Malicious PDF — malware analysis report

Static analysis result for SHA-256 81ee284613a10b3f…

MALICIOUS

PDF

65.6 KB Created: 2021-02-15 10:25:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 98e35b7d762a2bd524c554282584c2e7 SHA-1: e4e46eb7de7da56c9687d0a597c9ce7f1522e588 SHA-256: 81ee284613a10b3ff6bea79900f319b8c3f11deee3309a5f336636de5e96bc0d
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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/wix?keyword=word+problems+with+integers+worksheet+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4456671/normal_5fd397f0a98ff.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476939/normal_600274aa7771d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482858/normal_5fcc1f67d04b7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393506/normal_6029a347a6493.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491398/normal_5fd348f770447.pdfIn PDF document text
    • http://abanca-electronica.com/sofudepoduwakowgv4u.pdfIn PDF document text
    • http://cosmosqrab.online/786365945051199p.pdfIn PDF document text
    • http://themarkuzmusic.com/ct_guided_sacroiliac_joint_injection_technique4yz0n.pdfIn PDF document text
    • http://reactivaperu-2020.com/694113400044781g.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/pegozegi/susobaxogotoxaf.pdfIn PDF document text
    • https://s3.amazonaws.com/simujix/32186712060.pdfIn PDF document text
    • https://s3.amazonaws.com/xixonu/86246803679.pdfIn PDF document text
    • https://s3.amazonaws.com/fedufiporara/xirunop.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_off0000c3e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC3E3 5556 bytes
SHA-256: f130a7a579a158799672f90b8667c29df50c4d7bc23faf920d8864b7ec0b2c96
font_01_sfnt_off0000d6b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6B3 10176 bytes
SHA-256: 5a6d3c2449e08fe9ac6135f9f0d626e24c9a72f42af4e0828b2f70ec3b503197