Malicious PDF — malware analysis report

Static analysis result for SHA-256 07bc973ecde7b463…

MALICIOUS

PDF

46.1 KB Created: 2020-10-02 16:41:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: a17238f2e9c6199ae2d000fb9b1f0e82 SHA-1: ac24766243c38f1bac21906b1519dab8cf5e0a6d SHA-256: 07bc973ecde7b463098bae1d11700828e1b18ef5915fcf67ca974c5ff7d09e35
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • 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=calculo+de+cargas+termicas+calefacci In PDF document text
    • http://files.thomasgkelleylaw.com/uploads/1/3/1/4/131406413/f39026aa.pdfIn PDF document text
    • http://files.orrvillefireinthesky.com/uploads/1/3/1/3/131383737/8942151.pdfIn PDF document text
    • http://talavuge.re3institute.org/uploads/1/3/0/9/130969476/1bccb8f.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/4a587462-8805-4fd8-b909-fa1edb639398/wikivegoveg.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a6a7883b-0ff8-4081-9498-aad994f502b4/25481614904.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/79905cd9-ceed-4f70-97c8-077b4cb0314f/84421255300.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db633b42-a29b-4c7a-8c3f-82770625c174/10127860870.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/633087ab-4645-4bd2-84ff-5adbc8205ce0/4326374202.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/df799415-a008-41e8-b097-5c85e5c9c719/jetegawonel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/12a27884-340f-4574-baf7-2a0e0938c158/7950641031.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5fad40bd-04ba-4acc-acc4-37a2b506b1bb/94236414492.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/702372e2-f672-42fc-882a-228d1cfc9f8b/zexidiw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c7afd288-9b72-4787-8ce7-222e6b92315f/19651834610.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_off000073c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x73C9 5248 bytes
SHA-256: 100339e56cd9030f5dfde6a3c31b180ca58fd91ee18fe9929b899bac1d79024b
font_01_sfnt_off00008586.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8586 11208 bytes
SHA-256: 125da023c3479d4ef16006419c3dd8a5c6a917e347ce1430766c8793404419cb

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