Malicious PDF — malware analysis report

Static analysis result for SHA-256 d994d66d918c8009…

MALICIOUS

PDF

70.6 KB Created: 2021-02-19 03:02:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: b2922cd57f101a894f8b228118c44eed SHA-1: cc26387e643ae9c0ef2d74a5e5630621ffb2261c SHA-256: d994d66d918c80095cc87515da5b1349954efb2a62c6be4a88ea0efe2ce1cfd7
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://leonvi.ru/aws?utm_term=a%252B+guide+to+managing+%2526+maintaining+your+pc+8th+edition+pdf+download PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4475586/normal_5fd7d12c6a592.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450514/normal_6023f832e41e0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464720/normal_602dceaa5cdda.pdfIn PDF document text
    • https://luvabuzizav.weebly.com/uploads/1/3/5/2/135294148/8310933.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408864/normal_5fddb19a94601.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409123/normal_5fc602312ce09.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383912/normal_60148e0cb3dfd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4487905/normal_5fce3de412274.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449009/normal_5fcb32bd20932.pdfIn PDF document text
    • https://rajilogibakew.weebly.com/uploads/1/3/5/3/135326989/8905388.pdfIn PDF document text
    • https://wigitofeza.weebly.com/uploads/1/3/2/6/132682623/5733593.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/widiku/carding_machine_electrical_diagram.pdfIn PDF document text
    • https://s3.amazonaws.com/vuxagixil/formation_chef_d_entreprise_deduction_fiscale.pdfIn PDF document text
    • https://s3.amazonaws.com/mavixu/14519969223.pdfIn PDF document text
    • http://tikumomono.rf.gd/dewibujo.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_off0000da52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA52 4828 bytes
SHA-256: 834c189e3267af7e5e12c7725b6134de3026670e70a043dc7493fa1a7da6352c
font_01_sfnt_off0000eaaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAAF 10380 bytes
SHA-256: 3fb31d3c42c7ef27de314a748b5cbe5cf7cb46645356439201a6e3d0e2fe1ecf