Malicious PDF — malware analysis report

Static analysis result for SHA-256 3857c67844a42094…

MALICIOUS

PDF

74.9 KB Created: 2021-02-16 10:51:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 56ed5352f7c763c35f92337922766937 SHA-1: 31b4ab83f67e83d0d5e4a7afc3acab8692f94b2c SHA-256: 3857c67844a42094008b048b77d4162ac197c84f56fcc2d4356e90331cbb89a4
136 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 routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise 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://bologen.ru/strik?utm_term=how+much+does+chick+fil+a+pay+at+16 PDF link annotation
    • http://select-get.top/aceable_final_exam_answers_texas8g1vf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446029/normal_5ff192f466600.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407756/normal_601bf9b87b72f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418199/normal_601721924de71.pdfIn PDF document text
    • http://weraka.online/learn_forex_trading_strategies8ddvu.pdfIn PDF document text
    • http://claire-irk.ru/anand_movie_bgm_freech437.pdfIn PDF document text
    • http://216tilford.com/install_acrobat_reader_chrome_extension_downloadf4v7n.pdfIn PDF document text
    • http://savadaqwe.space/free_rc_airboat_planswlspd.pdfIn PDF document text
    • http://namelesssouth.xyz/encyclopedie_des_plantes_magiques46yqu.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/bifamomove/free_invoice_template_word.pdfIn PDF document text
    • https://s3.amazonaws.com/dabatisew/43509980354.pdfIn PDF document text
    • https://s3.amazonaws.com/satulibaren/definition_of_coalition_formation.pdfIn PDF document text
    • https://s3.amazonaws.com/sikuva/nofavujaj.pdfIn PDF document text
    • https://s3.amazonaws.com/kodipopujufipig/noduz.pdfIn PDF document text
    • https://s3.amazonaws.com/vukumesoj/online_books_free_bg.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_off0000e699.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE699 5724 bytes
SHA-256: 8eff8a1cefbc460fb00084c95f3aa614ee3b0d941ccf65d4f23232d150982804
font_01_sfnt_off0000fa1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA1A 10648 bytes
SHA-256: f86689b7af9a695b9ae56c57459617bdd7b8f923931ab0efc12b37d615843335