Malicious PDF — malware analysis report

Static analysis result for SHA-256 b437eda99a328aea…

MALICIOUS

PDF

219.0 KB Created: 2021-04-06 00:28:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: d852cb5464b95f517b25e5a548ef2e76 SHA-1: 56b39e9fb6515f0a0a09675f7704b37fd9524285 SHA-256: b437eda99a328aea98068cd284d7559d6e58c6375cebdb3ba26449f96635ad51
96 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 external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9820

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://ponafet.ru/wix?keyword=big+ideas+math+geometry+1.1-1.3+quiz+answers PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4470040/normal_605d5e714b5bd.pdfIn PDF document text
    • http://kapubasezo.iblogger.org/angular_6_tutorial_point.pdfIn PDF document text
    • https://cdn.sqhk.co/wexovezojab/jaSjbXE/dimogosexixofebakagoduxa.pdfIn PDF document text
    • https://cdn.sqhk.co/bubiwalifeda/cM1RPhe/jepemezad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468286/normal_60199df8ad181.pdfIn PDF document text
    • https://cdn.sqhk.co/bawusipa/icqieij/tabletop_outdoor_gas_fire_pit.pdfIn PDF document text
    • https://cdn.sqhk.co/vakusukereju/iSdSDNh/gakadasewapemonukigod.pdfIn PDF document text
    • https://cdn.sqhk.co/jogibigeda/bvihxhf/airtel_postpaid_bill_online.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482870/normal_5fecf2ac0d5dd.pdfIn PDF document text
    • https://cdn.sqhk.co/wosipuvetot/bieTihl/vetezopibanaxeziloten.pdfIn PDF document text
    • https://cdn.sqhk.co/laxuweredex/gx7hcP9/befokuvasebakodegon.pdfIn PDF document text
    • https://cdn.sqhk.co/gozawelesutu/jeOhdii/naxatazevujetoz.pdfIn PDF document text
    • https://cdn.sqhk.co/merivexasug/eKggicS/plants_vs_zombies_2_pc_free_download_softonic.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fowopigax.epizy.com/gatasijulud.pdfIn PDF document text
    • http://benevelolimeb.epizy.com/helping_verbs_worksheet_4th_grade.pdfIn PDF document text
    • http://tunogamux.rf.gd/23953767642.pdfIn PDF document text
    • http://tukufewusi.epizy.com/52464265526.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/92be5051-5367-4a6d-85b4-84227b65dcbc/92554027604.pdfIn PDF document text
    • http://mapakipoborepuj.epizy.com/afcat_2015_answer_key.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/20441a90-4d02-46b5-96f1-e85d185e6dcf/12085878486.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0003087e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3087E 5904 bytes
SHA-256: 99f4db436f6acdf35147f629f4c751c7373a9b116ace0d97d9499e0f1b40d446
font_01_sfnt_off00031c9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31C9D 12236 bytes
SHA-256: 7f3ce84c94c0c1b13c46ccc3c3d7e312ecf453260932d090939bdeb87957613e
font_02_sfnt_off00034698.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x34698 16256 bytes
SHA-256: 749bcfc773072c4496cbb4f504cc30788fe75b88a15799e955439b3a676b7fce