Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3d121277d52dc42…

MALICIOUS

PDF

70.8 KB Created: 2021-02-14 16:14:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 5de77aa48528ec995c10e7cae16d13e2 SHA-1: 053465207e5363367626c26fd77f28ce2866a1ca SHA-256: a3d121277d52dc427486d06191ad1010bfaaaad0aa948c02275c136eec27193e
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/123?utm_term=decorative+balls+for+bowls+amazon PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4446286/normal_6023b13e133e3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450350/normal_5fec09267ada6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383137/normal_5fc6f30b665eb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421205/normal_602872b798285.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478687/normal_602083b7f4011.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486743/normal_5ff28cc7a5f9d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451750/normal_5fd6477b41822.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374366/normal_60246ce612a90.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414680/normal_5fc79172cbaba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376879/normal_5fe9e87d2d6b2.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/jarirotexab/lasagne_sheets_dough_recipe.pdfIn PDF document text
    • https://s3.amazonaws.com/dorulusof/26314690072.pdfIn PDF document text
    • https://s3.amazonaws.com/firigugixujotov/55221323720.pdfIn PDF document text
    • https://s3.amazonaws.com/rizezobabub/gawivexumusesap.pdfIn PDF document text
    • https://s3.amazonaws.com/safenalavojuwu/3422827823.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_off0000d846.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD846 5368 bytes
SHA-256: 8b7177918016e6f484be60267a97f40ac23ba14eff2318f50a503c0bef3d2121
font_01_sfnt_off0000ea97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA97 10668 bytes
SHA-256: 622a6b3eac07aa769f090e901abea93b4f92d48984665a7679bcb88bc92840e2