Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f69025766be92dd…

MALICIOUS

PDF

39.4 KB Created: 2020-10-10 20:41:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: e029363e7f6c65c4d719cdc6d977260b SHA-1: b5e0c5b9cfcf4e5f670c3ad3319184939f657e00 SHA-256: 5f69025766be92ddd637d136aea415e362b472a36e34ea00edba5b18f8fa2e2d
202 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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/strik?keyword=sensor+ultrasonico+hc-sr04+mercadoli In PDF document text
    • http://files.changemakerllp.co.uk/uploads/1/3/1/4/131438405/0f449b2.pdfIn PDF document text
    • http://files.bluffcreekestates.org/uploads/1/3/2/8/132814371/wezomejuxixewe-vegumadu.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/6886c969-b90e-4f09-a398-b0ba35ce704c/29474296533.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c93f5d68-c9d3-454c-b27d-4536ca6466d3/banoluluv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0e0055a6-6148-4068-99fd-410cdd0dd21f/93526920690.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/27fb999c-680b-4a5b-b29c-d9fa3ffbeb7d/8239187982.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/7815/9002/files/aquaman_near_me.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/7638/6457/files/nursing_outcomes_classification_noc_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2066/5510/files/tunuluzovirusoze.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6131/2664/files/peer_evaluation_comments.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/6877/9415/files/luburonuzutilelaxuj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5650/4744/files/secret_life_of_bees_test_study_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3434/3574/files/89051615080.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_off00005ab2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5AB2 5544 bytes
SHA-256: 01b2e7ff0612fa693420a87f23543ee17033b5d2df0e2d78653bee671bc2897b
font_01_sfnt_off00006d5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D5A 10348 bytes
SHA-256: cffa983a944dbb43132dde9a013fdbeee30671056b718748a2537d84d23c2de1

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