Malicious PDF — malware analysis report

Static analysis result for SHA-256 b242cab9855322d5…

MALICIOUS

PDF

72.6 KB Created: 2021-02-24 18:16:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: c13ee3f2bd0133b8efc9c712b8933aa7 SHA-1: 519db69f867a1d3a1e7c45ade8ff1dec019f91ae SHA-256: b242cab9855322d588dbc45831ef8d5095e3818f0d0e8f7cb1a464ed2a520853
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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.
  • 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.
  • 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://yafferge.ru/aws?utm_term=intro+to+javascript+programming In PDF document text
    • https://cdn-cms.f-static.net/uploads/4387566/normal_5fe7df5e74591.pdfIn PDF document text
    • http://takavejesutep.iblogger.org/vijaleradepolubekefose.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450148/normal_5ffb4054d7c14.pdfIn PDF document text
    • https://cdn.sqhk.co/zarepowake/bRigFhd/digazidudawowusutudoxuna.pdfIn PDF document text
    • https://mototide.weebly.com/uploads/1/3/2/7/132710683/merudepa_nowirov.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379602/normal_5fe7621b4c3e7.pdfIn PDF document text
    • https://timijajuvage.weebly.com/uploads/1/3/2/6/132683040/zagofu.pdfIn PDF document text
    • https://jidedenevunuva.weebly.com/uploads/1/3/4/4/134498736/mivezefutaseba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490263/normal_5fe825d513070.pdfIn PDF document text
    • https://piluzixalevuj.weebly.com/uploads/1/3/5/3/135345731/6a746e8cba76.pdfIn PDF document text
    • https://jagunafine.weebly.com/uploads/1/3/4/3/134363358/wuxegum.pdfIn PDF document text
    • http://xolimaked.iblogger.org/apush_chapter_26_test_answers.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/povelenavuviw/nefirojabo.pdfIn PDF document text
    • http://xesijapapun.rf.gd/bixapiviwosozepinabiza.pdfIn PDF document text
    • https://s3.amazonaws.com/nufidibodudulad/ableton_live_9_crack_32_bit.pdfIn PDF document text
    • https://s3.amazonaws.com/bofake/goxagaxa.pdfIn PDF document text
    • https://s3.amazonaws.com/rutufokedizon/64807798758.pdfIn PDF document text
    • http://ponadik.epizy.com/brain_death_eeg_report.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_off0000de29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE29 5292 bytes
SHA-256: 2f7d09527dacbd6b3e1fd0cc7d5b1b48d34bd325e686bb33d74f11a151115509
font_01_sfnt_off0000f028.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF028 10980 bytes
SHA-256: fd4c9ec287470e9405307073bb8873dce6dedc953606e914c4a3c3d421b3f024