Malicious PDF — malware analysis report

Static analysis result for SHA-256 edbecf08db2216d1…

MALICIOUS

PDF

76.8 KB Created: 2021-03-27 11:18:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: ab062db281bb43d3f24b1ef726919a9d SHA-1: e94b95734181edcdca9278b281d530057a61638d SHA-256: edbecf08db2216d140951cf3cae831e74c45c32dae97376234bf402cda4413e6
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://seumenha.ru/123?utm_term=subtraction+math+facts+worksheets+grade+3 PDF link annotation
    • https://safapovajedetux.weebly.com/uploads/1/3/4/6/134642125/768059.pdfIn PDF document text
    • http://itash.space/kugatenepavo342u8.pdfIn PDF document text
    • http://kawlites.online/3_nephi_1-71cgno.pdfIn PDF document text
    • http://goodnatural.space/quran_tilawat_full_30_para_with_urdu_translation_mp3_downloadvux1p.pdfIn PDF document text
    • http://awpmode.com/dd_wrt_download_ftpq2231.pdfIn PDF document text
    • http://jidokove.scienceontheweb.net/bovisenenuwizevetulotig.pdfIn PDF document text
    • http://zavolofa.mygamesonline.org/tijavuguviz.pdfIn PDF document text
    • https://muvuvudu.weebly.com/uploads/1/3/5/3/135351086/zidumuboj.pdfIn PDF document text
    • http://hellochildren.online/rivijudabafirantcxgn.pdfIn PDF document text
    • http://tebogekememesij.mygamesonline.org/myron_mixon_bbq_rub.pdfIn PDF document text
    • https://sojomirolasa.weebly.com/uploads/1/3/4/3/134325131/6791be400fc.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/liluvad/nirigurikufokafexosa.pdfIn PDF document text
    • https://s3.amazonaws.com/putelekireza/annual_report_2019_qantas.pdfIn PDF document text
    • http://medexode.atwebpages.com/briggs_and_stratton_lookup_by_serial_number.pdfIn PDF document text
    • https://s3.amazonaws.com/kefiperizonofu/craftsman_weedwacker_25cc_carburetor_adjustment_tool.pdfIn PDF document text
    • https://s3.amazonaws.com/buganabowumujef/duniwufidapito.pdfIn PDF document text
    • https://s3.amazonaws.com/fosawef/lamexibisatinuraxizine.pdfIn PDF document text
    • https://s3.amazonaws.com/lanorolowu/77234301390.pdfIn PDF document text
    • https://s3.amazonaws.com/minaxigevani/how_much_does_it_cost_to_exchange_sodastream_carbonator.pdfIn PDF document text
    • https://s3.amazonaws.com/jigezilor/command_prompt_commands_network_troubleshooting.pdfIn PDF document text
    • https://s3.amazonaws.com/jadudusujuje/wekelaxezejupuvigoj.pdfIn PDF document text
    • https://s3.amazonaws.com/xoguwavosuje/ririxopibejenoxovaporitu.pdfIn PDF document text
    • https://s3.amazonaws.com/fokapikow/97772303318.pdfIn PDF document text
    • https://s3.amazonaws.com/liwafo/manual_de_organizacin_y_funciones_de_una_empresa_comercial.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_off0000ee8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE8A 5964 bytes
SHA-256: 522e689ca2e5a29bc39a2805fd3017f6266bdd45247e8fd315c31bab78c31628
font_01_sfnt_off000102c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102C5 10192 bytes
SHA-256: 4e378fcc6c1053b671c8f87dd8afa6dcea3aefaa44abcea2b2682cd585a5c346

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