Malicious PDF — malware analysis report

Static analysis result for SHA-256 771fa2c3b28bee29…

MALICIOUS

PDF

52.6 KB Created: 2020-10-14 23:59:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: f701c182a0e0b46b0ba544e55664caff SHA-1: 78f950fb733c91fa385df21cfa67a7b977cd780e SHA-256: 771fa2c3b28bee299090cfbb380e12cfd559da501004c4966a1ec5da76822d85
192 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.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://ggtraff.ru/pify?keyword=live+nettv+4.6+apk+file In PDF document text
    • https://site-1036960.mozfiles.com/files/1036960/71178240219.pdfIn PDF document text
    • https://site-1039621.mozfiles.com/files/1039621/63868143420.pdfIn PDF document text
    • https://site-1038916.mozfiles.com/files/1038916/80050409525.pdfIn PDF document text
    • https://site-1044503.mozfiles.com/files/1044503/vuvelesagogepojogawuxol.pdfIn PDF document text
    • https://fijojonibiw.weebly.com/uploads/1/3/2/6/132681787/5058540.pdfIn PDF document text
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/dbbd04.pdfIn PDF document text
    • https://gevafitasib.weebly.com/uploads/1/3/1/3/131380901/e27909d0be.pdfIn PDF document text
    • https://keniwuki.weebly.com/uploads/1/3/1/4/131483234/7885719.pdfIn PDF document text
    • https://nukevokisoget.weebly.com/uploads/1/3/2/7/132711970/6404364.pdfIn PDF document text
    • https://remewizefo.weebly.com/uploads/1/3/1/8/131856163/dilujekup.pdfIn PDF document text
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/4041939.pdfIn PDF document text
    • https://nudojafobedem.weebly.com/uploads/1/3/1/3/131379550/eaff109ab94007.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/cbaf4d6b-caad-4801-8056-f683b9bc8761/nuwosezebiv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/887c3aaf-57f7-4919-9c6b-598b4f15e7e1/xupiwoxunutelesis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d09ae343-bf46-4bc3-b59c-f0d308211257/nisimojinulobola.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6f9761b4-9f65-41d2-b777-aa6172244b9e/xotusawos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e22d9603-729b-4ebf-97bb-81878b2d7661/73579170465.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/14a58438-1c79-4145-927a-b374661c660d/valejokepade.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3cea1b67-bdf8-4f40-a799-8cd9b0a07a92/41420318504.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b4eb017e-6d0c-49cf-ab1b-e46b727f4f66/kunajizeloferido.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/3769/9479/files/cherokee_casino_buffet_open.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/7976/9498/files/tenivosowojewotudosunak.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/5103/0949/files/molarity_worksheet_2_answer_key.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/3309/0974/files/black_diamond_concepts_salary.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/7944/3639/files/tebodosiru.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_off00008fcd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8FCD 4960 bytes
SHA-256: 1a332daba9de530e75d0922d753d46c61310e0a7b606bc58d5b0bd3746f8b5b3
font_01_sfnt_off0000a0e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA0E0 10652 bytes
SHA-256: 37ab444c781a905110b4a66e5ab5fabc87b028f1b32953989358bead97e429da