Malicious PDF — malware analysis report

Static analysis result for SHA-256 eac0288feb529c36…

MALICIOUS

PDF

40.6 KB Created: 2020-10-28 10:28:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: 99875ac754f5a0c022ba273e5a5c7ae9 SHA-1: fcf57206993ad22d0cb9ab1826e53136e7cb9aaf SHA-256: eac0288feb529c360941c30c9b4f5ae6762523a85d7b53b8b057a1abf7601b24
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/pify?keyword=passive+and+active+insufficiency+examples In PDF document text
    • https://zisokilusativ.weebly.com/uploads/1/3/2/3/132303079/4843020.pdfIn PDF document text
    • https://femitinekabel.weebly.com/uploads/1/3/1/4/131437683/b809bb63d.pdfIn PDF document text
    • https://wesojejupeledaw.weebly.com/uploads/1/3/4/4/134446418/viluguneluj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368471/normal_5f87760cd055c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392877/normal_5f943aa42d033.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372985/normal_5f97dd6fdf16c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374956/normal_5f8fda48d8e1c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365628/normal_5f87d4df04c43.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368242/normal_5f8838312a333.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375080/normal_5f8df3c8d6e1b.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off000061b5.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off000061b5.bin)
    • https://s3.amazonaws.com/vipinib/poxokujibew.pdfIn PDF document text
    • https://s3.amazonaws.com/muwemivumazulax/puwaxege.pdfIn PDF document text
    • https://s3.amazonaws.com/forupokisip/66374395889.pdfIn PDF document text
    • https://s3.amazonaws.com/tojabixefova/how_to_make_a_book_out_of_files.pdfIn PDF document text
    • https://s3.amazonaws.com/migivewuwe/algebra_1_homework_practice_workbook_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/vonuxagupeduze/patoxilirusokajezetuwovur.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files2/microsoft_certification_exam_path.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 extracted file (font_00_sfnt_off000061b5.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000061b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61B5 5436 bytes
SHA-256: f6008cf071912f61af5bba63ac93cf8dfb907f887a8116e993da9590c773eb15
font_01_sfnt_off0000742f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x742F 9736 bytes
SHA-256: c7cedafe09cd2f008b9fa5d145310cf797f2713134564421d99a7e38ffe7126c