Malicious PDF — malware analysis report

Static analysis result for SHA-256 a76d9f66a5f63b0a…

MALICIOUS

PDF

67.5 KB Created: 2021-01-23 13:57:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: b99383cf3dcd397c4317c5dbc272edd6 SHA-1: 9b111842d33671c146034403c4424f05ecc85042 SHA-256: a76d9f66a5f63b0ad55c302c521d7f976b81e144dfe8a3480f067edaa68fff85
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file is a PDF document that contains an embedded URL pointing to a suspicious domain, identified by ClamAV as Pdf.Phishing.Trojan. The ML classifier also flagged this PDF with high confidence. The document body, though heavily obfuscated, suggests a lure related to a 'guitar pick holder template'. The presence of embedded URLs and the overall detection by security tools indicate a phishing attempt designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://traffking.ru/aws?utm_term=guitar+pick+holder+template PDF link annotation
    • https://site-1235980.mozfiles.com/files/1235980/four_brothers_imdb_parents_guide.pdfIn PDF document text
    • https://cdn.sqhk.co/furaxofir/igid0ja/basketball_court_three_point_line_distance.pdfIn PDF document text
    • https://cdn.sqhk.co/goberirud/IjfKrgj/voltage_drop_across_capacitor_ac.pdfIn PDF document text
    • https://cdn.sqhk.co/veludewozen/gcxaDia/norugugasumuwipiwave.pdfIn PDF document text
    • https://site-1180586.mozfiles.com/files/1180586/3_mystery_words_level_16.pdfIn PDF document text
    • https://site-1168031.mozfiles.com/files/1168031/free_virus_scanning_software.pdfIn PDF document text
    • https://site-1210512.mozfiles.com/files/1210512/schma_amplificateur_audio.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369149/normal_60004d81d9c48.pdfIn PDF document text
    • https://site-1173984.mozfiles.com/files/1173984/bosque_seco_tropical_del_ecuador.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387713/normal_5fe489326de56.pdfIn PDF document text
    • https://site-1204089.mozfiles.com/files/1204089/jesavejozed.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485005/normal_5fe2946033f32.pdfIn PDF document text
    • https://cdn.sqhk.co/bifugudawesu/lgfjbhd/62209809911.pdfIn PDF document text
    • https://site-1171656.mozfiles.com/files/1171656/bugitukopebofukurit.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444622/normal_5fefebaf2bdce.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/ritoma/company_profile_mockup_psd_free.pdfIn PDF document text
    • https://s3.amazonaws.com/vizegemawokaxe/bethesda_mods_won_t.pdfIn PDF document text
    • https://s3.amazonaws.com/pezofut/cover_page_of_audit_report.pdfIn PDF document text
    • https://s3.amazonaws.com/tujeviwakirawu/yahoo_messenger_for_android_mobile_phones.pdfIn PDF document text
    • https://s3.amazonaws.com/fajonubinomeder/10th_cbse_english_book.pdfIn PDF document text
    • https://s3.amazonaws.com/budovewesekaz/relieving_letter_from_employer_format.pdfIn PDF document text
    • https://s3.amazonaws.com/saxefi/85335093117.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_off0000cb1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB1A 5228 bytes
SHA-256: 163fdd251d64c566589c7d50b65303a4bd958a0b46d86077364e9c3f207f5046
font_01_sfnt_off0000dcbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCBF 10740 bytes
SHA-256: 4261ca2824046324b89034307a09ed7ac1e37ce582ba0daffdcb76ed00ee22d7

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