Malicious PDF — malware analysis report

Static analysis result for SHA-256 453fd7f2629ef8a3…

MALICIOUS

PDF

42.1 KB Created: 2020-09-30 12:41:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 5b2dcadc1bbc14bac462ca9cbfbe5eff SHA-1: 618606e41f1e2d0089ea1cb6402be1e4d0e411cd SHA-256: 453fd7f2629ef8a35d3c7a00d69b6f98a4a1a3124beb3e12528c6e9a07f3cdac
224 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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=fated+alyson+noel+pdf In PDF document text
    • https://site-1037138.mozfiles.com/files/1037138/58584912653.pdfIn PDF document text
    • https://site-1036786.mozfiles.com/files/1036786/77299320453.pdfIn PDF document text
    • https://site-1037138.mozfiles.com/files/1037138/44170425331.pdfIn PDF document text
    • https://site-1036655.mozfiles.com/files/1036655/70757837975.pdfIn PDF document text
    • http://files.ksyee.com/uploads/1/3/2/8/132815808/goboxetuzotu.pdfIn PDF document text
    • http://tukob.math-metropolis.com/uploads/1/3/1/8/131856046/3eb7ba2.pdfIn PDF document text
    • http://files.shoelocker.net/uploads/1/3/0/8/130874592/zowotokukotitupoka.pdfIn PDF document text
    • http://tumebuba.nhsofdav.com/uploads/1/3/1/4/131406841/7530e7be82fe8b.pdfIn PDF document text
    • http://vezapav.beautyandthebuddha.com/uploads/1/3/2/6/132681504/jowovosaj.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/1/0433/0687/7080/files/mojijemorewowasimagaxo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4683/8167/files/madea_goes_to_jail_play_free_online_123movies.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/8726/3899/files/jofowubudiwevexomifosek.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e1a6f25e-2c4d-426b-b091-6ecb8955306d/74705724601.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a88be4a8-b67e-4277-9e05-5c2b776f7ca7/libofafosikevifafusu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/39b23d39-373b-4679-bcc3-9b2badf8f04d/84421961597.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d861e3c5-cd95-4c76-b378-6d0cd39d77ea/31086313095.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_off000067fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x67FE 4996 bytes
SHA-256: c67fea49a93bb1ca63f6d7390be7a5809856778d85c131547f731988780baddc
font_01_sfnt_off00007924.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7924 10036 bytes
SHA-256: bf3862a15d93ca8b3b61629a1b3ef5357b5db6ed20f89fc90c4b3f1c188d675f

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