Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8ba74266693b1d7…

MALICIOUS

PDF

106.1 KB Created: 2020-11-14 20:01:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 831570bc62608616682f1549cdf41cd7 SHA-1: f543245695d3ab6847dfc4bfb246f3f89e9d380f SHA-256: d8ba74266693b1d7d2fe4b0665fd9f26d7282fead8c340e00fdab6d8264da6fd
254 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://gettraff.ru/123?utm_term=tratado+del+diloggun+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4446158/normal_5fa2dce9ada1a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408703/normal_5f9a00167f072.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411511/normal_5f99cb422c432.pdfIn PDF document text
    • https://dejolezeg.weebly.com/uploads/1/3/2/8/132815968/tosetanaj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365655/normal_5f9589e7891fb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424029/normal_5f9f3cd819207.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405194/normal_5faa4a839b4a5.pdfIn PDF document text
    • https://genigudepa.weebly.com/uploads/1/3/1/0/131070712/6023986.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459780/normal_5fa64fc0a76c0.pdfIn PDF document text
    • https://wisizexabebaj.weebly.com/uploads/1/3/4/4/134461468/lusepevaniju_mulanisuwari_nigegenevike_tifomujumovarax.pdfIn PDF document text
    • https://nuvisinuxaxo.weebly.com/uploads/1/3/1/3/131383681/giguxilil.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366384/normal_5f9d263a17689.pdfIn PDF document text
    • https://jupisururixed.weebly.com/uploads/1/3/4/3/134339091/de4818804b6e.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/rorives/tiruvuwuzemiz.pdfIn PDF document text
    • https://s3.amazonaws.com/wexoteluwag/31066602585.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_off000161fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x161FA 4980 bytes
SHA-256: 08773f4d3f59a15063190a9a2dc84ed4c3e7679809aa79c7962ce6124ba132ad
font_01_sfnt_off000172f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x172F9 12260 bytes
SHA-256: 1517eb98929f0a55e6d8468c2c24aad556276bf7525c4d2a37522b594ea5f96c