Malicious PDF — malware analysis report

Static analysis result for SHA-256 73588b51b4827563…

MALICIOUS

PDF

72.4 KB Created: 2021-01-26 04:22:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 9fc09cc74954845b5e3d6dc38c720992 SHA-1: 6e7bac6cfb9cac79596126967a8487b14b89df18 SHA-256: 73588b51b482756389da68c28dbe89135f910c9dc2bba5b89857f68f9f94dce4
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://bologen.ru/aws?utm_term=amboseli+institute+fee+structure PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4382193/normal_5fd80f5544ca6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408188/normal_5fff6dade2af6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390681/normal_5ffa271a72a48.pdfIn PDF document text
    • http://astrology-personal.online/dragon_goddess_of_borneopfadl.pdfIn PDF document text
    • http://fabermanufacture.ru/939322229g4o07.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426966/normal_5fffd65da8152.pdfIn PDF document text
    • http://fb-ig-violation.com/womens_halloween_costumes_2020_ideasn03mq.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417212/normal_5fcc8b046ede7.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/towakog/89017556786.pdfIn PDF document text
    • http://repeputowuz.epizy.com/wondershare_editor_watermark_remover.pdfIn PDF document text
    • https://s3.amazonaws.com/lomogas/panasipep.pdfIn PDF document text
    • https://s3.amazonaws.com/juduk/chori_chori_song_salman_khan.pdfIn PDF document text
    • https://s3.amazonaws.com/wixamupelinere/33744811289.pdfIn PDF document text
    • https://s3.amazonaws.com/wujodibu/62174522350.pdfIn PDF document text
    • https://s3.amazonaws.com/xupovobejanam/35365917982.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_off0000dd1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD1B 4944 bytes
SHA-256: e1bb0e96da5a79d3e1356cb90270c4f849c5b81c0fb646a845624b213a60ecca
font_01_sfnt_off0000eddc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDDC 10956 bytes
SHA-256: 45baa4cb3646810204c5dd10ad68edcbf6e16c875836b39e9cdc4cc28a17def5