Malicious PDF — malware analysis report

Static analysis result for SHA-256 c492ab43b91c73cd…

MALICIOUS

PDF

70.5 KB Created: 2021-02-21 04:51:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 40114922ba5032088cb045835d2ba8ab SHA-1: 0c880d914815c1b84370bf9ae1feafd84c3aa09e SHA-256: c492ab43b91c73cd6bd29b12f68732534a67aeade2397238dc6b3651e59fc4eb
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/wb?keyword=why%20do%20my%20security%20cameras%20keep%20going%20offline PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4418786/normal_5ff4e3da376f8.pdfIn PDF document text
    • https://cdn.sqhk.co/womawuxinuge/azjiCjV/jewemox.pdfIn PDF document text
    • https://cdn.sqhk.co/movozuba/evidgcT/musalovuxafadekob.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375886/normal_601f1d5eca5b1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380076/normal_60046dabbbabf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459324/normal_5fe35756991fc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445558/normal_600f5a74d47ea.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369332/normal_5fcbeee66a4d0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392873/normal_6007c3c6c15f5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376380/normal_5fd61b8e2aad4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366354/normal_5fee904484e39.pdfIn PDF document text
    • https://cdn.sqhk.co/supuzeren/jgZhcLd/vintage_bingo_pinball_machines_for_sale.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445890/normal_5fd6290ae6481.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388041/normal_6031aea3c99a5.pdfIn PDF document text
    • https://cdn.sqhk.co/rawerusiwala/a9Tjaha/jijojowapopudinuxebemukak.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000d52f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD52F 5748 bytes
SHA-256: a4ed0246b032e2b8bbe8b424a76687686c3d4b903e37e94c499bb2315e7d4edc
font_01_sfnt_off0000e8b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8B3 10716 bytes
SHA-256: 260926376cd2cbed7e7d42927ee20ed4cf7fc9986ae021aef0711bce64fb5ce6