Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb12b0a7f0150482…

MALICIOUS

PDF

35.0 KB Created: 2020-11-05 22:45:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: c93f91a44031bf1d75b1367590b42fa4 SHA-1: cf986c90673b6024ccd84b7f3711f858525462e6 SHA-256: eb12b0a7f01504823cacb7e2c3432c2d6a1f8657c9df0881258cb1dc05ba913f
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://traffking.ru/aws?keyword=central+jr+high+lufkin+tx In PDF document text
    • https://sepubipig.weebly.com/uploads/1/3/4/4/134445985/6658820.pdfIn PDF document text
    • https://vekejuritikoj.weebly.com/uploads/1/3/1/8/131857631/vuregurep.pdfIn PDF document text
    • https://xuzutewoduka.weebly.com/uploads/1/3/4/3/134364923/456413a8ea.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368249/normal_5fa1c56616e48.pdfIn PDF document text
    • https://wugusuza.weebly.com/uploads/1/3/4/1/134131733/nulixekoni.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410443/normal_5f9447ee7fdf4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380525/normal_5f9cc423f283a.pdfIn PDF document text
    • https://pevinuwipe.weebly.com/uploads/1/3/0/8/130873962/dufojateduruxu_molep.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/pewebopufupe/39661106547.pdfIn PDF document text
    • https://s3.amazonaws.com/dalava/38998595112.pdfIn PDF document text
    • https://s3.amazonaws.com/daniwodug/82919036788.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_off00004a51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4A51 4964 bytes
SHA-256: 89a66e0ead168d3fb7b16364a9a90cad660093eba6bdd338fed845de4924bbbf
font_01_sfnt_off00005b3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B3B 10656 bytes
SHA-256: 38e961d15540fcde4b6ab8376637537296bbdb71cbcba311e74605d43016b383