Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b03a52433d1ae73…

MALICIOUS

PDF

71.8 KB Created: 2021-02-08 18:15:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 3e675d8dd944aeba07a51849a6b494fb SHA-1: 3c2a12636e0707815df4fd504a8647933ec9d8cb SHA-256: 3b03a52433d1ae7380c822da5d3cce465040fbf66a5a36a3aa77bdb694647cf4
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://maypoin.ru/123?utm_term=mcdougle+middle+school+staff PDF link annotation
    • https://cdn.sqhk.co/bafesugoguwi/chdAxgd/65602674504.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451374/normal_5ff90cdc6091c.pdfIn PDF document text
    • https://cdn.sqhk.co/bunewonu/hdjiSdM/12121859463.pdfIn PDF document text
    • https://benanuvez.weebly.com/uploads/1/3/0/8/130813453/852504b3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420748/normal_60032f2d5cd69.pdfIn PDF document text
    • https://cdn.sqhk.co/dapubebireba/hhZAgdM/rankin_bass_productions_peliculas_producidas.pdfIn PDF document text
    • https://cdn.sqhk.co/tavikebepo/shbjbHA/vofenururo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4472501/normal_6006b7171251b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420604/normal_60005be3a4fae.pdfIn PDF document text
    • https://cdn.sqhk.co/pefevepufi/wkigjd8/donebepizumutogetaxub.pdfIn PDF document text
    • https://tilawifi.weebly.com/uploads/1/3/4/4/134480999/3876026.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405208/normal_5fd2c49d1a7fe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373753/normal_60199f1ecaee7.pdfIn PDF document text
    • https://vekoduxiboba.weebly.com/uploads/1/3/1/3/131398498/3857204.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/bupesejirijejus/wood_bed_frame_plans.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_off0000dc94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC94 5344 bytes
SHA-256: ccbe7a907589acaff7405d706d8b8f66953fd769340d9b06b35c530982a7b806
font_01_sfnt_off0000eeae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEAE 10432 bytes
SHA-256: 162f3704f93c89ea5f63c2f8333e14f23247f574edb4e60eb4fc45ef75a640c1