Malicious PDF — malware analysis report

Static analysis result for SHA-256 93989d2ff020e672…

MALICIOUS

PDF

71.7 KB Created: 2021-01-21 11:19:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: d8799baf9482b2788f772c4b11a89d3e SHA-1: d106c1a56ed52e2abdf9ee2d78838b3bdcd26d1b SHA-256: 93989d2ff020e6726bb8289cf7130d192a447313dad12cdaaf28048b8e54ffdd
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://bologen.ru/123?utm_term=cooks+companion+air+fryer+french+fries PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4474722/normal_5fddc303a9ae1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481155/normal_5fdc3f82e0656.pdfIn PDF document text
    • https://site-1168264.mozfiles.com/files/1168264/gujujalepomuwux.pdfIn PDF document text
    • https://site-1172154.mozfiles.com/files/1172154/45768888813.pdfIn PDF document text
    • https://tedotedonux.weebly.com/uploads/1/3/0/7/130775879/ea4e1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485301/normal_5fd3a4c750b07.pdfIn PDF document text
    • https://site-1176782.mozfiles.com/files/1176782/autisme_montrgie_formation.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488558/normal_5fb45f2bc9cab.pdfIn PDF document text
    • https://site-1084368.mozfiles.com/files/1084368/anatomi_pencernaan.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385847/normal_5f9fb815952e6.pdfIn PDF document text
    • https://warapado.weebly.com/uploads/1/3/1/4/131437563/70b71c3b813dba7.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/kevava/xipudafesanu.pdfIn PDF document text
    • https://s3.amazonaws.com/nitatotol/kirilajekiwudawikitudi.pdfIn PDF document text
    • https://s3.amazonaws.com/wizitifowubux/guwenisunefiredokobos.pdfIn PDF document text
    • https://s3.amazonaws.com/jowutoneranemuk/37240170503.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_off0000da1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA1C 5292 bytes
SHA-256: 4da00ab50aed4ff435a39686136014ac3b7c0866ca6bff58bf14d4391cdf3676
font_01_sfnt_off0000ebfa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBFA 11208 bytes
SHA-256: d200d2a58ab69bd0fb1e1a481f3c270279092728d46982f6a15d6aa9001b085e