Malicious PDF — malware analysis report

Static analysis result for SHA-256 aabe93051849cf15…

MALICIOUS

PDF

40.1 KB Created: 2020-11-02 15:11:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: b882609d799340ae8b4f5fea00e5296d SHA-1: 4e3b43771b6c53496b107be3ba001cc7edaddb45 SHA-256: aabe93051849cf151401f0ad6e569c7429a8cd036456ff0f79a76e61efbfc5f6
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=atom+worksheet+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4385852/normal_5f99bbf0701b4.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/jedobufudajewu/laxetilex.pdfIn PDF document text
    • https://s3.amazonaws.com/fuwenoxuzasila/54782303784.pdfIn PDF document text
    • https://s3.amazonaws.com/susopuzupure/bowamakadojudibaran.pdfIn PDF document text
    • https://s3.amazonaws.com/jiguwuzobozobaz/sycamore_junior_high_school_supply_list.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/3488/5319/files/to_kill_a_mockingbird_part_2_quiz.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/katapemexerirexefogikulu.pdfIn PDF document text
    • https://s3.amazonaws.com/mubemutolewe/brave_cazadora_de_hadas_3_descargar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0506/7699/0142/files/cuoh2_decomposition_temperature.pdfIn PDF document text
    • https://s3.amazonaws.com/bawalidamovidud/borotujus.pdfIn PDF document text
    • https://s3.amazonaws.com/remeranexe/4225268800.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/0906/4090/files/parallel_resonance_experiment.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_off00005edf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5EDF 5184 bytes
SHA-256: 7c4ff8b8c3240833d00d287b935cd6ae988ec4390ae051009b2c8f08fb4a1c3b
font_01_sfnt_off0000706e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x706E 10528 bytes
SHA-256: eaf55316bb989bae65acb443111588539f605bff412b5462548a315671d32641