Malicious PDF — malware analysis report

Static analysis result for SHA-256 bba39230853d78d1…

MALICIOUS

PDF

73.3 KB Created: 2021-02-07 23:10:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 3dba78b1f139d4fea4952761b593ac4e SHA-1: 7a6eaf21ac5a85f548d973d307d92242b8371e3e SHA-256: bba39230853d78d1f3761cf5ae70462062ada614ec8a522956a147582079708c
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://jottigo.ru/wb?keyword=osmosis%20diffusion%20worksheet%20answer%20key PDF link annotation
    • https://cdn.sqhk.co/kopozufu/5ahcjhM/pufizugufolopel.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456687/normal_5fdb87b7ecf93.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413842/normal_5fd17c5c429e4.pdfIn PDF document text
    • https://cdn.sqhk.co/suwezuzifu/ggIiesQ/61365117494.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368251/normal_601b07a76e665.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454438/normal_60128d36171d8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481397/normal_5fcc0b49b5328.pdfIn PDF document text
    • https://cdn.sqhk.co/gebitasixa/hiXLhix/lazivirap.pdfIn PDF document text
    • https://cdn.sqhk.co/xojafimib/4jcptif/fakapisofixip.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366633/normal_6010a4cbe8bd8.pdfIn PDF document text
    • https://cdn.sqhk.co/vazoguzo/RjggfYD/fruit_splash_2_game_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/zidodovare/hjaiabl/gagemasosagorepolu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416935/normal_5fddd1e7577e0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gepuxaxevo.rf.gd/edit_excel_spreadsheet_on_iphone.pdfIn PDF document text
    • https://s3.amazonaws.com/wixanarer/behavioral_activation_for_depression_scale.pdfIn PDF document text
    • https://s3.amazonaws.com/sojaxub/lizafesaretenikemuvig.pdfIn PDF document text
    • https://s3.amazonaws.com/tozaduliwubega/17445489474.pdfIn PDF document text
    • https://s3.amazonaws.com/devuxuzejozam/exploring_science_working_scientifically_8_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_off0000e271.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE271 5400 bytes
SHA-256: 437c4d35a488396cac0b19af76c0eb331d034c18e727c9797c6732e265be1265
font_01_sfnt_off0000f4bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4BB 10416 bytes
SHA-256: 67dccec250aaf7e03056ef4de1a357b613c8979309bbc966972bc58a1cbd0008