Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5d68c80cb171a1d…

MALICIOUS

PDF

72.2 KB Created: 2021-03-20 13:05:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-28
MD5: 000e8b971f05920b1da093a287b85cda SHA-1: 236b4ca2f2c0f2e89d28327857400176f2c491d7 SHA-256: b5d68c80cb171a1d82396fda0cd64ef027b4dd0174a4cb11ab4c0358cd43c5ec
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://crophysi.ru/wix?keyword=solutions+for+science+solar+generator+reviews'. This indicates the document's primary purpose is to lure users to a potentially malicious site. The ML classifier also strongly flagged this PDF as malicious, supporting the phishing or malware distribution intent. No scripts were extracted, but the embedded URL is sufficient evidence for the attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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/wix?keyword=solutions+for+science+solar+generator+reviews In PDF document text
    • http://toolsbestpricemicrometer.site/zogipejijasugugokimakek77e8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383314/normal_5fdff96e054b8.pdfIn PDF document text
    • http://rowexusaje.mypressonline.com/fabevuniranukizojo.pdfIn PDF document text
    • http://tafuxasomup.getenjoyment.net/bestiary_1_pathfinder.pdfIn PDF document text
    • http://bukuxojunuz.mypressonline.com/mathematics_symbols_and_meaning.pdfIn PDF document text
    • http://gosugas.getenjoyment.net/circe_book_characters.pdfIn PDF document text
    • http://energierecrute-emplois.com/kerala_psc_assistant_engineer_civil_booksdegca.pdfIn PDF document text
    • http://i12tws.website/acer_aspire_c24_keyboard_not_workingjfefy.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454051/normal_5fe52e531005c.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/sefepugolupalax/can_you_get_rich_off_penny_stocks.pdfIn PDF document text
    • https://s3.amazonaws.com/limepusotanal/chennai_express_tamil_songs_starmusiq.pdfIn PDF document text
    • http://makakanow.onlinewebshop.net/waruwapepemo.pdfIn PDF document text
    • https://s3.amazonaws.com/lotibabakuj/cahuzac_cantilene_clarinet.pdfIn PDF document text
    • https://s3.amazonaws.com/marimejerebo/tozer_pursuit_of_god_chapter_8.pdfIn PDF document text
    • https://s3.amazonaws.com/gotenukevepunin/97138219640.pdfIn PDF document text
    • https://s3.amazonaws.com/fekife/language_arts_worksheets_grade_2.pdfIn PDF document text
    • https://s3.amazonaws.com/pululusodogi/francis_d.k._ching_architecture_form_space_and_order_download.pdfIn PDF document text
    • https://s3.amazonaws.com/dazifozixawus/43199398452.pdfIn PDF document text
    • https://s3.amazonaws.com/futamo/11219273082.pdfIn PDF document text
    • https://s3.amazonaws.com/kozewuposoridil/fomomatoxovami.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_off0000da97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA97 5304 bytes
SHA-256: ee9c758c1921f645461d3e270060a6b28695e17ff2eed3daf294a603bed0fc81
font_01_sfnt_off0000ecc9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECC9 10720 bytes
SHA-256: 6677c3977771e145d8603c66428190d38b5401153a874bb7660662fcbc2d047a

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