Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab2f961244e05d20…

MALICIOUS

PDF

79.1 KB Created: 2021-04-05 19:27:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 5ceab6c95e433f8719dc39d6adb86618 SHA-1: c36964c777d0520d06ae73bf7d31d8107188377a SHA-256: ab2f961244e05d20bb55bedbd617df3b7e81c495df1bf781cd8e610111086c06
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are SEO-focused, suggesting a link farm or spamming operation. One prominent URL, https://baarspo.ru/wix?keyword=saucony+guide+women%2527s+size+6, is presented in a way that mimics search results, likely to drive traffic to malicious or spam content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://baarspo.ru/wix?keyword=saucony+guide+women%2527s+size+6 PDF link annotation
    • http://wopizup.mypressonline.com/ebook_ceros_dan_batozar.pdfIn PDF document text
    • http://ziwusis.getenjoyment.net/cirrhosis_treatment_guidelines.pdfIn PDF document text
    • https://liburesaxus.weebly.com/uploads/1/3/4/3/134372769/vazogodufekafif.pdfIn PDF document text
    • https://zuxidonav.weebly.com/uploads/1/3/4/8/134867872/1e41067af6d.pdfIn PDF document text
    • https://cdn.sqhk.co/rinugezig/f9YqUia/remelonaje.pdfIn PDF document text
    • https://cdn.sqhk.co/kitujesijak/Jjco88g/mafia_city_cheat_codes_android.pdfIn PDF document text
    • https://nefirekemoziwep.weebly.com/uploads/1/3/4/3/134332842/02eac0187dc412.pdfIn PDF document text
    • http://xumupizaxuto.scienceontheweb.net/vugulixuz.pdfIn PDF document text
    • https://lawaxiwutaf.weebly.com/uploads/1/3/4/3/134356413/supejejelajox.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/polojuliragam/data_structures_and_algorithms_niklaus_wirth.pdfIn PDF document text
    • https://s3.amazonaws.com/lowuwofuxali/stab_wound_autopsy_report.pdfIn PDF document text
    • https://d4f4546a-a836-4b3d-8651-c56b89608eca.filesusr.com/ugd/3e9e83_7cc72c85a65e4d4ca6dbcd1df169666e.pdf?index=trueIn PDF document text
    • https://246406bc-bb0d-4f29-baed-d8a6153a9543.filesusr.com/ugd/3ddeef_5cf1ba8bd18d4f37b8463476b96af5df.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/nafibanefexex/how_to_remove_samsung_desktop_stand.pdfIn PDF document text
    • https://s3.amazonaws.com/boxujetanonikuv/59889893141.pdfIn PDF document text
    • https://6cb1c90e-07cf-4522-b85d-4edd8abc33c8.filesusr.com/ugd/0c41e7_ec5bed6f01b244a8b439e2ccbaabe4f9.pdf?index=trueIn PDF document text
    • https://9afb1793-bc57-4514-bb46-74e980466609.filesusr.com/ugd/11f207_6719987cdd4b45dfbf70bf06c5bc1979.pdf?index=trueIn PDF document text
    • https://b70645e9-42d7-44c6-80f2-f165c8819e8d.filesusr.com/ugd/3f1130_35d192d3e608407da2b3ebc752e2e9ed.pdf?index=trueIn PDF document text
    • https://d7ae471b-a447-437d-81b4-4e603f8679d9.filesusr.com/ugd/0a3240_0c9c03e39de24190bf0f25c3ec534fff.pdf?index=trueIn PDF document text
    • https://f6ea5e03-7e7c-4dce-82ee-fd5d223759ef.filesusr.com/ugd/d203ad_36d84730eb1f484580dab83626e1423d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dikobepibelun/50943604735.pdfIn PDF document text
    • https://e691ad07-92dc-45fa-af10-8929b4045ede.filesusr.com/ugd/87b9a8_05c7242701324b95a6b52fda960c17e8.pdf?index=trueIn 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_off0000f593.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF593 5664 bytes
SHA-256: 5f43e3037bc9582ae4a54d7615e2d292c85be9e8ffcf41894764e5d067d2e727
font_01_sfnt_off000108f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108F8 11092 bytes
SHA-256: 220ec7f6b17e26cdd8e070ab5df39c41cf8055badee55795cbe3ddef0a393351

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