Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc2834559c486f73…

MALICIOUS

PDF

81.5 KB Created: 2021-04-05 07:48:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 7a72b907662a303eab88b4b949b7978b SHA-1: 12a975834a26a4a1e8a9286b4e13f564dfd1a2d8 SHA-256: bc2834559c486f73f4258c9045dfd62df804d261ea034d0eadc6b1158c3baea4
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-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://nipisod.ru/strik?utm_term=eragon+book+1+quotes PDF link annotation
    • http://abanca-electronica.com/12386073610d5tdy.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373297/normal_604ebe5e4853e.pdfIn PDF document text
    • https://tibilizam.weebly.com/uploads/1/3/0/7/130775373/muzemuwenogimu-ritareguzapeku.pdfIn PDF document text
    • http://magnitoli-2ekran.site/skywalker_trampoline_canada_12_ftjl33t.pdfIn PDF document text
    • https://sinuvuliwazima.weebly.com/uploads/1/3/1/8/131871572/2968242.pdfIn PDF document text
    • https://xegilebul.weebly.com/uploads/1/3/4/3/134347284/b2b4cae.pdfIn PDF document text
    • http://decideyouself.fun/wanted_full_movie_download_in_hindi_dubbed_hollywoodtq4zb.pdfIn PDF document text
    • http://tb-films.ru/fegemupikubiwidoriresdybp.pdfIn PDF document text
    • https://zatugole.weebly.com/uploads/1/3/1/8/131856706/pimiwazezuzutilesa.pdfIn PDF document text
    • https://lebamemodeli.weebly.com/uploads/1/3/0/7/130776101/d5e9128f7492f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447647/normal_6037b7f4019b5.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://s3.amazonaws.com/muvojugejoxip/ak_47_movie_2004.pdfIn PDF document text
    • https://s3.amazonaws.com/taturi/21589632358.pdfIn PDF document text
    • https://s3.amazonaws.com/tibitexil/61547340548.pdfIn PDF document text
    • https://s3.amazonaws.com/wejuvono/bambukat_movie_punjabi.pdfIn PDF document text
    • https://s3.amazonaws.com/xupizewuxere/system_analysis_tools.pdfIn PDF document text
    • https://s3.amazonaws.com/remavuj/what_are_financial_models_in_business.pdfIn PDF document text
    • https://s3.amazonaws.com/dabatisew/changing_exclamatory_sentences_into_reported_speech.pdfIn PDF document text
    • https://s3.amazonaws.com/jusagi/how_to_run_a_weight_loss_group.pdfIn PDF document text
    • https://s3.amazonaws.com/litunux/julius_caesar_act_1_scene_3_quotes.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_off0000f3da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3DA 4996 bytes
SHA-256: 02db366f4e7f3afbbfe74edc99b48d3c574edfbb1f4833b2fe4c72998b38e1d7
font_01_sfnt_off000104e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104E2 10956 bytes
SHA-256: d5d6d5b9cd3203ef6ead0f4f68890d0ac7ab76383e51e10153fa3f9ebce94d88
font_02_sfnt_off00012a1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A1D 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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