Malicious PDF — malware analysis report

Static analysis result for SHA-256 55412cff1fbe5734…

MALICIOUS

PDF

68.4 KB Created: 2021-02-06 08:32:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 1937647cdd8f75a16c9dc9e4681ae74b SHA-1: 2e3a3f8b6dc7f561b883da6c2f047b2798713d38 SHA-256: 55412cff1fbe57342bfbbb610001544b48b56a8c8e44df3f705485aff9315eb7
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, likely intended to deliver a secondary payload or redirect the user to a phishing site. The document body, though heavily obfuscated, suggests a lure related to a 'food menu template'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://maypoin.ru/aws?utm_term=food+menu+template+free+printable PDF link annotation
    • https://cdn.sqhk.co/zovitamojim/xImqphj/67898192877.pdfIn PDF document text
    • https://cdn.sqhk.co/bitomasijelo/iduvJif/elements_and_principles_of_art_quiz.pdfIn PDF document text
    • http://vizit.store/on_eagles_wings_piano_sheet_musicolu8q.pdfIn PDF document text
    • https://cdn.sqhk.co/furafurume/hinMifW/52213346641.pdfIn PDF document text
    • http://sayseedokg.com/vidifodikamujukizizefcvt8g.pdfIn PDF document text
    • http://com-signto5.xyz/business_administration_and_management_job_descriptionbqma0.pdfIn PDF document text
    • http://snapchat-alert.com/59813861241j2xdt.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454813/normal_5fddf8c9ee7a9.pdfIn PDF document text
    • https://cdn.sqhk.co/jujifefa/NsT9idO/pool_pocket_numbers.pdfIn PDF document text
    • http://onlinesos.tech/florante_at_laura_full_story_tagalog_version7rmdn.pdfIn PDF document text
    • http://svoytrylend.xyz/3427742216yrs0h.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/tobobowu/basic_c_language_programs.pdfIn PDF document text
    • https://s3.amazonaws.com/pusixa/workplace_incident_report_form_template_free.pdfIn PDF document text
    • https://s3.amazonaws.com/kagedatabujo/contact_us_page_template_html_css.pdfIn PDF document text
    • https://s3.amazonaws.com/didowugorokirug/98955902412.pdfIn PDF document text
    • https://s3.amazonaws.com/lakujusitejojet/amber_estate_design_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/bejenosugede/tropical_fish_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/xujitezu/90212211838.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_off0000d1e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1E3 5104 bytes
SHA-256: 5670bfaf727653bc8d6c3fffcdb694cf083026df6cef5b71cf508a3223e0e86e
font_01_sfnt_off0000e320.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE320 9756 bytes
SHA-256: f0e3550fd859bf0ee33bc77d5d24c2b0e4d5a9754c74d4a84a51ddf7c5cd036d

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