Malicious PDF — malware analysis report

Static analysis result for SHA-256 670b96da965534d1…

MALICIOUS

PDF

39.8 KB Created: 2020-11-05 22:48:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 198217a2cb98fff51a34786fec39bb24 SHA-1: 091cbd23e60c7a78d25e7bd0556f0212f9e43328 SHA-256: 670b96da965534d1061b01464060371e69fea0316522bb2d9c7d14daa1be5edd
144 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://traffset.ru/aws?keyword=pictures+of+aztecs+homes PDF link annotation
    • https://kowabimope.weebly.com/uploads/1/3/4/3/134359524/1122486.pdfIn PDF document text
    • https://xogexemufak.weebly.com/uploads/1/3/1/4/131437987/mowuruzovem_rasij_lakupako_madikomojuzom.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/5dfb1bbf-fdd4-4270-9de4-8ab44bcd97b8/13715736915.pdfIn PDF document text
    • https://s3.amazonaws.com/zaxawetawupo/2280037773.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6906af67-399e-4961-8c17-93f253d2aef8/house_upgrades_stardew_valley.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/4058/3061/files/jatorimedebero.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d9f336f1-be42-4c47-9a4d-a594f00b3d10/how_to_save_a_visio_file_as_a.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/66c3a169-e752-4e1e-9a82-ff92fc345d7a/51509762170.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d665e9d5-857e-4b14-99c0-1d77dace5eb1/10534327774.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8b3a089e-80c8-48c9-944f-c68883829c87/6774624872.pdfIn PDF document text
    • https://s3.amazonaws.com/pibabopuduj/ludovico_ariosto_orlando_furioso.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/87bb1c1c-4df1-475f-9298-b67fdeb4377b/14662025245.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bfc8e754-b21d-420d-acea-70f9c0fdfe0c/no_meat_athlete_supplements.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_off00005e0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E0A 5140 bytes
SHA-256: dc76e8977a329cbf4d43adef1b3f667b538f2b137c255ab942163554db7d7b97
font_01_sfnt_off00006f68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F68 10364 bytes
SHA-256: 3b6064bd3d9aa09d5e85acc547e0b5b9cb0c59dc9c7fc0273fcbceb3bc793776

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