Malicious PDF — malware analysis report

Static analysis result for SHA-256 34c12a4d986654d7…

MALICIOUS

PDF

53.8 KB Created: 2020-11-09 10:19:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2022-06-20
MD5: 8a33eea5c7d52270f17028724c623e0d SHA-1: 3aad3a858ac8e3f065cf2b1470c35f964392c7da SHA-256: 34c12a4d986654d735645623a375cc6cb687751e912a74db92fae1a3fa0bd9f3
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=emotional+rescue+mn In PDF document text
    • https://cdn-cms.f-static.net/uploads/4378153/normal_5f8b3fecf2f3f.pdfIn PDF document text
    • https://gejatovuri.weebly.com/uploads/1/3/1/4/131406669/bemona_gumakivakizag_komusaviji_fepadevepu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378149/normal_5f9dd4ae0481b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370280/normal_5f8f010a0a5ba.pdfIn PDF document text
    • https://pisanofinupu.weebly.com/uploads/1/3/1/4/131437881/ee72e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379049/normal_5fa67d49a353c.pdfIn PDF document text
    • https://zesopupejilit.weebly.com/uploads/1/3/0/7/130738861/afa7ee664f026.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457561/normal_5fa51eaeddc5e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380531/normal_5f947cb482f09.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365655/normal_5f874bd4e4559.pdfIn PDF document text
    • https://kizekusoviwo.weebly.com/uploads/1/3/1/4/131453028/faxoxefite-nidaxa-tikewagufokid.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418385/normal_5f9a0676cb95f.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/kitakilesa/10325626313.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_off00009649.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9649 4904 bytes
SHA-256: 07862c67f6bf313a46cbf4cf3f24e03e1e9dc107cfbace274aef5e79a8ebb6d5
font_01_sfnt_off0000a6d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA6D8 10664 bytes
SHA-256: 917efee4ac8f68eff69239372e95043c9d603a04a0457e126a3b247d4a4cd985