Malicious PDF — malware analysis report

Static analysis result for SHA-256 686fa5cfd121c5a6…

MALICIOUS

PDF

77.1 KB Created: 2021-05-10 00:49:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: b00972e79f37ceef60c64e7b627328e5 SHA-1: 68fee6230b542093623069b89afbfcaf3b9928de SHA-256: 686fa5cfd121c5a6b5b5255259d37ab367900ad67e5270b9f697562c61228bcb
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. The PDF contains a large number of external links, with one prominent link pointing to 'https://fokemale.ru/strik'. This suggests the document is part of a link farm or phishing campaign designed to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://fokemale.ru/strik?utm_term=how+much+does+it+cost+to+change+a+motorcycle+title PDF link annotation
    • https://suzotavuni.weebly.com/uploads/1/3/4/7/134765747/fokokugi.pdfIn PDF document text
    • http://zumasuxujole.22web.org/how_do_i_get_into_my_kindle_library_on_my_ipad.pdfIn PDF document text
    • https://zogeliwev.weebly.com/uploads/1/3/4/3/134353139/20c1810b896.pdfIn PDF document text
    • https://darojavanobize.weebly.com/uploads/1/3/4/8/134889586/vorirexijifofuvinep.pdfIn PDF document text
    • http://xofofumireke.mypressonline.com/reliability_engineering_and_risk_analysis_modarres.pdfIn PDF document text
    • http://kumaboperituf.22web.org/tolunutodepotep.pdfIn PDF document text
    • https://penabapemuzoji.weebly.com/uploads/1/3/1/4/131453208/6440514.pdfIn PDF document text
    • https://kujegafibez.weebly.com/uploads/1/3/4/2/134265926/34ae0fd8d2f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wawebepibalura.epizy.com/tixokofaworelexesikimo.pdfIn PDF document text
    • https://d99d9bf7-a5e0-49f2-90ac-0d1bc881463d.filesusr.com/ugd/0182ef_cf7ea0bff7e14429b77d6621246d3e10.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kovozenamofox/how_much_does_a_3d_scan_cost.pdfIn PDF document text
    • https://05e27880-d5e1-4d3d-8428-ba943e9300bc.filesusr.com/ugd/b56239_f47e5d1821f5404cbef08cc3f3710545.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tamobalasu/nalugosulubusid.pdfIn PDF document text
    • https://s3.amazonaws.com/fodose/wasabopavixesiwaxelevef.pdfIn PDF document text
    • https://s3.amazonaws.com/toliwudalamem/proactive_routing_protocols.pdfIn PDF document text
    • https://s3.amazonaws.com/gekojulog/how_to_add_oil_to_a_harbor_freight_floor_jack.pdfIn PDF document text
    • https://s3.amazonaws.com/lulelepese/google_friendly_website_templates.pdfIn PDF document text
    • http://begilokikilox.rf.gd/nonorufed.pdfIn PDF document text
    • https://734e8db3-b9db-457c-abaa-08c06218e7ae.filesusr.com/ugd/f6bb82_92560079529a4741aeb4765eb6bcf5c7.pdf?index=trueIn PDF document text
    • https://a519209a-2b0a-481f-9fe9-460c873bdc80.filesusr.com/ugd/270e53_779a6cd209934a6c910814f2480c9d54.pdf?index=trueIn PDF document text
    • http://bomajada.epizy.com/21842938220.pdfIn PDF document text
    • https://e6a48395-9ebc-465e-8505-c4b20d7b8e72.filesusr.com/ugd/81e12b_29f920af9e634d2b8e59004ce58fd14f.pdf?index=trueIn PDF document text
    • http://pojoviraxerojo.myartsonline.com/the_art_book_big_ideas_simply_explained.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_off0000eebf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEBF 5508 bytes
SHA-256: 91278e6b452e2a7d2ddb57d1c765892ce6f32600af3ff51b582bd11eb7a1aa86
font_01_sfnt_off00010164.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10164 10876 bytes
SHA-256: 27cc6cb988b0a1338f0d9fe3e00ff5d46417ea416395e244d723cbea36aee52f

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