Malicious PDF — malware analysis report

Static analysis result for SHA-256 308bb78fea387cce…

MALICIOUS

PDF

76.5 KB Created: 2021-02-22 03:19:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 1989a497905a76c4d814f383fcd57d63 SHA-1: ef1629a46675f4ff2aa638da90ebb94dacff382a SHA-256: 308bb78fea387ccef02e2a9a9c99abd8dbb8a238247944c466ae850da23b1755
144 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
  • 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://jottigo.ru/wix?keyword=advanced+download+manager+apk+for+fire+tv PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4470223/normal_6030fa424ee83.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456660/normal_6013f460ac53f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460457/normal_602649813fa04.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451376/normal_6023ba687d842.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368958/normal_5ff0daa6aa144.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367927/normal_5fdc0a78e4d20.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4457332/normal_5fcabae605a8e.pdfIn PDF document text
    • http://fly-drive.online/nhc_thiu_nhi_c_xe_cn_cuvsi5c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387711/normal_5fd676fbbf071.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422372/normal_60136839babde.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466368/normal_600a76f5e15c4.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/rerinago/sas_statistical_program_free.pdfIn PDF document text
    • https://s3.amazonaws.com/jedadokuti/melanaremezopojilusibej.pdfIn PDF document text
    • https://s3.amazonaws.com/wulotugadag/10982851064.pdfIn PDF document text
    • https://s3.amazonaws.com/tubupejevomo/accredited_investor_formed_for_the_purpose.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_off0000edd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDD1 5504 bytes
SHA-256: 0e15748c5f3f941689a68f141a84d7a79a66a47dc3227f89477d8c86ba079854
font_01_sfnt_off0001008f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1008F 10704 bytes
SHA-256: 4b8141faedb5eb72faf2ff899a07e3755a4a89f197495f22d7d778c2bfdbda29