Malicious PDF — malware analysis report

Static analysis result for SHA-256 a05581d63e8ecae9…

MALICIOUS

PDF

77.6 KB Created: 2021-04-01 20:23:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 75b3a017d563800a637d572aed715791 SHA-1: 7b9277f67ecbb26bd99a172be66205f62a3fe4bb SHA-256: a05581d63e8ecae9f3725712c470944e30878d3e309c8bd015a320b75d9b246f
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 pointing to SEO-optimized PDF content, suggesting a link farm or phishing lure. The primary malicious URL identified is lozipotod.ru, which is likely used to host a phishing page or distribute further malware. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 5

  • 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.
  • 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://lozipotod.ru/strik?utm_term=how+full+is+your+bucket+summary PDF link annotation
    • https://derifopo.weebly.com/uploads/1/3/4/4/134490925/bejodenu.pdfIn PDF document text
    • https://bujasosepamus.weebly.com/uploads/1/3/4/6/134626994/5f2b484.pdfIn PDF document text
    • http://rofogukiluvupu.mygamesonline.org/bascule_rsh_maitre_esclave.pdfIn PDF document text
    • https://putojedenavaxo.weebly.com/uploads/1/3/2/6/132683165/754057.pdfIn PDF document text
    • https://webesetumisurut.weebly.com/uploads/1/3/4/3/134318687/5856843.pdfIn PDF document text
    • https://vakugisup.weebly.com/uploads/1/3/0/7/130739558/3e08476f3.pdfIn PDF document text
    • http://rosutob.getenjoyment.net/book_of_synonyms_and_antonyms_free_download.pdfIn PDF document text
    • https://bewanabexujafo.weebly.com/uploads/1/3/6/0/136050633/tililofilawijogaj.pdfIn PDF document text
    • http://folugomobok.getenjoyment.net/validity_and_reliability_of_questionnaire.pdfIn PDF document text
    • https://bufetijakuvarit.weebly.com/uploads/1/3/4/8/134878832/3c06c3989ddd.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/semuxemakaw/what_is_the_wild_technique_of_lucid_dreaming.pdfIn PDF document text
    • https://s3.amazonaws.com/xisakazelelinim/anemia_ferropenica_en_pediatria.pdfIn PDF document text
    • http://fazatela.myartsonline.com/93402036231.pdfIn PDF document text
    • http://timagugovoxo.onlinewebshop.net/fodij.pdfIn PDF document text
    • https://s3.amazonaws.com/fajujiju/54019246510.pdfIn PDF document text
    • https://s3.amazonaws.com/batiku/zutivemufa.pdfIn PDF document text
    • https://s3.amazonaws.com/bejeseja/organic_cotton_bed_sheets_queen.pdfIn PDF document text
    • https://6346cca1-8be9-442e-91e0-e35201572fa6.filesusr.com/ugd/a8c077_e350fd0c2b7646e6b4edecb3c60fd0e0.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fupanabivote/nomideresufogot.pdfIn PDF document text
    • https://s3.amazonaws.com/tigewibejageju/pokemon_go_giratina_altered_forme_raid.pdfIn PDF document text
    • https://s3.amazonaws.com/rojalexipokadaz/wallpaper_photo_hd_2018_3d.pdfIn PDF document text
    • https://3dcfbd4a-ef33-49dc-a04a-0aaf5307c30d.filesusr.com/ugd/b47706_526f4d2f82d6448485dd9d96d3628dba.pdf?index=trueIn PDF document text
    • https://010f2e21-25ca-4560-806d-08cbbb7c7db1.filesusr.com/ugd/74a852_551d9c91c15d43d09ae630ef376e856d.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_off0000f31b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF31B 5384 bytes
SHA-256: eaffce92192eb53fb7c0456510329f7178044b9f04dcccbcb51aea90a6ded2e7
font_01_sfnt_off0001056e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1056E 10444 bytes
SHA-256: 9cb37718dbbcd9dc50f0180a28faeae70d8d34c3926fbddbd371d89a8fea2099

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