Malicious PDF — malware analysis report

Static analysis result for SHA-256 90a761994fad64ba…

MALICIOUS

PDF

76.8 KB Created: 2021-04-02 20:59:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 8b7dd6724964c18e76e51b4d7cb325d4 SHA-1: 17ee2e0f9a1ac525eca592ade858789bc4bf1c56 SHA-256: 90a761994fad64ba182057e427c9c54db2e7812f27892381ad48573149f9d996
156 Risk Score

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 0.9991

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://jumiwimov.ru/123?utm_term=android+studio+ndk+library+project PDF link annotation
    • https://pafutidosuzov.weebly.com/uploads/1/3/5/9/135989867/8935049.pdfIn PDF document text
    • http://vatasefapulik.iblogger.org/ledidixuwe.pdfIn PDF document text
    • http://lalexejiwisejul.iblogger.org/vigofutegopavesi.pdfIn PDF document text
    • https://wajefoxefibivi.weebly.com/uploads/1/3/2/8/132814680/7958421.pdfIn PDF document text
    • https://wekosidofanepa.weebly.com/uploads/1/3/2/6/132696212/9079490.pdfIn PDF document text
    • http://pogekoxuw.mygamesonline.org/imam_al_ghazali_livres.pdfIn PDF document text
    • https://tojalalegeb.weebly.com/uploads/1/3/4/5/134584715/goresubetiruvep-lenujibogebar-fogadutib.pdfIn PDF document text
    • http://nufudaluwunuja.22web.org/angular_4_form_example.pdfIn PDF document text
    • http://mobufuwiwid.medianewsonline.com/cub_scouts_uniform_cost.pdfIn PDF document text
    • https://xuwobonamufaguw.weebly.com/uploads/1/3/5/3/135315698/kixisujebow.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/genedonapubefe/rabumewuginuvurew.pdfIn PDF document text
    • http://worizekadi.epizy.com/lagu_bidadari_tak_bersayap_cover_gitar.pdfIn PDF document text
    • https://s3.amazonaws.com/tiduro/the_rime_of_the_ancient_mariner_themes_sparknotes.pdfIn PDF document text
    • https://s3.amazonaws.com/wuxupewu/cuco_chiquito_album.pdfIn PDF document text
    • https://s3.amazonaws.com/timeziso/54992659438.pdfIn PDF document text
    • http://lodonevubepivor.epizy.com/post_impressionism_and_expressionism_similarities.pdfIn PDF document text
    • https://s3.amazonaws.com/memexelu/bloody_fields_of_flanders_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/xonaxevetaf/mixowowomazazafuzigokedu.pdfIn PDF document text
    • https://s3.amazonaws.com/mivokozibu/dna_template_and_non_template_strand.pdfIn PDF document text
    • https://s3.amazonaws.com/jinotugiwomo/adobe_acrobat_reader_for_linux_free.pdfIn PDF document text
    • http://fazetotunoju.epizy.com/valkyrie_guide_god_of_war_4.pdfIn PDF document text
    • https://s3.amazonaws.com/vovopafubipu/22318319871.pdfIn PDF document text
    • http://tujajolurasa.rf.gd/que_es_amalgama_dental.pdfIn PDF document text
    • https://s3.amazonaws.com/lolaritemukole/vudusizasufodi.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE7D 5436 bytes
SHA-256: a83a5d341661564b45c0d2bf416c69ad407aa88899c4f89f9a979c69fe2f8819
font_01_sfnt_off00010116.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10116 10896 bytes
SHA-256: a823213f5c91b51c54251f9811f04821311365bd8b7351e02a3629bd357c7d72

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