Malicious PDF — malware analysis report

Static analysis result for SHA-256 89e00320d7dee09e…

MALICIOUS

PDF

76.9 KB Created: 2021-04-13 00:02:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 57d1d0d827c7a079a358222bd1225516 SHA-1: 21c6ee51006327702d4405ba4ea1714241f7aaed SHA-256: 89e00320d7dee09e01c4b7b001da7d1bbd1bf33c595178f11b4695504e895723
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a critical heuristic firing indicating it links to known malicious redirector infrastructure. The embedded URL 'https://crophysi.ru/strik?utm_term=iso+31000+risk+management+certification' is presented in a context that suggests a phishing attempt related to risk management certification. ClamAV also detected this file as a phishing trojan. No scripts were extracted, but the presence of malicious links strongly suggests a phishing attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://crophysi.ru/strik?utm_term=iso+31000+risk+management+certification In PDF document text
    • http://lenudes.com/1920093457owp5a.pdfIn PDF document text
    • http://reggis.info/350707009284d4pk.pdfIn PDF document text
    • http://naturmilans.fun/95332016399h9zrz.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/dafumuxitupav/66686106039.pdfIn PDF document text
    • https://s3.amazonaws.com/xixonu/65456434246.pdfIn PDF document text
    • https://s3.amazonaws.com/lezerawe/80360945429.pdfIn PDF document text
    • https://s3.amazonaws.com/leributafa/terminating_employment_letter_template.pdfIn PDF document text
    • https://s3.amazonaws.com/rizijubovapuk/46252583595.pdfIn PDF document text
    • https://s3.amazonaws.com/divikufifir/97465148148.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/54b7dba9-9f09-4d88-ada4-c0f467010ac3/list_of_html_tags_and_definitions.pdfIn PDF document text
    • https://s3.amazonaws.com/rimepusox/gcf_lcm_worksheet_kuta.pdfIn PDF document text
    • https://s3.amazonaws.com/saziwijaxodav/why_has_my_dometic_fridge_stopped_working.pdfIn PDF document text
    • https://s3.amazonaws.com/rupatojuko/japanese_hiragana_practice_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/daraniwekamidir/game_boboiboy_for_pc_free.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxutedi/kewirudewekuxakunutomotom.pdfIn PDF document text
    • https://s3.amazonaws.com/desekusoxi/the_secret_life_of_bees_book_audio_chapter_1.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5ebf6f9f-3ade-434b-8cfe-5f4b3dcf3645/free_english_grammar_book_for_beginners.pdfIn PDF document text
    • https://s3.amazonaws.com/paxuvagal/sibomabaraxugadopoj.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_off0000eddf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDDF 5528 bytes
SHA-256: 19d2f42227d1935d15b846487d8f77c61384b928c0e77ae3f8734b6291f0a5b4
font_01_sfnt_off000100a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100A8 11028 bytes
SHA-256: 88787fa3e10d2f1785136248bce4c573f09ec5325ea2ddfed324fcffa189c30b

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