Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec4797654769455a…

MALICIOUS

PDF

43.8 KB Created: 2020-11-03 09:46:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: e8563d568e601182411dfaa98d4f93de SHA-1: 7abf727cd9e609eb9203bff91994bd242bae03c2 SHA-256: ec4797654769455a801ae86fdf0effb9fa2a750844618c41c691d7e07fc80f78
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://ggtraff.ru/aws?keyword=aftershock+robert+reich+pdf In PDF document text
    • https://papunagaku.weebly.com/uploads/1/3/1/3/131384156/jebawuba_sorowujuwadidu.pdfIn PDF document text
    • https://sakukavazu.weebly.com/uploads/1/3/1/3/131379729/semejolen.pdfIn PDF document text
    • https://finazodaxuvoj.weebly.com/uploads/1/3/2/6/132682535/5df6056e9a3fa4.pdfIn PDF document text
    • https://nogomikosisodop.weebly.com/uploads/1/3/2/6/132681488/vajupoxakobotoga.pdfIn PDF document text
    • https://fodezamu.weebly.com/uploads/1/3/1/4/131407453/wijigomofiweb_lotitosede_jukis_dirum.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/felasorarabipis/mibanifexuxeximewezaj.pdfIn PDF document text
    • https://s3.amazonaws.com/biwubeleba/andrew_yang_book_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files2/anatomy_nervous_system_test_questions.pdfIn PDF document text
    • https://s3.amazonaws.com/pazifetanegapu/fesojesirivimunud.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8602/0775/files/strength_program_for_crossfit.pdfIn PDF document text
    • https://s3.amazonaws.com/datarofapakil/xuwebobe.pdfIn PDF document text
    • https://s3.amazonaws.com/widiku/scientific_method_worksheet_high_school.pdfIn PDF document text
    • https://s3.amazonaws.com/tulosa/dolanibiwitadalajoxat.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0503/2725/7271/files/scholastic_guided_reading_level_c.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_off00006c81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C81 5192 bytes
SHA-256: 7ba7cff927dd3c445bffb7c761281e18fca6c0243597822f12c84ae63c7a3c4a
font_01_sfnt_off00007e28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E28 10264 bytes
SHA-256: 4e99f63c1bcddf713fa0051f90bf0253f68b8c420916aaec79363afa0408e09f