Malicious PDF — malware analysis report

Static analysis result for SHA-256 7773699f4cc0393c…

MALICIOUS

PDF

66.1 KB Created: 2020-12-07 09:40:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 3f6db28b9ffc7b7c1ae474614f1d323f SHA-1: a798c8324310812aff2f31c6cc3df2b4d63195ba SHA-256: 7773699f4cc0393cc64e4d236fba1c4e337109532f76d2abd5691b04ef4cac40
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://trafftec.ru/aws?utm_term=energia+eolica+concepto+pdf PDF link annotation
    • https://riragojefo.weebly.com/uploads/1/3/1/8/131857115/c03476ea8047827.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446388/normal_5fb44b8f4a3bd.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/132440ee-a705-49cb-92bf-35a14c48a382/53935428457.pdfIn PDF document text
    • https://s3.amazonaws.com/bulujono/1831068039.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0173005a-4f51-455e-9b7c-572a75bfb42b/50364982714.pdfIn PDF document text
    • https://s3.amazonaws.com/joterige/fujukurulamej.pdfIn PDF document text
    • https://s3.amazonaws.com/limewub/93028178193.pdfIn PDF document text
    • https://s3.amazonaws.com/vekodupiwarobi/mesoratawidefaxiz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d2c6e629-d3cb-4391-b400-af27c151e18a/pokemon_dark_rising_3_release_date.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc58fdd12facd59ceccb3b2/t/5fcc2bdcc836a917f9fdd619/1607216092978/lawiziwuxe.pdfIn PDF document text
    • https://s3.amazonaws.com/mubefula/64627909739.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbcf6331491241adc4506cf/1606219316334/89185993516.pdfIn PDF document text
    • https://s3.amazonaws.com/tugumeb/rawadufaxaxobuzogolufazor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9a2d1925-77dd-4ca9-a219-00f2c494edd6/pobagevupurunuwegaramozo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b08234dd-a18d-4626-a7ec-7e6eb29c829d/the_tragedy_of_the_commons_worksheet_answer_key.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_off0000c4e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4E5 5104 bytes
SHA-256: 51eb0eafac4834226274774513099a78873e17b7f80c32eb7cf0253c33f179e2
font_01_sfnt_off0000d658.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD658 11076 bytes
SHA-256: 57e0afce657acf90621306f5fe6f972f2059be568eb4b1deaeadb47d0d10d5d6

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