Malicious PDF — malware analysis report

Static analysis result for SHA-256 c158ba9d5127ddee…

MALICIOUS

PDF

76.7 KB Created: 2021-02-15 14:49:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: eff09118fba63abb6a9f2b2b8e7f1e9e SHA-1: 13e2dd7299897addc8d9ac6dd2c9177137584988 SHA-256: c158ba9d5127ddeef54cb28db173e4ab1c9e059ffbcf3f95d868a1a11f4deea7
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that points to a suspicious domain, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URI heuristic point towards a social engineering lure to visit a malicious site.

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://baarspo.ru/strik?utm_term=english+literature+jobs+abroad PDF link annotation
    • http://legendarycraft.ru/zigavukoxodhi86.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490918/normal_5fcd573bdbdc1.pdfIn PDF document text
    • http://ketosimple.online/blacksad_201rlr.pdfIn PDF document text
    • http://stav-games.ru/77098229108axk97.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478146/normal_5fe6b252648a7.pdfIn PDF document text
    • http://energierecrute-emplois.com/9502916252b16tg.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374533/normal_5ffdf266dd6ad.pdfIn PDF document text
    • http://giveaway2020.info/la_ajorca_de_ororgrfa.pdfIn PDF document text
    • http://tomogorman.com/13301770618fvsib.pdfIn PDF document text
    • http://poradoit2.site/marcadores_discursivos_listal0s4d.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/likerajatob/barefoot_gen_movie.pdfIn PDF document text
    • https://s3.amazonaws.com/fuvidokibet/duvalay_mattress_topper_sheets.pdfIn PDF document text
    • https://s3.amazonaws.com/vexosafugunu/suzukol.pdfIn PDF document text
    • https://s3.amazonaws.com/gavobawum/letsencrypt_certbot_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/mefadedosuw/bruchgleichungen_beispiele.pdfIn PDF document text
    • https://s3.amazonaws.com/gajakelegeza/bonafide_certificate_letter_format_for_school.pdfIn PDF document text
    • https://s3.amazonaws.com/wexukufedepim/chita_chola_song_mp4.pdfIn PDF document text
    • https://s3.amazonaws.com/dumupa/49506950304.pdfIn PDF document text
    • https://s3.amazonaws.com/sorogamat/various_stages_of_venture_capital_financing.pdfIn PDF document text
    • https://s3.amazonaws.com/fizup/possessive_nouns_worksheet_with_answers.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_off0000ed54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED54 5260 bytes
SHA-256: 8b8f6d5814ee13f16617bd3372c52cbc050fb508769cfc1d5ca809ebc03805dc
font_01_sfnt_off0000ff2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF2F 11300 bytes
SHA-256: c83b286e09c1b8ba655c90fead1acb6645e4f789dcf6dec06428b6484f581304

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