Malicious PDF — malware analysis report

Static analysis result for SHA-256 b03f82771ef9fee7…

MALICIOUS

PDF

44.2 KB Created: 2020-10-18 09:30:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 2fa05a16db177ec08a8db61679be6df1 SHA-1: 787158324f48a756c56cc70ecc6d48cab859964a SHA-256: b03f82771ef9fee780a32d0f05703922c323184520ced16566436039b2b2da03
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://gettraff.ru/123?keyword=ultrasonic+and+acoustic+emission+techniques+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4374009/normal_5f8bcc0f4722f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365599/normal_5f871657ba587.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367668/normal_5f8752036c545.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367305/normal_5f875336b309c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370052/normal_5f88a74d33651.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/411b8094-cdd3-4692-b9c5-df23eb5b6154/36273220251.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b9ea3c24-8c45-4d66-af18-941590f6f2ff/59374441182.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8510e2f8-f659-43ec-85b8-d57a06ae5fe1/36774531810.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e292a44-9e6d-4789-b2c1-359e5580573e/resukeka.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d3955824-d23f-4682-a9c9-63420df2dbf3/kigutubenopopeguwozido.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/49372557-6550-448b-af12-d86f287f5fc6/niviniritaputorazi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/818073ab-5139-4fe4-a4c7-db9ee0a80cb4/saxenadesaf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bb463487-c4b8-4d78-b957-baae197f08dd/36593254387.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/27d85b67-523c-4ca6-8a5a-b262cce55ea5/94599642995.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e66277b3-d938-4f79-8bc8-77ee4b9215bf/gexejepevudux.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e6e6d26-9ab4-4bab-8d90-b696fc49c185/dafodoronunubunejugomobi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/43135a0e-2867-4cd0-9cca-5e629388a545/tesla_code_secrets.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f7ae468b-cd4b-4470-aaa1-7336dabfc88f/sports_complex_business_plan_example.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/4936/8743/files/nol_carryover_worksheet_instructions.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0714/6146/files/saravanan_meenakshi_today_episode.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5054/0964/files/harry_potter_themed_personal_checks.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0493/5254/0319/files/black_google_chrome_theme_android.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/3717/9042/files/royal_seas_cruises_grand_celebration.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_off00006dc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6DC6 5512 bytes
SHA-256: e734cb357d9bd3330d6952991fefb61be5d80b56816704b4ea11075aa56660ca
font_01_sfnt_off0000804e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x804E 10220 bytes
SHA-256: facbd7f7e261da1053ec8ea21c20e8972698fe852b4aded50dde4808bf1b45af