Malicious PDF — malware analysis report

Static analysis result for SHA-256 309d6b5bb09f8eff…

MALICIOUS

PDF

42.9 KB Created: 2020-11-06 11:45:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: a8ca3a25acb04f839cceab95698da352 SHA-1: 03cf99c6c3f169ac2aaab7c7b64c905382cb3c8f SHA-256: 309d6b5bb09f8efff20a9375d85977af78fc9f3b306fd5095dac1ed32c53dd44
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=smmt+2020+forecast In PDF document text
    • https://sixapinipuso.weebly.com/uploads/1/3/1/3/131384402/9421787.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/jixerubowi/human_population_growth_doubling_time_worksheet_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/voxazedisula/49770829258.pdfIn PDF document text
    • https://s3.amazonaws.com/kovilowab/27284953551.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/783a9a4b-09fe-47a7-a4cd-cfd078124a26/jepoduzux.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/310d4b4c-3e4c-42d4-839f-f80c859a657d/transferencia_de_calor_por_conveccion_ejemplos.pdfIn PDF document text
    • https://s3.amazonaws.com/donake/11719272791.pdfIn PDF document text
    • https://s3.amazonaws.com/jijumupade/riesgo_de_trabajo_imss.pdfIn PDF document text
    • https://s3.amazonaws.com/podawakumepewez/the_cartoon_guide_to_chemistry_larry_gonick.pdfIn PDF document text
    • https://s3.amazonaws.com/bidivo/17914565903.pdfIn PDF document text
    • https://s3.amazonaws.com/baritexovopa/jepakikutom.pdfIn PDF document text
    • https://s3.amazonaws.com/webipejonavuv/opioids_epidemic_cdc.pdfIn PDF document text
    • https://s3.amazonaws.com/numegubowalonan/woribufubodudet.pdfIn PDF document text
    • https://s3.amazonaws.com/bisegilupuf/3598204894.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c18ae7da-5d86-4672-a08c-e486a4637f70/solukezuj.pdfIn PDF document text
    • https://s3.amazonaws.com/megodipewukitoj/proceso_isocorico.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_off00006a8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A8E 5372 bytes
SHA-256: f705d4303eabf15edc2d28f7a360687c2be570e93dcc9482b8676a5afb420742
font_01_sfnt_off00007cbc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7CBC 10028 bytes
SHA-256: ae67c9d7aede097f546edccc7cc44bec0002909c8f526d8667862c2df1044dee

Open this report in the interactive analyzer, or submit your own file for analysis.