Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8a049dda2945f61…

MALICIOUS

PDF

46.9 KB Created: 2020-11-02 13:32:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 02e35974758734bc0a56ea400f169096 SHA-1: 2d3338668c9d9217ad2080cd838ad1fbc7bd5ee1 SHA-256: e8a049dda2945f61ccce7020c7d5a5382ca849b660acee3a1ab7132e7cf740cd
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.
  • 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
  • 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://cctraff.ru/strik?keyword=true+refrigeration+service+manual In PDF document text
    • https://gukepofefefika.weebly.com/uploads/1/3/1/4/131437977/8320736.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417040/normal_5f9a48641e28e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366976/normal_5f8d4987481e8.pdfIn PDF document text
    • https://kalodobig.weebly.com/uploads/1/3/4/4/134432105/34396996.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393356/normal_5f9744b5a6046.pdfIn PDF document text
    • https://nudojafobedem.weebly.com/uploads/1/3/1/3/131379550/dinisepomuzejekeged.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372740/normal_5f890beaa32ee.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9182/0711/files/79164319777.pdfIn PDF document text
    • https://s3.amazonaws.com/sevoga/coptic_calendar_new_year.pdfIn PDF document text
    • https://s3.amazonaws.com/tadovu/html_tags.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/595ff94a-bcdf-44fd-af9c-9c154fa25558/50489138257.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_off000078a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x78A5 5208 bytes
SHA-256: 9cb4beacbef862dda32bef636754dc526b7cb3a430a9f427eddf3f64af5d9c9a
font_01_sfnt_off00008a55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A55 10644 bytes
SHA-256: a3a2e958d47b43f41aaaba6e50df53eb5a5a0cc282dce93eca83037ec63392a7