Malicious PDF — malware analysis report

Static analysis result for SHA-256 c030965e5f477945…

MALICIOUS

PDF

57.1 KB Created: 2020-10-15 04:59:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: cd3fc86594dfba73e6beff7c17066fcd SHA-1: e3b8336b36868d6b2f825f10036a696290e9511f SHA-256: c030965e5f47794550a6b4bc02494062260791b4015594060fe6c989f72555c8
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/123?keyword=unit+circle+worksheet+%25232+answers In PDF document text
    • https://kubupukadumu.weebly.com/uploads/1/3/1/3/131382740/denerad_sebegodidiker_duwegoxivefow.pdfIn PDF document text
    • https://sepenunaxob.weebly.com/uploads/1/3/0/7/130776074/865478.pdfIn PDF document text
    • https://pobezewimo.weebly.com/uploads/1/3/2/6/132681951/kupanigepotitam.pdfIn PDF document text
    • https://megadezatesaram.weebly.com/uploads/1/3/0/7/130776649/6281772.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/gozawawi.pdfIn PDF document text
    • https://jufaxexave.weebly.com/uploads/1/3/0/7/130775513/7fde262bb4b.pdfIn PDF document text
    • https://dujewukemapaf.weebly.com/uploads/1/3/1/4/131453220/konipojumujud.pdfIn PDF document text
    • https://fadusoga.weebly.com/uploads/1/3/0/7/130739873/mafezoluruzowez.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/ratefunerod.pdfIn PDF document text
    • https://site-1043405.mozfiles.com/files/1043405/noreren.pdfIn PDF document text
    • https://site-1041614.mozfiles.com/files/1041614/getukavinuto.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/1/0481/6587/9957/files/46782128987.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/9971/6257/files/xukuwokubebetiko.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/1404/4827/files/sapetirajunoguk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1090dc8b-757f-4db3-857d-9c26316250e2/lagakafesavuz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/30c31df9-abfd-4535-823b-24be0c7db591/sageputimamiv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0dfb0410-de6c-4800-af5a-1d729bdcdebd/77412114055.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d5a2c0e-bcab-49d4-bdb1-00cf361d7c73/sirumevome.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/acc93f3e-60f3-416f-8fa1-0ee5de06b63c/xuvanovara.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_off000099cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x99CD 4824 bytes
SHA-256: e94605710ddba46ffd714d31d0b1cb680c238633f6aa12146930cfe238102115
font_01_sfnt_off0000aa39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAA39 14240 bytes
SHA-256: 7f386833951b37232d6d023b3aadd48866ad505326c6fa8dca2de6675dbfe3bd

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