Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3f0bad220f89e02…

MALICIOUS

PDF

78.1 KB Created: 2021-03-14 09:56:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 23739f9aa1b4ebefbb0069e15ecfcd7d SHA-1: d7726ffd767b6d309a5281178b1ea6a7b67fcd56 SHA-256: f3f0bad220f89e0297f3f7b38f90273d188dc69a46cb57a03ccd11334c27c844
156 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. It contains a large number of external links, many pointing to PDF files, suggesting a link farm or SEO poisoning tactic. The primary URL, 'https://zajinet.ru/strik?utm_term=stained+glass+window+project+worksheet+answers', is likely used to redirect users to a malicious payload or phishing page.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://zajinet.ru/strik?utm_term=stained+glass+window+project+worksheet+answers
    • https://vukekitap.weebly.com/uploads/1/3/1/4/131438073/zavejijodinunepejufu.pdf
    • https://gijesilikisuzid.weebly.com/uploads/1/3/2/6/132683000/nolofuf-defibutisafo.pdf
    • https://sunutefe.weebly.com/uploads/1/3/5/3/135350425/9302997.pdf
    • https://wotujajatedigi.weebly.com/uploads/1/3/5/2/135295120/guwewipiz-ruzikawevowo-daramav-nusuxaki.pdf
    • http://pefujogori.iblogger.org/semakobenurisikitovunigir.pdf
    • http://leon-stavki.info/nijigomexemidijafiwarkvvs.pdf
    • http://realwockyc.info/rotten_tomatoes_best_movies_2018_audience_scorefj20r.pdf
    • https://fimosezit.weebly.com/uploads/1/3/0/7/130775491/jununawetapovewa.pdf
    • http://sogejovep.mypressonline.com/kasokunonipiwosi.pdf
    • http://pelistens.xyz/61578592856jasqa.pdf
    • https://lifitexuga.weebly.com/uploads/1/3/4/3/134356919/97c95eb820dcb3.pdf
    • http://talenunuvowa.iblogger.org/correct_answer_sound_effect_free_wav.pdf
    • http://bumaga.bz/59869577302tzr7u.pdf
    • http://kajipim.mypressonline.com/kidde_kn-cob-b-ls_manual.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://nifibomagogov.rf.gd/mokavixujevemezuzoruper.pdf
    • https://uploads.strikinglycdn.com/files/2abbca69-e3cc-4265-b11d-e19b6df39163/jozunupaf.pdf
    • http://vumamuv.myartsonline.com/23826344942.pdf
    • https://uploads.strikinglycdn.com/files/d6567ad7-fd2d-4b4f-bbea-bbddbb9ca72f/how_much_is_my_yamaha_flute_worth.pdf
    • https://uploads.strikinglycdn.com/files/0805d498-2cf7-4d4d-bca3-5d2baabeb5c6/the_knife_of_never_letting_go.pdf
    • http://faxiruvud.myartsonline.com/xixuwugulitusemujawizeze.pdf
    • https://uploads.strikinglycdn.com/files/f9d39daf-7a55-4ba0-bc85-8f69447255b5/what_is_the_pact_about.pdf
    • http://widadipadiv.epizy.com/27666487161.pdf
    • http://pevivudawof.epizy.com/25029002746.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f249.bin
9d3cbc67059b9924430159c08cfe9c4f1d23256c1e79d8a5b1aaa4fbb8e89d6a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF249 5672 bytes
font_01_sfnt_off000105a5.bin
2f8a65b00f4750901183b5aa81fad079c618ea3c191517be426e95699d097ced		 pdf-font-stream PDF embedded font (sfnt) at offset 0x105A5 11232 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.