Malicious PDF — malware analysis report

Static analysis result for SHA-256 86a3c007f7f220af…

MALICIOUS

PDF

55.1 KB Created: 2020-10-09 12:16:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 6215d9e8f054ac3e211e906932c11a1e SHA-1: 10671982f51ff0dfd6aa8b5ff6dac9d87a7f872f SHA-256: 86a3c007f7f220aface8d590b7a796ac48ab679f5b9e4491faa081ad5d067e79
134 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://ggtraff.ru/pify?keyword=army+sf+701 In PDF document text
    • http://files.stmichaelsmaronite.net/uploads/1/3/1/3/131383681/9948210.pdfIn PDF document text
    • http://files.edisonamigos.com/uploads/1/3/1/8/131856904/xesuwuzovova_fixazonotebewi_jonos_lawofatanoki.pdfIn PDF document text
    • http://fodexa.perchancetheatre.com/uploads/1/3/1/3/131384600/a803713e2fb1d8.pdfIn PDF document text
    • https://site-1036697.mozfiles.com/files/1036697/fowote.pdfIn PDF document text
    • https://site-1041206.mozfiles.com/files/1041206/50322068470.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9712/0151/files/the_path_made_clear_by_oprah.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/4027/6131/files/92624900543.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/6694/4405/files/83079115477.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0494/1548/7655/files/family_tree_worksheet_for_grade_2.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c419fb1-3c63-4ff4-ad92-1cb81bc92bb6/83596614459.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bc5da1ce-f6be-4e1a-b7fc-867cd50ccafe/20004953829.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3fb2bcf0-7b33-46fd-92cb-7b98bda76d59/wekebijigesanulerupaxut.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b893721-799c-4e26-8e1e-72ebc4e0602f/13434152951.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008d9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D9B 4360 bytes
SHA-256: 6d3238bac97617b4152862732269695087640e6d575b9bc9b84b2e445b6bb3f6
font_01_sfnt_off00009c5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9C5E 10972 bytes
SHA-256: 1fcc0c4422c7c273de9a583ad67181c69e586c4968ff1bf8096a1e2ca1d75beb
font_02_sfnt_off0000c1db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC1DB 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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