Malicious PDF — malware analysis report

Static analysis result for SHA-256 9af46da4a7c16575…

MALICIOUS

PDF

69.6 KB Created: 2021-02-23 10:53:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: fcd27cc072508c95a16468166ddd0917 SHA-1: 545bac641fdf538c2b5cd0193c1c149fd28e6105 SHA-256: 9af46da4a7c16575073f47a1cc2f6f78cd7e087eda02e0cc8aef9d131bd63402
256 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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.
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://jagunafine.weebly.com/uploads/1/3/4/3/134363358/xesidofupamijorazu.pdf.
  • 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://druttle.ru/wix?keyword=buy+google+ads+accounts PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4373240/normal_60199f38062f4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382627/normal_6028229d9f5bd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4456114/normal_5fff15081343a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425916/normal_60291ff935889.pdfIn PDF document text
    • http://pipexob.66ghz.com/leukemia_ppt_template.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368781/normal_602fc96ca0a61.pdfIn PDF document text
    • https://jagunafine.weebly.com/uploads/1/3/4/3/134363358/xesidofupamijorazu.pdfIn PDF document text
    • https://zezawimikosalef.weebly.com/uploads/1/3/5/3/135329884/bodekoxone-kifatadalalo-xekemomag-kifekotuvi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482407/normal_5fd38dc584b6c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486365/normal_6027bcfd3fb0e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460447/normal_5fdc2aaa3a6d7.pdfIn PDF document text
    • https://zugufirit.weebly.com/uploads/1/3/1/1/131163535/0f8653bd99a67.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000d282.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD282 5160 bytes
SHA-256: 87f561d6477a73a4ef9dfadecb0978f524577b1c984a221ecfd23d32adfd3c34
font_01_sfnt_off0000e437.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE437 10984 bytes
SHA-256: 81127efd1432b8e03fa932c2006f668e7a187519c7e2b2896e74b60da0e14c24

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