Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d8c57cefdb0ab46…

MALICIOUS

PDF

49.6 KB Created: 2020-10-02 16:15:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 74653a4732a2ad04ad70a5a48a2e5231 SHA-1: 629224e8a51835e88121b1c3b200eb09993f112a SHA-256: 4d8c57cefdb0ab46e2c485f3fc79628bdb30dc5192ace7c35a84a94bbe36294c
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/strik?keyword=libros+de+dise%25C3%25B1o+editorial In PDF document text
    • http://files.parkesautodetailing.com/uploads/1/3/1/8/131856374/73de7231b22.pdfIn PDF document text
    • http://files.scongerarchitects.com/uploads/1/3/0/7/130739315/58e1d7262c2.pdfIn PDF document text
    • http://sudunesa.thequestofjz.com/uploads/1/3/0/8/130814229/koninoxawibipop_bakukarelema_sukadawilex_bipadozebozoga.pdfIn PDF document text
    • http://files.apitoxin.se/uploads/1/3/0/9/130969939/29fe49b.pdfIn PDF document text
    • http://nadeb.codergals.org/uploads/1/3/1/4/131453194/5364465.pdfIn PDF document text
    • http://larip.cre8mag.com/uploads/1/3/2/6/132695829/bolop-bugoxupopeka-teketebu-rixatupovuli.pdfIn PDF document text
    • http://files.thesloecook.co.uk/uploads/1/3/0/8/130873851/6743066.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2435/8298/files/soxofotenokefuzelek.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5661/8917/files/gotanutipetamofari.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1986/0125/files/49880241923.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2358/0830/files/crisis_response_project.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0462/2224/6042/files/hay_day_free_diamonds_and_coins_without_survey.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/3867/6894/files/68323296861.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2665/2055/files/besit.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000075d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x75D8 4796 bytes
SHA-256: bbc60777521e0993912339fafcbfad0d741a6709ba96e1f7e2371cb7918e9aa2
font_01_sfnt_off0000861b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x861B 10732 bytes
SHA-256: bdf1f7361a8774fc39354ec4a97eaed7ce93b0b7c2d4cd7516b24630e7bb2fbf
font_02_sfnt_off0000a930.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA930 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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