Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d3cabe6837f641a…

MALICIOUS

PDF

68.6 KB Created: 2021-02-18 14:13:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 16c07cdc002585f6088438c612164e9d SHA-1: 11a96854b17932b83737dcd290cc66a9e2887f69 SHA-256: 4d3cabe6837f641a8ca68d7fac7a81e7acf073c499c6dcee0d949b19d111906c
136 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
  • 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://baarspo.ru/wix?keyword=root+polaroid+apk+gratuit PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4369654/normal_5fd320e23f81e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446921/normal_601e0b86a8e38.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445331/normal_5fddd9f95d388.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495686/normal_5fdee4995cb18.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501980/normal_602dd6d740f7f.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/ninasivol/types_of_assessment_strategies.pdfIn PDF document text
    • https://s3.amazonaws.com/jolituzoji/75128760106.pdfIn PDF document text
    • https://s3.amazonaws.com/titugome/sogivitoloxije.pdfIn PDF document text
    • https://s3.amazonaws.com/mivokozibu/72830483248.pdfIn PDF document text
    • https://s3.amazonaws.com/sedimeraxufi/29221449934.pdfIn PDF document text
    • http://milodip.epizy.com/29221352748.pdfIn PDF document text
    • https://s3.amazonaws.com/pevarijidasalop/48328245697.pdfIn PDF document text
    • https://s3.amazonaws.com/rubidokezive/puduvipobaz.pdfIn PDF document text
    • https://s3.amazonaws.com/jazofi/64061370024.pdfIn PDF document text
    • https://s3.amazonaws.com/nalifij/77004284884.pdfIn PDF document text
    • https://s3.amazonaws.com/welanisowari/phonak_marvel_app_for_android.pdfIn PDF document text
    • http://vakutasuv.epizy.com/bd_map_app.pdfIn PDF document text
    • https://s3.amazonaws.com/bajapovogam/cystitis_treatment_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/pivetuzadujo/senorita_karaoke_with_guide_melody.pdfIn PDF document text
    • http://zorogeloma.epizy.com/dji_aeroscope_user_manual.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_off0000d1d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1D0 5020 bytes
SHA-256: 5b61fe8c21450e4286cd70cb6b76c2a662b0c82c6fac501ce155c0288ca02033
font_01_sfnt_off0000e2fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2FB 10104 bytes
SHA-256: 3ffdaae183e6f7af7bf784b68b28788acb1e9029bbd36f022aca43b2b9c45149