifeloj.onlinewebshop.net/1000uf_capacitor_datasheet.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f0cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0CF 5000 bytes
SHA-256: e8c5f8c8166452cb1a5e35517188a9e54ed91e7a9258e6334e7e6f44ab2d1dd8
font_01_sfnt_off000101ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101AE 10584 bytes
SHA-256: 3ae7c8a9fab5822a82e780f0c05616ca88b339933d0c2dd0342fdc9ffdde892a
font_02_sfnt_off000125dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125DD 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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