Malicious PDF — malware analysis report

Static analysis result for SHA-256 737aaf8105bb5878…

MALICIOUS

PDF

77.4 KB Created: 2021-04-12 01:42:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 9e8506ed5fe4084ffc1733caa7863ef3 SHA-1: 37de68afca0945dc6a3652d5d1d85fcf2e6b61ad SHA-256: 737aaf8105bb5878778d69af2c28e4776c5573ab9dd8b46f235e4c5020f95194
156 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9960

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://pelibifir.ru/strik?utm_term=elite+dangerous+reload+cannons PDF link annotation
    • http://gakmancreatures.ru/370137228899zv68.pdfIn PDF document text
    • http://vigastlens.xyz/jafebovolobatodiritejaxog6quzi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379601/normal_5ff47550085cc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454971/normal_604130f8da8f6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369525/normal_5fcea84ed9654.pdfIn PDF document text
    • http://complect-tech.ru/69824417491fpvbp.pdfIn PDF document text
    • http://xizapataruxeku.mygamesonline.org/49793288031.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408009/normal_605fb4c093dc7.pdfIn PDF document text
    • http://about-central.com/75313527200lulb7.pdfIn PDF document text
    • http://missunik.space/sogavizonaxoseca6rb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bavatesivo.myartsonline.com/tempat_download_light_novel_anime_bahasa_indonesia.pdfIn PDF document text
    • https://s3.amazonaws.com/bubodeliza/66884657307.pdfIn PDF document text
    • http://retiziwo.myartsonline.com/avena_beneficios.pdfIn PDF document text
    • https://3f735f5a-cd1c-4288-bd93-adeff6e084d9.filesusr.com/ugd/bcc0e4_176e9ebf239d43ff878638f138f99311.pdf?index=trueIn PDF document text
    • https://9042e326-c85f-44e6-b9b6-0c206471fdba.filesusr.com/ugd/0d2fda_73f9f05b40d14b399bb19d3d56d0b5a4.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fexuror/83450440516.pdfIn PDF document text
    • https://s3.amazonaws.com/dadupawo/ssr_report_of_basanti_devi_college.pdfIn PDF document text
    • https://s3.amazonaws.com/purixifusipelid/chinatown_1962_full_movie.pdfIn PDF document text
    • https://s3.amazonaws.com/ruzumeb/how_to_use_lowrance_elite_5ti.pdfIn PDF document text
    • https://s3.amazonaws.com/mexijegedakol/30079074132.pdfIn PDF document text
    • https://eadb47d6-6712-4ecd-aa5a-2cdcf2d90b86.filesusr.com/ugd/c844bf_a15b0df5a942493ca8f66e59badecf9d.pdf?index=trueIn PDF document text
    • https://200ee3fc-349d-4871-b5c3-2c1c69b60476.filesusr.com/ugd/7b00a0_df4fe7e5db054a85afc6fe6796aef115.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jebupofedijakuk/45111338351.pdfIn PDF document text
    • https://s3.amazonaws.com/waxegatulo/24865780534.pdfIn PDF document text
    • https://s3.amazonaws.com/xojafemori/the_intouchables_theme_sheet_music.pdfIn PDF document text
    • https://4cf6c2b4-cd84-4b73-83b1-bf7f441162b2.filesusr.com/ugd/e50c99_7ee04145f15a43b796b3b693441683c1.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

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_off0000ef2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF2C 5064 bytes
SHA-256: 6d948228abf1cac7c07dba1b64dcb613762307a184fac5c4479f41101239c601
font_01_sfnt_off00010072.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10072 12008 bytes
SHA-256: 58c0831927a137c0fb4631cf90076df6d9326a2d1c0c161d294edb8f1d60f078

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