Malicious PDF — malware analysis report

Static analysis result for SHA-256 11adf0b1ba987fb4…

MALICIOUS

PDF

39.9 KB Created: 2020-10-01 18:58:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 24398fb2112d907494afbb05dc89de21 SHA-1: eccd202643631a5d99336a6a8c1156120e29da82 SHA-256: 11adf0b1ba987fb42c84ece6606a044f9aa7096367630258101f32e5dce8819e
184 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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=summary+of+all+accounting+standards+pdf In PDF document text
    • http://kubebita.illumebloomskincare.com/uploads/1/3/2/6/132683438/bebet_pufegunaji_mixozatesa_xoruxejobixe.pdfIn PDF document text
    • http://bidatomit.kaitlynthomas.net/uploads/1/3/0/8/130873863/xibenizoxit.pdfIn PDF document text
    • http://tovuge.yupzup.com/uploads/1/3/0/7/130739059/wowukav.pdfIn PDF document text
    • http://files.shopatlantaskinspot.com/uploads/1/3/0/7/130775760/juwiwon_vadaladi_mupedu.pdfIn PDF document text
    • http://lunemeda.thesoftearth.com/uploads/1/3/0/7/130776823/53e5331497c0db9.pdfIn PDF document text
    • http://mevedo.c2p.com/uploads/1/3/2/6/132681352/xojumenojo-lurijikix.pdfIn PDF document text
    • http://luwul.footnotinghistory.com/uploads/1/3/1/8/131857544/ccfed5549bdd.pdfIn PDF document text
    • https://site-1036775.mozfiles.com/files/1036775/dudigidugare.pdfIn PDF document text
    • https://site-1036848.mozfiles.com/files/1036848/87509404588.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8298/1278/files/waterboss_700_manual_regeneration.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/8565/4944/files/rokomepurupepobenij.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8176/7841/files/19379465009.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_off00005d88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D88 5680 bytes
SHA-256: 94a6a93d8dbdc70a666e64e09c9b02c3cccd15e1b4696f97d4060b4a0ddbfb1b
font_01_sfnt_off000070d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x70D4 9840 bytes
SHA-256: 9b5c20452c509b9655c649c370ddcdde2e5e4717cd7ff26bfcf691b576094492