Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3d9a173ebf8d8e3…

MALICIOUS

PDF

74.5 KB Created: 2021-03-01 22:37:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 730bdf8cba447515a77af0d33c0ec9c7 SHA-1: b3e1b71a7f7e37e668cc36ae387651196b8e88b4 SHA-256: d3d9a173ebf8d8e36d26a6a31ec26b7974141ed99951fc43be7b74f13454356b
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://vilenefex.ru/wix?keyword=only+a+lad+oingo+boingo+lyrics PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4378152/normal_602c5dcb07389.pdfIn PDF document text
    • https://cdn.sqhk.co/bexefoboxevi/bHJvsMZ/breakwall_bbq_menu.pdfIn PDF document text
    • https://tewutenuka.weebly.com/uploads/1/3/2/6/132695339/329079.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497358/normal_5fd5f81634530.pdfIn PDF document text
    • https://wilegefozuf.weebly.com/uploads/1/3/4/3/134399327/3057110.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455381/normal_603555828ba1f.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/jivuxo/76964032584.pdfIn PDF document text
    • https://s3.amazonaws.com/buwosevax/fowowanewefunonopegetok.pdfIn PDF document text
    • https://s3.amazonaws.com/tifuwuw/nezujezegof.pdfIn PDF document text
    • https://s3.amazonaws.com/kosamupim/miwerejesunuxawawalovuli.pdfIn PDF document text
    • https://s3.amazonaws.com/zamemigojat/bigiriwozitapafejiw.pdfIn PDF document text
    • https://s3.amazonaws.com/xenavuxa/wulubebagaboko.pdfIn PDF document text
    • https://s3.amazonaws.com/toniseligiwuzux/aggiornamento_android_per_asus_zenfone_2.pdfIn PDF document text
    • https://s3.amazonaws.com/zowejunef/agriculture_problems_in_pakistan.pdfIn PDF document text
    • https://s3.amazonaws.com/nakevoja/sefafovikafopunopomulix.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_off0000e650.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE650 5376 bytes
SHA-256: 521e0ea5b7141e49cf10a373b2beced7f6aef5c291f6b94480b5eb5a3ba56407
font_01_sfnt_off0000f8a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8A6 10708 bytes
SHA-256: 441b75cc978b2157de78536f25b2ddb582ebd9c7006f74b1e4ff0741df247cbf