Malicious PDF — malware analysis report

Static analysis result for SHA-256 78c15530e1834600…

MALICIOUS

PDF

39.8 KB Created: 2020-11-03 14:01:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-15
MD5: 34d9f2c7910796ae57927f572961dcb7 SHA-1: 187bea52bd93c1ab89fcc228d1e72eeed1f5b197 SHA-256: 78c15530e1834600aee87a75b008b0621575b75c21c45eb31a7f4d9de57f2b73
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://cctraff.ru/aws?keyword=universal+lg+tv+remote+app In PDF document text
    • https://cdn-cms.f-static.net/uploads/4384640/normal_5f914413f05ed.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370528/normal_5f88a9680e53f.pdfIn PDF document text
    • https://zotorakiv.weebly.com/uploads/1/3/0/7/130739478/8264358.pdfIn PDF document text
    • https://xogexemufak.weebly.com/uploads/1/3/1/4/131437987/f5938ae993d5266.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366319/normal_5f8757c73f949.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374518/normal_5f908503d8cba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368471/normal_5f92e3090aa0d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369504/normal_5f9a2f67e7fbb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385648/normal_5f99312d9afe4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408711/normal_5f9af5f752914.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/zevutebulaworel/wodefutet.pdfIn PDF document text
    • https://s3.amazonaws.com/badodemebo/40229731860.pdfIn PDF document text
    • https://s3.amazonaws.com/zevutebulaworel/arnold_schwarzenegger_movies_full.pdfIn PDF document text
    • https://s3.amazonaws.com/besafefaf/51262992332.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/65461161063.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_off00005d7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D7B 5192 bytes
SHA-256: 0872aad1ca723801d6eaadacc5dc0b38f7b73eae86bb25e2a484fc2a863fe8ef
font_01_sfnt_off00006f1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F1A 10496 bytes
SHA-256: 380ed67539facd4720813fbd1514bb97393945e1753e2ce1c0f1433045b3bf29