Malicious PDF — malware analysis report

Static analysis result for SHA-256 58ac2d3675a27754…

MALICIOUS

PDF

45.9 KB Created: 2020-11-03 19:19:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 6675b35d116a7c88aca564ec644491f6 SHA-1: d09ce282921f45d196b17f7c68d4f8f6414b2fa4 SHA-256: 58ac2d3675a2775451aa4855da685fa1d7e9f5fd60b53c81125b8f6b07662263
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://ttraff.cc/123?keyword=social+work+assessment+tools+for+children In PDF document text
    • https://wetuxabo.weebly.com/uploads/1/3/0/8/130873937/runivokokovagis_tusabu_rimetol.pdfIn PDF document text
    • https://getedizexagan.weebly.com/uploads/1/3/0/7/130740146/xigepo-xunel.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/vexosafugunu/16011896798.pdfIn PDF document text
    • https://s3.amazonaws.com/pazerogasarinu/nurowabimijonikunimaf.pdfIn PDF document text
    • https://s3.amazonaws.com/vetamedisoz/vaxabuzuritisixa.pdfIn PDF document text
    • https://s3.amazonaws.com/soxukowotomaj/gewudasinudididaxefam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1eed15a2-ea81-486c-b8bb-cd3bc9160a6e/kpeklerin_insanlarla_iftlemesi.pdfIn PDF document text
    • https://s3.amazonaws.com/rovikibixu/53952526507.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxadol/vakojunabekijiverilevepi.pdfIn PDF document text
    • https://s3.amazonaws.com/jamokaroxoj/fedawefeke.pdfIn PDF document text
    • https://s3.amazonaws.com/tetazino/taxonomy_of_fungi.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000065ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65EA 5308 bytes
SHA-256: 0f4446c9f28cff0e0094c326f3598adfdf63783ea887bbbe00baa45d168269ff
font_01_sfnt_off000077c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x77C6 11212 bytes
SHA-256: 17b9f9db813c2bd9e37dfecaca0744a5dddcd389bf83511fdeaf5eae7ea069ea
font_02_sfnt_off00009cbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9CBD 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71