Malicious PDF — malware analysis report

Static analysis result for SHA-256 61222f485da98cb4…

MALICIOUS

PDF

74.8 KB Created: 2021-02-12 10:54:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: 98166d4cc46800a46bd0b1711850c6d1 SHA-1: a0770e58c11de6dca31cf6a3de24754cd97e5419 SHA-256: 61222f485da98cb4f60ad4524f4f5c712ac912445d43f4634ba161b9d80b010c
204 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://druttle.ru/wix?keyword=how+to+unlock+a+word+document+for+editing+on+mac PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4387819/normal_6005646db2f95.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469617/normal_601dbf9d7e393.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417032/normal_5fddd89f09278.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417140/normal_6004973e3ea7e.pdfIn PDF document text
    • http://lamatokatov.22web.org/55659004049.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367643/normal_60026bf7c4c93.pdfIn PDF document text
    • https://vosanuxavuzom.weebly.com/uploads/1/3/6/0/136089669/0e0e1d8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477873/normal_6016c361ad811.pdfIn PDF document text
    • http://mabirimelu.iblogger.org/b._ed_cet_admit_card_2018.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415782/normal_6014a5969615b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477139/normal_601172358a127.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dowirimidezifa.rf.gd/78639286275.pdfIn PDF document text
    • https://s3.amazonaws.com/tuletivotarupu/medullary_thyroid_cancer_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/risalenefazozo/81039686087.pdfIn PDF document text
    • https://s3.amazonaws.com/zesixefe/begogezepewetezawoju.pdfIn PDF document text
    • http://xilavugepiw.rf.gd/hesi_grammar_practice_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/woxotopapozokev/92686017037.pdfIn PDF document text
    • http://laxaguwen.epizy.com/65676924883.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_off0000e94c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE94C 5280 bytes
SHA-256: 78636420488774c41da157750feadff64101795d237995a8579486079dee6526
font_01_sfnt_off0000fb43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB43 10016 bytes
SHA-256: 7d3458c86d07d2a865caf5f7aa9cb84b685ee5166124fcdaae5689ad16b61167